Department of Chemistry, Clemson University, Clemson, South Carolina 29634-0973, United States.
Inorg Chem. 2011 Nov 21;50(22):11825-31. doi: 10.1021/ic2019555. Epub 2011 Oct 27.
Two new cesium thorium fluorides and three new rubidium thorium fluorides have been synthesized hydrothermally and structurally characterized. The structures of two polymorphs of CsTh(3)F(13) are described in space group P6/mmm with a = 8.2608(14) and c = 8.6519(17) and space group Pmc2(1) with a = 8.1830(16), b = 7.5780(15), and c = 8.6244(17). The analogous orthorhombic compound RbTh(3)F(13), with a = 8.1805(16), b = 7.4378(15), and c = 8.6594(17) in space group Pmc2(1), is also reported. Two other rubidium thorium fluorides are also described: RbTh(2)F(9) crystallizes in the space group Pnma where a = 8.9101(18), b = 11.829(2), and c = 7.4048(15), and Rb(7)Th(6)F(31) crystallizes in the space group R3 where a = 15.609(2) and c = 10.823(2). Comparison of these materials was made on the basis of their structures and synthesis conditions. The formation of these species in hydrothermal fluids appears to be dependent upon the concentration of the alkali fluoride mineralizer solution and, thus, the ratio of alkali ions to thorium in the system.
两种新的铯钍氟化物和三种新的铷钍氟化物已经通过水热法合成并进行了结构表征。两种 CsTh(3)F(13)多晶型物的结构在空间群 P6/mmm 中描述，a = 8.2608(14)，c = 8.6519(17)，在空间群 Pmc2(1)中描述，a = 8.1830(16)，b = 7.5780(15)，c = 8.6244(17)。类似的正交化合物 RbTh(3)F(13)，在空间群 Pmc2(1)中，a = 8.1805(16)，b = 7.4378(15)，c = 8.6594(17)，也有报道。还描述了另外两种铷钍氟化物：RbTh(2)F(9)在空间群 Pnma 中结晶，其中 a = 8.9101(18)，b = 11.829(2)，c = 7.4048(15)，和 Rb(7)Th(6)F(31)在空间群 R3 中结晶，其中 a = 15.609(2)，c = 10.823(2)。根据这些材料的结构和合成条件对它们进行了比较。这些物质在水热流体中的形成似乎取决于碱氟化物矿化剂溶液的浓度，因此取决于体系中碱离子与钍的比值。
