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  1. .gitattributes +2 -0
  2. README.md +412 -3
  3. relaxed.db +3 -0
  4. relaxed_latents/linkers_morgan_ecfp4.npy +3 -0
  5. relaxed_latents/linkers_morgan_ecfp4_standardized.npy +3 -0
  6. relaxed_latents/linkers_morgan_ecfp6.npy +3 -0
  7. relaxed_latents/linkers_morgan_ecfp6_standardized.npy +3 -0
  8. relaxed_latents/orb_latent_0_bound_solvent.npy +3 -0
  9. relaxed_latents/orb_latent_0_free_solvent.npy +3 -0
  10. relaxed_latents/orb_latent_0_graph.npy +3 -0
  11. relaxed_latents/orb_latent_0_linkers.npy +3 -0
  12. relaxed_latents/orb_latent_0_nodes_and_bridges.npy +3 -0
  13. relaxed_latents/orb_latent_1_bound_solvent.npy +3 -0
  14. relaxed_latents/orb_latent_1_free_solvent.npy +3 -0
  15. relaxed_latents/orb_latent_1_graph.npy +3 -0
  16. relaxed_latents/orb_latent_1_linkers.npy +3 -0
  17. relaxed_latents/orb_latent_1_nodes_and_bridges.npy +3 -0
  18. relaxed_latents/orb_latent_2_bound_solvent.npy +3 -0
  19. relaxed_latents/orb_latent_2_free_solvent.npy +3 -0
  20. relaxed_latents/orb_latent_2_graph.npy +3 -0
  21. relaxed_latents/orb_latent_2_linkers.npy +3 -0
  22. relaxed_latents/orb_latent_2_nodes_and_bridges.npy +3 -0
  23. relaxed_latents/orb_latent_3_bound_solvent.npy +3 -0
  24. relaxed_latents/orb_latent_3_free_solvent.npy +3 -0
  25. relaxed_latents/orb_latent_3_graph.npy +3 -0
  26. relaxed_latents/orb_latent_3_linkers.npy +3 -0
  27. relaxed_latents/orb_latent_3_nodes_and_bridges.npy +3 -0
  28. relaxed_latents/orb_latent_4_bound_solvent.npy +3 -0
  29. relaxed_latents/orb_latent_4_free_solvent.npy +3 -0
  30. relaxed_latents/orb_latent_4_graph.npy +3 -0
  31. relaxed_latents/orb_latent_4_linkers.npy +3 -0
  32. relaxed_latents/orb_latent_4_nodes_and_bridges.npy +3 -0
  33. sample_latents/linkers_morgan_ecfp4.npy +3 -0
  34. sample_latents/linkers_morgan_ecfp4_standardized.npy +3 -0
  35. sample_latents/linkers_morgan_ecfp6.npy +3 -0
  36. sample_latents/linkers_morgan_ecfp6_standardized.npy +3 -0
  37. sample_latents/orb_latent_0_bound_solvent.npy +3 -0
  38. sample_latents/orb_latent_0_free_solvent.npy +3 -0
  39. sample_latents/orb_latent_0_graph.npy +3 -0
  40. sample_latents/orb_latent_0_linkers.npy +3 -0
  41. sample_latents/orb_latent_0_nodes_and_bridges.npy +3 -0
  42. sample_latents/orb_latent_1_bound_solvent.npy +3 -0
  43. sample_latents/orb_latent_1_free_solvent.npy +3 -0
  44. sample_latents/orb_latent_1_graph.npy +3 -0
  45. sample_latents/orb_latent_1_linkers.npy +3 -0
  46. sample_latents/orb_latent_1_nodes_and_bridges.npy +3 -0
  47. sample_latents/orb_latent_2_bound_solvent.npy +3 -0
  48. sample_latents/orb_latent_2_free_solvent.npy +3 -0
  49. sample_latents/orb_latent_2_graph.npy +3 -0
  50. sample_latents/orb_latent_2_linkers.npy +3 -0
.gitattributes CHANGED
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  # Video files - compressed
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  *.mp4 filter=lfs diff=lfs merge=lfs -text
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  *.webm filter=lfs diff=lfs merge=lfs -text
 
 
 
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  # Video files - compressed
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  *.mp4 filter=lfs diff=lfs merge=lfs -text
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  *.webm filter=lfs diff=lfs merge=lfs -text
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+ samples.db filter=lfs diff=lfs merge=lfs -text
README.md CHANGED
@@ -1,3 +1,412 @@
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- ---
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- license: cc-by-4.0
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- ---
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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+ # MofasaDB
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+
3
+ ---
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+
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+ ## Table of Contents
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+
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+ 1. [Database Overview](#database-overview)
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+ 2. [Quick Start](#quick-start)
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+ 3. [Property Reference](#property-reference)
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+ 4. [Structural Properties](#structural-properties)
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+ 5. [MOFID Properties](#mofid-properties)
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+ 6. [Zeo++ Geometric Properties](#zeo-geometric-properties)
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+ 7. [ORB Properties](#orb-properties)
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+ 8. [MOFChecker Properties](#mofchecker-properties)
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+ 9. [MOF Fragment Properties](#mof-fragment-properties)
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+ 10. [Linker Properties](#linker-properties)
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+ 11. [Validation Metrics](#validation-metrics)
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+
19
+ ---
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+
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+ ## Database Overview
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+
23
+ The database contains unconditionally generated MOF (Metal-Organic Framework) structures from Mofasa, along with their geometry-relaxed counterparts.
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+
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+ ### Files
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+
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+ | File | Description |
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+ |------|-------------|
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+ | `samples.db` | Original generated MOF structures |
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+ | `relaxed.db` | Geometry-relaxed versions of the samples |
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+ | `sample_latents/` | ORB latent embeddings for samples |
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+ | `relaxed_latents/` | ORB latent embeddings for relaxed structures |
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+
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+ ### Data Alignment
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+
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+ The databases are **row-aligned**: row *i* in `samples.db` corresponds to row *i* in `relaxed.db`.
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+
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+ **Indexing:**
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+ - ASE databases are **1-indexed**: first row is `db.get(1)`
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+ - NumPy arrays are **0-indexed**: first element is `array[0]`
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+ - Therefore: `latent[i]` corresponds to `db.get(i + 1)`
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+
43
+ ---
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+
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+ ## Quick Start
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+
47
+ ### Load a Structure
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+
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+ ```python
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+ from ase.db import connect
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+
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+ db = connect("samples.db")
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+ row_id = 1
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+ row = db.get(row_id) # Get first structure (1-indexed)
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+ atoms = row.toatoms() # Convert to ASE Atoms object
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+ print(atoms.get_chemical_formula())
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+ ```
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+
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+ ### Access Properties
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+
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+ ```python
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+ # Get energy per atom
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+ energy = row.data['properties']['orb_properties']['orb_energy_per_atom']
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+
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+ # Get pore diameter
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+ lcd = row.data['properties']['pyzeo_geometric_properties']['lcd']
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+
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+ # Get topology (top-level property)
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+ topology = row.data['topology']
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+ ```
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+
72
+ ### Load Orb Latent Embeddings
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+
74
+ ```python
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+ import numpy as np
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+
77
+ latents = np.load("sample_latents/orb_latent_4_graph.npy")
78
+ latent = latents[row_id - 1] # Convert 1-indexed row to 0-indexed array
79
+ ```
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+
81
+ ### Compare Sample and Relaxed
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+
83
+ ```python
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+ sample_db = connect("samples.db")
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+ relaxed_db = connect("relaxed.db")
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+
87
+ # Row i in both databases correspond to the same structure
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+ row_id = 100
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+ sample_atoms = sample_db.get(row_id).toatoms()
90
+ relaxed_atoms = relaxed_db.get(row_id).toatoms()
91
+
92
+ print(f"Sample formula: {sample_atoms.get_chemical_formula()}")
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+ print(f"Relaxed formula: {relaxed_atoms.get_chemical_formula()}")
94
+ ```
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+
96
+ ---
97
+
98
+ ## Property Reference
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+
100
+ Properties are stored in `row.data` with nested paths:
101
+
102
+ ```python
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+ PROPERTY_PATHS = {
104
+ # ORB model properties
105
+ 'orb_energy_per_atom': 'properties.orb_properties.orb_energy_per_atom',
106
+ 'orb_max_force': 'properties.orb_properties.orb_max_force',
107
+ # Pyzeo geometric properties
108
+ 'lcd': 'properties.pyzeo_geometric_properties.lcd',
109
+ 'pld': 'properties.pyzeo_geometric_properties.pld',
110
+ 'dif': 'properties.pyzeo_geometric_properties.dif',
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+ 'av_volume_fraction': 'properties.pyzeo_geometric_properties.av_volume_fraction',
112
+ 'av_cm3_per_g': 'properties.pyzeo_geometric_properties.av_cm3_per_g',
113
+ 'number_of_channels': 'properties.pyzeo_geometric_properties.number_of_channels',
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+ # Crystal symmetry
115
+ 'spacegroup_number': 'properties.crystal_symmetry.spacegroup_number',
116
+ # Top-level properties
117
+ 'max_force': 'max_force',
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+ 'geo_converged': 'geo_converged',
119
+ 'mofid': 'mofid',
120
+ 'topology': 'topology',
121
+ }
122
+ ```
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+
124
+ ---
125
+
126
+ ## Structural Properties
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+
128
+ ### Lattice Parameters
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+
130
+ | Key | Type | Description |
131
+ |-----|------|-------------|
132
+ | `lattice_a` | float | Unit cell length along the *a*-axis (Å) |
133
+ | `lattice_b` | float | Unit cell length along the *b*-axis (Å) |
134
+ | `lattice_c` | float | Unit cell length along the *c*-axis (Å) |
135
+ | `lattice_alpha` | float | Angle between *b* and *c* axes (degrees) |
136
+ | `lattice_beta` | float | Angle between *a* and *c* axes (degrees) |
137
+ | `lattice_gamma` | float | Angle between *a* and *b* axes (degrees) |
138
+
139
+ ### Chemical Composition
140
+
141
+ | Key | Type | Description |
142
+ |-----|------|-------------|
143
+ | `reduced_formula` | str | Empirical (reduced) chemical formula of the structure |
144
+
145
+ ---
146
+
147
+ ## MOFID Properties
148
+
149
+ MOFID is a standardized identifier for MOF structures that encodes topology, nodes, linkers, and catenation information.
150
+
151
+ | Key | Type | Description |
152
+ |-----|------|-------------|
153
+ | `mofid` | str | Full MOFID identifier string. Format: `{nodes}.{linkers} MOFid-v1.{topology}.cat{n}`. Value is `"UNKNOWN"` if MOFID could not be computed. |
154
+ | `mofkey` | str | MOFKey identifier (a hash-based representation of the MOF structure). Format: `{hash}.{topology}.MOFkey-v1.{short_code}`. Value is `"UNKNOWN"` if MOFKey could not be computed. |
155
+ | `nodes` | str | Concatenated SMILES strings of all distinct metal nodes (`.`-separated). Value is `"UNKNOWN"` if not available. |
156
+ | `linkers` | str | Concatenated SMILES strings of all distinct organic linkers (`.`-separated). Value is `"UNKNOWN"` if not available. |
157
+ | `num_distinct_nodes` | int | Number of chemically distinct metal node types in the MOF |
158
+ | `num_distinct_linkers` | int | Number of chemically distinct organic linker types in the MOF |
159
+ | `topology` | str | Three-letter RCSR topology code (e.g., `"pcu"`, `"dia"`, `"fcu"`). Value is `"UNKNOWN"` if topology could not be determined. |
160
+ | `topology_v2` | str | Alternative topology assignment (may differ from primary if ambiguous) |
161
+ | `catenation` | int | Catenation number (degree of interpenetration). 0 = non-catenated, n = n-fold catenated |
162
+ | `mofid_comment` | str | Additional comments from MOFID analysis (may contain warnings or processing notes) |
163
+
164
+ ---
165
+
166
+ ## Crystal Symmetry
167
+
168
+ Computed using [pymatgen](https://pymatgen.org/)'s `SpacegroupAnalyzer`.
169
+
170
+ | Key | Type | Description |
171
+ |-----|------|-------------|
172
+ | `spacegroup` | str | Crystal system from space group analysis at `symprec=0.01` (e.g., `"cubic"`, `"triclinic"`) |
173
+ | `spacegroup_v2` | str | Crystal system from space group analysis at `symprec=0.1` (more tolerant symmetry detection) |
174
+
175
+ ### Detailed Crystal Symmetry (nested under `properties.crystal_symmetry`)
176
+
177
+ | Key | Type | Description |
178
+ |-----|------|-------------|
179
+ | `symprec_0.01/pointgroup` | str | Point group symbol (Hermann-Mauguin notation) |
180
+ | `symprec_0.01/spacegroup` | str | Space group symbol (Hermann-Mauguin notation) |
181
+ | `symprec_0.01/spacegroup_number` | int | International Tables space group number (1-230) |
182
+ | `symprec_0.01/spacegroup_crystal` | str | Crystal system name |
183
+ | `symprec_0.1/pointgroup` | str | Point group symbol (at looser tolerance) |
184
+ | `symprec_0.1/spacegroup` | str | Space group symbol (at looser tolerance) |
185
+ | `symprec_0.1/spacegroup_number` | int | Space group number (at looser tolerance) |
186
+ | `symprec_0.1/spacegroup_crystal` | str | Crystal system name (at looser tolerance) |
187
+
188
+ ---
189
+
190
+ ## Zeo++ Geometric Properties
191
+
192
+ Computed using [Zeo++](http://www.zeoplusplus.org/) via the pyzeo wrapper. These properties characterize the pore geometry and accessibility using a spherical probe (default: N₂ probe radius of 1.86 Å).
193
+
194
+ ### Pore Descriptors
195
+
196
+ | Key | Type | Unit | Description |
197
+ |-----|------|------|-------------|
198
+ | `lcd` | float | Å | **Largest Cavity Diameter** – Diameter of the largest sphere that can fit in the pore without overlapping framework atoms |
199
+ | `pld` | float | Å | **Pore Limiting Diameter** – Diameter of the largest sphere that can percolate through the framework (i.e., the narrowest point along the largest channel) |
200
+ | `dif` | float | Å | **Diameter of Included sphere along Free path** – Diameter of the largest sphere that can diffuse along the accessible path |
201
+ | `number_of_channels` | int | — | Number of distinct connected channel systems in the framework |
202
+ | `number_of_pockets` | int | — | Number of isolated pores (inaccessible to the probe molecule) |
203
+
204
+ ### Volume Properties
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+
206
+ | Key | Type | Unit | Description |
207
+ |-----|------|------|-------------|
208
+ | `av_volume_fraction` | float | — | Fraction of unit cell volume that is accessible to the probe |
209
+ | `av_cm3_per_g` | float | cm³/g | Accessible pore volume per gram of framework |
210
+ | `nav_volume_fraction` | float | — | Fraction of unit cell volume that is non-accessible (pocket volume) |
211
+ | `nav_cm3_per_g` | float | cm³/g | Non-accessible volume per gram of framework |
212
+ | `channel_volume_fraction` | float | — | Fraction of total void volume that belongs to channels |
213
+ | `pocket_volume_fraction` | float | — | Fraction of total void volume that belongs to pockets |
214
+
215
+ ### Surface Area Properties
216
+
217
+ | Key | Type | Unit | Description |
218
+ |-----|------|------|-------------|
219
+ | `asa_m2_per_cm3` | float | m²/cm³ | Accessible surface area per unit volume |
220
+ | `asa_m2_per_g` | float | m²/g | **Accessible Surface Area** per gram (comparable to BET surface area) |
221
+ | `nasa_m2_per_cm3` | float | m²/cm³ | Non-accessible surface area per unit volume |
222
+ | `nasa_m2_per_g` | float | m²/g | Non-accessible surface area per gram |
223
+ | `channel_surface_area_fraction` | float | — | Fraction of total surface area belonging to channels |
224
+ | `pocket_surface_area_fraction` | float | — | Fraction of total surface area belonging to pockets |
225
+
226
+ ---
227
+
228
+ ## ORB Properties
229
+
230
+ Properties computed using the [ORB](https://github.com/orbital-materials/orb-models) machine learning force field.
231
+
232
+ ### Energy and Forces
233
+
234
+ | Key | Type | Unit | Description |
235
+ |-----|------|------|-------------|
236
+ | `orb_energy_per_atom` | float | eV/atom | Total predicted energy divided by number of atoms |
237
+ | `orb_max_force` | float | eV/Å | Maximum force magnitude on any atom in the structure |
238
+
239
+ ### ORB Latent Embeddings
240
+
241
+ ORB latent embeddings are stored as NumPy files in the `sample_latents/` and `relaxed_latents/` directories.
242
+
243
+ **File naming:** `orb_latent_{layer}_{component}.npy`
244
+
245
+ | File Pattern | Shape | Description |
246
+ |--------------|-------|-------------|
247
+ | `orb_latent_{0-4}_graph` | (N, 256) | Graph-level pooled latent |
248
+ | `orb_latent_{0-4}_nodes_and_bridges` | (N, 256) | Mean-pooled over metal nodes |
249
+ | `orb_latent_{0-4}_linkers` | (N, 256) | Mean-pooled over organic linkers |
250
+ | `orb_latent_{0-4}_bound_solvent` | (N, 256) | Mean-pooled over bound solvents |
251
+ | `orb_latent_{0-4}_free_solvent` | (N, 256) | Mean-pooled over free solvents |
252
+
253
+ - Layers 0-4 correspond to different depths in the ORB GNN (layer 4 = final layer)
254
+ - **Zero vectors** indicate missing data (e.g., structures without solvents)
255
+
256
+ ---
257
+
258
+ ## MOFChecker Properties
259
+
260
+ Computed using [MOFChecker](https://github.com/kjappelbaum/mofchecker), a tool for validating MOF structures. All keys are prefixed with `mofchecker_`.
261
+
262
+ ### Validity Checks (Binary)
263
+
264
+ These descriptors are used to determine overall MOF validity. **True indicates a problem** (except where noted).
265
+
266
+ | Key | Type | Description |
267
+ |-----|------|-------------|
268
+ | `mofchecker_valid` | bool | Overall validity flag. `True` if structure passes all validity checks. |
269
+ | `mofchecker_no_carbon` | bool | `True` if structure contains no carbon atoms (invalid for organic-based MOFs) |
270
+ | `mofchecker_no_hydrogen` | bool | `True` if structure contains no hydrogen atoms |
271
+ | `mofchecker_no_metal` | bool | `True` if structure contains no metal atoms |
272
+ | `mofchecker_has_atomic_overlaps` | bool | `True` if any atoms are too close together |
273
+ | `mofchecker_has_lone_molecule` | bool | `True` if structure contains disconnected molecular fragments |
274
+ | `mofchecker_has_overcoordinated_c` | bool | `True` if any carbon has too many bonds |
275
+ | `mofchecker_has_overcoordinated_n` | bool | `True` if any nitrogen has too many bonds |
276
+ | `mofchecker_has_overcoordinated_h` | bool | `True` if any hydrogen has too many bonds |
277
+ | `mofchecker_has_undercoordinated_c` | bool | `True` if any carbon has too few bonds |
278
+ | `mofchecker_has_undercoordinated_n` | bool | `True` if any nitrogen has too few bonds |
279
+ | `mofchecker_has_undercoordinated_rare_earth` | bool | `True` if any rare earth metal is undercoordinated |
280
+ | `mofchecker_has_undercoordinated_alkali_alkaline` | bool | `True` if any alkali/alkaline earth metal is undercoordinated |
281
+ | `mofchecker_has_suspicious_terminal_oxo` | bool | `True` if structure has potentially incorrect terminal oxo groups on metals |
282
+ | `mofchecker_has_geometrically_exposed_metal` | bool | `True` if any metal has unusual coordination geometry |
283
+ | `mofchecker_has_high_charges` | bool | `True` if computed partial charges are unusually high |
284
+
285
+ ### Informative Checks (Binary, not used for validity)
286
+
287
+ | Key | Type | Description |
288
+ |-----|------|-------------|
289
+ | `mofchecker_has_oms` | bool | `True` if structure has Open Metal Sites (coordinatively unsaturated metals) |
290
+ | `mofchecker_has_3d_connected_graph` | bool | `True` if the framework is 3D-connected (expected for MOFs) |
291
+
292
+ ### Structure Hashes
293
+
294
+ | Key | Type | Description |
295
+ |-----|------|-------------|
296
+ | `mofchecker_graph_hash` | str | Hash of the full structure graph (atoms + bonds) |
297
+ | `mofchecker_undecorated_graph_hash` | str | Hash of graph with hydrogen atoms removed |
298
+ | `mofchecker_decorated_scaffold_hash` | str | Hash of framework scaffold with decorations |
299
+ | `mofchecker_undecorated_scaffold_hash` | str | Hash of bare framework scaffold |
300
+ | `mofchecker_symmetry_hash` | str | Hash encoding symmetry information |
301
+
302
+ ---
303
+
304
+ ## MOF Fragment Properties
305
+
306
+ Properties of the decomposed MOF components (nodes, linkers, solvents). Stored under `properties.mof_fragments`.
307
+
308
+ ### Component Types
309
+
310
+ MOF structures are decomposed into four component types:
311
+ - **nodes_and_bridges**: Metal nodes and bridging groups
312
+ - **linkers**: Organic linker molecules
313
+ - **bound_solvent**: Solvent molecules coordinated to metal centers
314
+ - **free_solvent**: Unbound solvent molecules in pores
315
+
316
+ ### Fragment Formulas
317
+
318
+ | Key | Type | Description |
319
+ |-----|------|-------------|
320
+ | `{component}_formulas` | List[str] | Chemical formulas of each fragment of this component type |
321
+
322
+ *Example: `nodes_and_bridges_formulas = ["Zn4O", "Zn4O"]` for a structure with two identical zinc nodes*
323
+
324
+ ### Linker SMILES
325
+
326
+ | Key | Type | Description |
327
+ |-----|------|-------------|
328
+ | `linkers_smiles` | List[str] | Full SMILES strings for each linker fragment, including stereochemistry and charges where applicable |
329
+ | `linkers_simple_smiles` | List[str] | Simplified SMILES (scaffold only, no stereochemistry). More robust for parsing but less chemically accurate |
330
+
331
+ ---
332
+
333
+ ## Linker Properties
334
+
335
+ Molecular descriptors and fingerprints for organic linker molecules. Stored under `properties.linker_properties`.
336
+
337
+ ### Morgan Fingerprints
338
+
339
+ Morgan (circular) fingerprints are stored as NumPy files. For similarity search, use the standardized versions.
340
+
341
+ | File | Description |
342
+ |------|-------------|
343
+ | `linkers_morgan_ecfp4.npy` | ECFP4 (radius=2), 2048-bit |
344
+ | `linkers_morgan_ecfp6.npy` | ECFP6 (radius=3), 2048-bit |
345
+ | `linkers_morgan_ecfp4_standardized.npy` | ECFP4 from standardized molecules |
346
+ | `linkers_morgan_ecfp6_standardized.npy` | ECFP6 from standardized molecules |
347
+
348
+ **Scalar metadata:**
349
+
350
+ | Key | Type | Description |
351
+ |-----|------|-------------|
352
+ | `linkers_smiles_used` | List[str] | Which SMILES string was successfully parsed for each linker (original, fixed, or simple) |
353
+ | `linkers_smiles_standardized` | List[str] | Chemically standardized SMILES (neutralized, canonical tautomer) |
354
+ | `linkers_morgan_count_sum` | List[int] | Sum of Morgan fingerprint bit counts (molecular complexity proxy) |
355
+ | `linkers_morgan_count_sum_max` | List[int] | Maximum count in Morgan fingerprint (indicates highly represented substructures) |
356
+ | `linkers_morgan_count_sum_standardized` | List[int] | Sum of counts for standardized fingerprints |
357
+ | `linkers_morgan_count_sum_max_standardized` | List[int] | Maximum count for standardized fingerprints |
358
+
359
+ ### Molecular Descriptors
360
+
361
+ Computed on standardized molecules using RDKit.
362
+
363
+ | Key | Type | Description |
364
+ |-----|------|-------------|
365
+ | `linkers_rotatable_bonds` | List[int] | Number of rotatable bonds per linker (flexibility metric) |
366
+ | `linkers_ring_count` | List[int] | Number of rings per linker |
367
+
368
+ ### Coordination Site Descriptors
369
+
370
+ Counts of metal-coordinating functional groups (computed on as-parsed molecules).
371
+
372
+ | Key | Type | Description |
373
+ |-----|------|-------------|
374
+ | `linkers_coordination_site_count` | List[int] | Total number of potential metal coordination sites per linker |
375
+ | `linkers_coordination_site_breakdown` | List[Dict] | Breakdown by coordination site type |
376
+ | `linkers_carboxylate_count` | List[int] | Number of carboxylate groups (-COO⁻/-COOH) |
377
+ | `linkers_pyridine_count` | List[int] | Number of aromatic nitrogen sites |
378
+ | `linkers_imidazole_n_count` | List[int] | Number of imidazole/triazole NH groups |
379
+ | `linkers_primary_amine_count` | List[int] | Number of primary amine groups (-NH₂) |
380
+ | `linkers_secondary_amine_count` | List[int] | Number of secondary amine groups (-NH-) |
381
+ | `linkers_tertiary_amine_count` | List[int] | Number of tertiary amine groups (-N<) |
382
+ | `linkers_phosphonate_count` | List[int] | Number of phosphonate groups |
383
+ | `linkers_sulfonate_count` | List[int] | Number of sulfonate groups |
384
+ | `linkers_phenolic_oh_count` | List[int] | Number of phenolic hydroxyl groups |
385
+ | `linkers_alcoholic_oh_count` | List[int] | Number of alcoholic hydroxyl groups |
386
+ | `linkers_thiol_count` | List[int] | Number of thiol groups (-SH) |
387
+ | `linkers_nitrile_count` | List[int] | Number of nitrile groups (-C≡N) |
388
+
389
+ ---
390
+
391
+ ## Validation Metrics
392
+
393
+ Binary metrics used to assess structure quality.
394
+
395
+ | Key | Type | Description |
396
+ |-----|------|-------------|
397
+ | `no_atom_too_close` | bool | `True` if all interatomic distances are physically reasonable |
398
+ | `smact_valid` | bool | `True` if composition passes SMACT electronegativity/charge balance checks |
399
+ | `reconstruction_failed` | bool | `True` if structure reconstruction from latent space failed |
400
+
401
+ ---
402
+ ## License
403
+
404
+ cc-by-4.0
405
+
406
+ ## References
407
+
408
+ - **MOFID**: Bucior, B. J., et al. (2019). [Identification Schemes for Metal-Organic Frameworks...](https://doi.org/10.1021/acs.cgd.9b00050)
409
+ - **Zeo++**: Willems, T. F., et al. (2012). [Algorithms and tools for high-throughput geometry-based analysis...](https://doi.org/10.1016/j.micromeso.2011.08.020)
410
+ - **MOFChecker**: Ongari, D., et al. (2019). [Building a Consistent and Reproducible Database for Adsorption Evaluation...](https://doi.org/10.1021/acscentsci.9b00619)
411
+ - **ORB**: [Orbital ORB v3 Force Field](https://github.com/orbital-materials/orb-models)
412
+ - **RDKit Morgan Fingerprints**: [RDKit Documentation](https://www.rdkit.org/docs/GettingStartedInPython.html#morgan-fingerprints-circular-fingerprints)
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