Sr2Ga(HPO4)(PO4)F2和Sr2Fe2(HPO4)(PO4)2F2两种不同无限片的氟磷酸盐化合物的合成和晶体结构

J.-M. Le Meins, A. Hemon-Ribaud, G. Courbion
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引用次数: 8

摘要

采用水热法(700℃,180 MPa, 24 h)制备了新化合物Sr2Ga(HPO4)(PO4)F2和Sr2Fe2(HPO4)(PO4)2F2,并用x射线单晶衍射对其进行了表征。Sr2Ga(HPO4)(PO4)F2在单斜空间群P21/n中结晶,a = 8.257(1) Å, b = 7.205(1) Å, c = 13.596(2) Å, β = 108.02(1)°,V = 769.2(2) Å3, Z = 4; Sr2Fe2(HPO4)(PO4)2F2在三斜空间群P21/n中结晶,a = 8.072(1) Å, b = 8.794(1) Å, c = 8.885(1) Å, α = 102.46(1)°,β = 115.95(1)°,γ = 89.95(1)°,V = 550.6(1) Å3, Z = 2。结构都是基于不同的薄片,包括八面体和四面体之间的角连接。薄片由Sr2+阳离子连接。脱云母矿物与标题化合物之间存在结构关系。
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Synthesis and crystal structure of two fluorophosphated compounds with different infinite sheets: Sr2Ga(HPO4)(PO4)F2 and Sr2Fe2(HPO4)(PO4)2F2

New compounds, Sr2Ga(HPO4)(PO4)F2 and Sr2Fe2(HPO4)(PO4)2F2, have been prepared by hydrothermal synthesis (700°C, 180 MPa, 24 h) and characterized by single-crystal X-ray diffraction. Sr2Ga(HPO4)(PO4)F2 crystallizes in the monoclinic space group P21/n with a = 8.257(1) Å, b = 7.205(1) Å, c = 13.596(2) Å, β = 108.02(1)°, V = 769.2(2) Å3 and Z = 4 and Sr2Fe2(HPO4)(PO4)2F2 in the triclinic space group P21/n with a = 8.072(1) Å, b = 8.794(1) Å, c = 8.885(1) Å, α = 102.46(1)°, β = 115.95(1)°, γ = 89.95(1)°, V = 550.6(1) Å3 and Z = 2. Structures are both based on different sheets involving corner-linkage between octahedra and tetrahedra. The sheets are linked by Sr2+ cations. Structural relationships exist between the descloizite mineral and the title compounds.

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