Hydrothermal Synthesis, Structural Characterization, and Physical Properties of a New Mixed Valence Iron Phosphate, SrFe3(PO4)3
作者:Michael B. Korzenski、Joseph W. Kolis、Gary J. Long
DOI:10.1006/jssc.1999.8392
日期:1999.10
A new mixed valence Fe(II/III) phosphate, SrFe3(PO4)3, has been synthesized hydrothermally and structurally characterized by single-crystal X-ray diffraction, EDAX, magnetic susceptibility, Mössbauer, infrared and diffuse reflectance spectroscopies, DTA, and bond valence sum calculations. The compound crystallizes in the orthorhombic space group Imma (No. 74) with a=10.452(3), b=13.429(3), c=6.528(2)
通过单晶X射线衍射,EDAX,磁化率,Mössbauer,红外和漫反射光谱,DTA等水热合成和结构表征了一种新的混合价化Fe(II / III)磷酸铁(SrFe 3(PO 4)3)。,以及键合价之和的计算。化合物正交晶空间群我MMA(74号)与一个= 10.452(3),b = 13.429(3),C ^ = 6.528(2)埃,V = 916.3(4)3和ž = 4带有R / R w= 0.0207 / 0.0307。该结构由FeO 6八面体和PO 4四面体构成的复杂低维框架构成,形成了锶离子所在的2D通道。该框架包含两个简单的构建块:边缘共享的Fe 2 P 2 O 14单位的刚性圆柱和交替的PO 4 -FeO 6 -PO 4单位的锯齿形链,它们均平行于b方向延伸。这种连接形成相交的通道,这些通道平行于a和b轴延伸。二价锶阳离子位于这些通道内,并在ab平面,尺寸分别为6.903(4)和7