Powder dictionary (pdCIF) version 1.0.1
An arbitrary code is assigned to each peak. Used to link with _pd_refln_peak_id so that multiple hkl and/or phase identifications can be assigned to a single peak. Each peak will have a unique code. In cases where two peaks are severely overlapped, it may be desirable to list them as a single peak. A peak ID must be included for every peak.
Appears in list as essential element of loop structure
May match subsidiary data name(s)