Crystal Structures of Tetragonal and Monoclinic RbD₂PO₄ Crystals

Abstract

Neutron crystal structure analysis of the tetragonal and monoclinic RbD ₂ PO ₄ crystals have been perfomed in the high-temperature phase and the intermediate phase, respectively. The structure refinement revealed that the PO ₄ tetrahedra and the D atoms have disordered arrangements in the both crystals. We conclude that the phase transition of the tetragonal and monoclinic RbD ₂ PO ₄ crystals are induced by the ordering of the PO ₄ tetrahedra and the D atoms.

Keywords:

• RbD₂PO₄
• phase transition
• structure analysis
• neutron diffraction