Anisotropic displacement components in the IUCr core CIF dictionary

Core dictionary version2.4.5, _atom_site_aniso_U_11, _12, _13, _22, _23 and _33, Definition: six entries of a real symmetric matrix in squared angstroms, with explicit structure-factor attenuation using reciprocal-cell lengths and Miller indices. These crystallographic components require the stated cell convention.