A NIOBIUM PHOSPHATE BRONZE CLOSELY RELATED TO THE TUNGSTEN PHOSPHATE BRONZES FAMILY - NA4NB8P6O35

被引：15

作者：

BENABBAS, A ^{[1
]}

BOREL, MM ^{[1
]}

GRANDIN, A ^{[1
]}

LECLAIRE, A ^{[1
]}

RAVEAU, B ^{[1
]}

机构：

[1] UNIV CAEN,INST SCI MAT & RAYONNEMENT,CNRS,CRISTALLOG & SCI MAT LAB,F-14032 CAEN,FRANCE

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 1990年 / 89卷 / 01期

关键词：

D O I：

10.1016/0022-4596(90)90295-9

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A new niobium phosphate bronze Na4Nb8P6O35 has been isolated. Its structure was solved by single crystal X-ray diffraction. It crystallizes in the orthorhombic system with the space group Pbam. The cell parameters are a = 8.4992(7) Å, b = 15.3390(8) Å, and c = 10.5913(9) Å. The framework [Nb8P6O35]∞ consists of [Nb3P2O17]∞ layers, sharing the corners of their octahedra and forming [Nb6P4O31]∞ bilayers. The latter bilayers are linked along c through [Nb2P2O14] units, built up themselves of two edge-sharing NbO6 octahedra connected to two PO4 tetrahedra. The [Nb3P2O17]∞ layers are very closely related to the structure of the diphosphate tungsten bronzes with pentagonal tunnels (DPTBp's) and can be described as derived from the m = 3 member of the series (PO2)4(WO3)2m. The relationships with other niobium phosphate bronzes is also discussed as well as the great distortion of the different polyhedra of the structure. © 1990.

引用

页码：75 / 82

页数：8

共 14 条

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