(1) Department of Chemistry, Nizhni Novgorod State University, pr. Gagarina 23, Nizhni Novgorod, 603950, Russia;(2) Faculty of Geology, Moscow State University, Vorob’evy gory, Moscow, 119992, Russia
Abstract:
Phosphate CaGdTh(PO4)3 was prepared by thermal treatment of a mixture of oxides. The final temperature was 1400°C. The phosphate was characterized by powder X-ray diffraction analysis and IR spectroscopy. The crystal structure was studied by the Rietveld method. The compound crystallizes in the monazite structure type (sp. gr. P21/n). A comparative analysis of the structures of this phosphate and cerium orthophosphate CePO4 was carried out.