Preparation and Properties of the New High Pressure Phase β-Zr(OH)PO4

A new phase with chemical formula Zr(OH)PO4 was prepared above 1.5 GPa using a high pressure apparatus. Stability field of the compound was investigated, and X-ray study for a single crystal revealed that it is orthorhombic with space group Cmca or C2ca. The X-ray data are similar to those of Zr2O(PO4)2.