Synthese et etude de nouveaux arseniates (MI)3(NIII)2(AsO4)3 et de solutions solides (MI)3(NIII)2(AsO4)x(PO4)3−x (M = Li, Na; N = Fe, Sc, In, Cr)
作者:Jean-Marc Winand、André Rulmont、Pierre Tarte
DOI:10.1016/0022-4596(90)90068-9
日期:1990.7
New compounds (MI)3(NIII)2(AsO4)3 (M = Li, Na; N = Cr, Fe, In, Sc) have been studied by X-ray powder diffraction, infrared and Raman spectroscopies, and ionic conductivity measurements. The powder diagram of Na3In2(AsO4)3 has not been indexed. Li3Cr2(AsO4)3 has a garnet structure, in which Li+ ions are eightfold coordinated. Na3Sc2(AsO4)3 is structurally related to γ-Na3Sc2(PO4)3 (hexagonal Nasicon-like
通过X射线粉末衍射,红外和拉曼光谱研究了新化合物(M I)3(N III)2(AsO 4)3(M = Li,Na; N = Cr,Fe,In,Sc)。离子电导率测量。Na 3 In 2(AsO 4)3的粉末图尚未编制索引。Li 3 Cr 2(AsO 4)3具有石榴石结构,其中Li +离子具有八重配位。Na 3 Sc 2(ASO 4)3在结构上与γ-的Na 3钪2(PO 4)3(六方钠超离子导体状结构),而这三种化合物栗3(铁,在,SC)2(ASO 4)3在结构上与单斜晶Fe 2(SO 4)3。这两个结构是相关的,但要完全不同以禁止固溶。Li 3(Fe,In,Sc)2(AsO 4)3和Na 3 Sc 2(AsO 4)3与相应的磷酸盐形成连续的固溶体。在Li 3(Fe,In,Sc)2(AsO 4)x(PO 4)3 - x固溶体中,离子电导率在x = 1或2附近达到最大值。因此,Li的电导率3钪2(ASO