The crystal structure of Yb2(SO4)3•3H2O and its decomposition product, β-Yb2(SO4)3
The crystal structure of Yb2(SO4)3•3H2O and its decomposition product, β-Yb2(SO4)3
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DOI：
10.1016/j.jssc.2011.06.018
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发表时间：
2011-09-01
影响因子：
3.3
通讯作者：
Raudsepp, Mati
中科院分区：
文献类型：
--
作者：
Mills, Stuart J.;Petricek, Vaclav;Raudsepp, Mati
用单晶X射线衍射法研究了220(2)℃水热法合成的YB-2(SO4)(3)心点~(3)H(2)O。Yb-2(SO4)(3)中心点~3H(2)O在Cmc2(1)空间群中结晶，与Lu-2(SO_4)(3)中心点~(3)H(2)O同构，其晶体结构被细化到R-1=0.0145[F-O>；3sigma(F)]。对于全部3,472次反射，为0.0150。Yb-2(SO4)(3)中心点3 H(2)O是由YbO6八面体、YbO8和YbO5(H2O)(3)多面体和SO4四面体组成的络合物骨架。热数据表明，Yb-2(SO4)(3)中心点~(3)H(2)O在120~190℃之间分解形成β-Yb-2(SO4)(3)。对孪晶β-Yb-2(SO4)(3)的结构用R3c中的放大模精算法进行了求解和精化，对于8944个反射，R-1=0.0755[F-o>；3 sigma(F)]，对于所有16,361个反射，R-1=0.1483。β-Yb-2(SO4)(3)具有基于风车3D网络的独特结构拓扑。(C)2011 Elsevier Inc.保留所有权利。
Yb-2(SO4)(3)center dot 3H(2)O, synthesised by hydrothermal methods at 220(2) degrees C, has been investigated by single crystal X-ray diffraction. Yb-2(SO4)(3)center dot 3H(2)O crystallises in space group Cmc2(1) and is isostructural with Lu-2(SO4)(3)center dot 3H(2)O. The crystal structure has been refined to R-1=0.0145 for 3412 reflections [F-o > 3 sigma(F)]. and 0.0150 for all 3472 reflections. The structure of Yb-2(SO4)(3)center dot 3H(2)O is a complex framework of YbO6 octahedra, YbO8 and YbO5(H2O)(3) polyhedra and SO4 tetrahedra. Thermal data shows that Yb-2(SO4)(3)center dot 3H(2)O decomposes between 120 and 190 degrees C to form beta-Yb-2(SO4)(3). The structure of a twinned crystal of beta-Yb-2(SO4)(3) was solved and refined using an amplimode refinement in R3c with an R-1=0.0755 for 8944 reflections [F-o > 3 sigma(F)], and 0.1483 for all 16,361 reflections. beta-Yb-2(SO4)(3) has a unique structural topology based on a 3D network of pinwheels. (C) 2011 Elsevier Inc. All rights reserved.