Structure of a Y1−x(Gd,Dy,Er)xPO4.2H2O microcrystal using synchrotron radiation
Structure of a Y1−x(Gd,Dy,Er)xPO4.2H2O microcrystal using synchrotron radiation
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使用同步辐射的 Y1−x(Gd,Dy,Er)xPO4.2H2O 微晶结构
DOI：
10.1107/s0108270194000806
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
W. Abriel
中科院分区：
文献类型：
--
作者：
M. Kohlmann;H. Sowa;K. Reithmayer;H. Schulz;R.;W. Abriel
证实了标题化合物weinschenkite[教堂石(Y)]的石膏型结构。h原子的位置无法确定。石膏的结构[Cole & Lancucki(1974)]。Acta结晶。[j]; CaSeO [j]；[qh] [Kruger & Abriel(1991)]。Acta结晶。[47]和weinschenkite是等型的。然而，这些相的脱水温度是不同的，并且可以与氢键的强度相关。水O和磷酸O原子之间的最小距离被认为是这种强度的量度。从石膏（2.856 A）到CaSeO 4，氢键的平均长度随着脱水温度的升高而减小。2h2o （2.845 A）和weinschenkite (2.726 A)；因此氢键的强度增加了
The gypsum-type structure of the title compound, weinschenkite [churchite(Y)], is confirmed. The H-atom positions could not be located. The structures of gypsum [Cole & Lancucki (1974). Acta Cryst. B30, 921929], CaSeO 4 . 2H 2 O [Kruger & Abriel (1991). Acta Cryst. C47, 1958-1959] and weinschenkite are isotypic. However, the temperature of dehydration of these phases is different and can be correlated to the strength of the hydrogen bonds. The minimum distance between water O and phosphate O atoms is considered to be a measure of this strength. The mean length of the hydrogen bonds decreases with increasing temperature of dehydration, from gypsum (2.856 A) to CaSeO 4 . 2H 2 O (2.845 A) and weinschenkite (2.726 A); hence the strength of the hydrogen bonds increases