STRUCTURE OF RBHSO4 IN ITS PARAELECTRIC PHASE

The structure of the paraelectric phase of RbHSO//4 has been determined by X-ray and neutron diffraction at T equals 23 degree C. The structure consists of two crystallographically independent molecules in the asymmetric unit. Each of the independent sulphate tetrahedra is linked to a translationally equivalent sulphate by acentrically ordered hydrogen bonds. Some evidence is found for the disordering of one of the sulphate groups in the asymmetric unit. The bond lengths and angles are similar to those found in isomorphous NH//4HSO//4.