Die Kristallstruktur von monoklinem Siliziumphosphat SiP2O7AIII: eine Phase mit [Si06]‐Oktaedern

Die Kristallstruktur von monoklinem Siliziumphosphat SiP2O7AIII: eine Phase mit [Si06]‐Oktaedern
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单晶硅磷酸盐 SiP2O7AIII 的晶体结构:[Si06]-Oktaedern 的单相

DOI:
10.1107/s0567740870002200
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发表时间:
1970
期刊:
Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry
影响因子:
--
通讯作者:
F. Liebau
F. Liebau
中科院分区:
--
文献类型:
--
作者:
G. Bissert;F. Liebau

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SiP207(AIII 变体)在空间群 P21/c 中结晶,晶胞中有四个分子式单元,尺寸为 a= 4.73、b= 6.33、c= 14.71/~、//= 90.1。通过三维X射线分析确定晶体结构,最终R指数为0.07。两个POa-四面体几乎对称地(对称面)连接,形成交错的P207基团,POP角为139-2。到桥氧原子和末端氧原子的平均PO键长分别为1.589和1.506/~。轻微变形的 SiO6 四面体的平均 Si-O 距离为 1.763/~。
SiP207 (AIII modification) crystallizes in space group P21/c with four formula units in the cell with the dimensions a= 4.73, b= 6.33, c= 14.71/~,//= 90.1. The crystal structure has been determined by three-dimensional X-ray analysis, the final R index being 0.07. Two POa-tetrahedra are linked almost symmetrically (plane of symmetry) forming a staggered P207 group with a POP angle of 139-2. The averaged PO bond lengths to the bridge oxygen atom and to the terminal oxygen atoms are 1.589 and 1.506/~ respectively. The average Si-O distance of a slightly deformed SiO6-tetrahedron is 1.763/~.