AtomicSystem.from_cod

classmethod AtomicSystem.from_cod(cod_id=None)

Load a structure from the Crystallography Open Database.

Parameters:

cod_idint or str, optional

COD entry to download. Given one, the structure is fetched straight away; omitted, an interactive explorer opens instead. Pass the identifier in a script: the explorer cannot be replayed, and a script that names its structure says where its model came from.

Returns:

AtomicSystem or None

The structure, or None if the explorer was cancelled.

Examples

>>> calcite = AtomicSystem.from_cod(9016705)   # reproducible
>>> system = AtomicSystem.from_cod()           # browse instead