The new compound KMgPO4has been synthesized, and its structure has been determined at room-temperature (αform): space group isP21/c(No. 14) with cell parametersa=8.549(2) Å,b=5.078(1) Å,c=18.996(2) Å,β=91.68(1)°, andZ=8. Phase transitions occur at 362 and 422°C,β-KMgPO4andγ-KMgPO4are orthorhombic, respectivelyPna21(No. 33) andPnma(No. 62). Theβandγforms are related to the tridymite type, with a skeleton
新化合物KMgPO 4已被合成,并且其结构已经在室温(被确定α形式):空间群为P 2 1 / ç(第14号),晶胞参数一个= 8.549(2)埃,b = 5.078(1)埃,c ^ = 18.996(2)埃,β = 91.68(1)°,并ž = 8。相变发生在362和422℃,β -KMgPO 4和γ -KMgPO 4分别是斜方晶系,
PNA 2 1(第33号)和晶
PNma(第62号)。在β和γ形式与鳞石英类型有关,具有由MgO 4和PO 4四面体制成的骨架,但在α形式中,一半的
镁原子是五配位的。