A general synthetic procedure for heteropolyniobates

被引：303

作者：

Nyman, M ^{[1
]}

Bonhomme, F ^{[1
]}

Alam, TM ^{[1
]}

Rodriguez, MA ^{[1
]}

Cherry, BR ^{[1
]}

Krumhansl, JL ^{[1
]}

Nenoff, TM ^{[1
]}

Sattler, AM ^{[1
]}

机构：

[1] Sandia Natl Labs, Albuquerque, NM 87185 USA

来源：

SCIENCE | 2002年 / 297卷 / 5583期

关键词：

D O I：

10.1126/science.1073979

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The heteropolyanions of W, Mo, and V, which have found numerous applications, are formed simply by acidification of solutions of their oxoanions. Under similar conditions, these oxoanion precursors are not available for Nb, and Nb-oxo chemistry is dominated by formation of the Lindquist ion [Nb6O19](8-) only. However, heteropolyniobate formation is favored in hydrothermal reactions of aqueous, alkaline precursor mixtures. Here we give two examples of heteropolyniobates formed by this general reaction type: K-12[Ti2O2] [SiNb12O40].16H(2)O [1], which contains chains of silicododecaniobate Keggin ions, and Na-14[H2Si4Nb16O56].45.5H(2)O [2], a new heteropolyanion structure type.

引用

页码：996 / 998

页数：3

共 22 条

[1] BOND-VALENCE PARAMETERS FOR SOLIDS [J].