An essential guide and reference to CIF for programmers, data managers handling crystal-structure information and practising crystallographers.
Unit-cell lengths in angstroms corresponding to the structure reported. The values of _refln_index_h, *_k, *_l must correspond to the cell defined by these values and _cell_angle_ values. The values of _diffrn_refln_index_h, *_k, *_l may not correspond to these values if a cell transformation took place following the measurement of the diffraction intensities. See also _diffrn_reflns_transf_matrix_.