Core dictionary (coreCIF) version 2.4.5
'_exptl_crystal_size_length' '_exptl_crystal_size_max' '_exptl_crystal_size_mid' '_exptl_crystal_size_min' '_exptl_crystal_size_rad'
The maximum, medial and minimum dimensions in millimetres of the crystal. If the crystal is a sphere, then the *_rad item is its radius. If the crystal is a cylinder, then the *_rad item is its radius and the *_length item is its length. These may appear in a list with _exptl_crystal_id if multiple crystals are used in the experiment.
May appear in list containing _exptl_crystal_id
The permitted range is 0.0 -> infinity