Formation of salts of heteropolyacids in nitrate melts

Author:

Drátovský Milan,Havlíček David

Abstract

The acid-base reaction between Na2MoO4 + Na4As2O7 as Lux bases dissolved in an NaNO3 + KNO3 melt and an NO2 + O2 gas mixture as a Lux acid gave a novel heteropolyacid salt whose composition is approximately (Na, K)18As2Mo17O65, (Na, K)16As2Mo18O56, (Na, K)16As2Mo17O64. This compound can also be obtained by direct fusion of the components (Na4As2O7, Na2MoO4 and MoO3) over the temperature region of 420-600 °C. Based on the study of the arsenate and diarsenate ions in a nitrate melt and the molecular spectra of the compound obtained it is suggested that the basic unit of the heteropolyanion structure is the diarsenate anion. The formation of analogous compounds can generally be expected for X/Z combinations with X = P(V), As(V), V(V) and Z = Mo(VI), W(VI).

Publisher

Institute of Organic Chemistry & Biochemistry

Subject

General Chemistry

Cited by 6 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. NIST–JANAF Thermochemical Tables for the Iodine Oxides;Journal of Physical and Chemical Reference Data;1996-09

2. The structure of the compounds Na24As2Z22O83 and its relationship to the structure of Na2Z2O7 (Z = Mo, W);Collection of Czechoslovak Chemical Communications;1989

3. The formation of single crystals of the salts of heteropolyacids in the fused salt;Collection of Czechoslovak Chemical Communications;1987

4. The formation of fluorooxogermanates in alkali metal nitrate melts;Collection of Czechoslovak Chemical Communications;1987

5. The preparation of the salts of heteropolyacids by tempering a mixture of the solid components;Collection of Czechoslovak Chemical Communications;1987

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