Defect-Bariumphosphate StructureEquimolar mixtures of Sr3(PO4)2 and SrCrO4 form two high-temperature compounds with different ranges of thermal stability. A rhombo-hedral defect-bariumphosphate structure with hexagonal axes ao - 1091 pm and c0 = 3978 pm is stable at 800-1100 掳C. At higher ...