Powder X-ray diffraction data of a new calcium zirconium phosphate Ca_7Zr(PO_4)_6

摘要

X-ray powder diffraction data for a new calcium zirconium phosphate Ca_7Zr(PO_4)_6 are reported. The sample was prepared by heating mixtures of CaCO_3, ZrO_2, and NH_4H_2PO_4 in prescribed molar ratios at 1623 K. Powder diffraction data were collected with a laboratory X-ray source (Cu Kα) for refinement of unit-cell parameters and intensity measurement of individual reflections. Crystallographic data were Ca_7Zr(PO_4)_6, cubic, I-43d (No. 220), a = 0.98338(1)nm, V = 0.95097(3) nm~3, Z=2, and D_x = 3.29 Mg m~(-3). This compound is most probably isomorphous with eulytite.