Published January 1989 | Version v1
Journal article Metadata-only

Preparation of the free 12-tungstoaluminium acid H5[AlO4W12O36] · 6 H2O by means of the cryogenic method

Creators

  • 1. Humboldt-Universitaet, Berlin (German Democratic Republic). Sektion Chemie
  • 2. Akademie der Wissenschaften der DDR, Berlin (German Democratic Republic). Zentralinstitut fuer Anorganische Chemie

Description

The title compound was first prepared in solid state from its aqueous solution by means of the cryogenic method and characterized by chemical and thermal analyses, IR and UV spectroscopy. From X-ray heating patterns the formation of a new cubic phase 1/2 Al2O3 · 12 WO3(I) at 400 0C was found, being stable till 830 0C: a = 378 pm (600 0C). High-resolution 27Al NMR (MAS-technique) was used to determine the tetrahedral coordination of aluminium in the title compound and the octahedral coordination in I. The degradation of the doped WO3-phase I into Al2(WO4)3 begins at 600 0C. Above 8300C tetragonal WO3 and Al2(WO4)3 coexist. (author)

Additional details

Additional titles

Original title (German)
Darstellung der freien Dodekawolframatoaluminiumsaeure H

Publishing Information

Journal Title
Zeitschrift fuer Anorganische und Allgemeine Chemie
Journal Volume
568
Series
Z. Anorg. Allg. Chem.
Journal Page Range
171-177
ISSN
0044-2313
CODEN
ZAACA

INIS

Country of Publication
Germany
Country of Input or Organization
German Democratic Republic
INIS RN
21022810
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
ALUMINIUM COMPOUNDS; ALUMINIUM 27; CHEMICAL PREPARATION; DRYING; HETEROPOLYANIONS; INFRARED SPECTRA; INORGANIC ACIDS; NUCLEAR MAGNETIC RESONANCE; OXYGEN COMPOUNDS; REFRIGERATION; STRUCTURAL CHEMICAL ANALYSIS; THERMAL GRAVIMETRIC ANALYSIS; TUNGSTEN COMPOUNDS; ULTRAVIOLET SPECTRA; X-RAY DIFFRACTION
Descriptors DEC
ALUMINIUM ISOTOPES; ANIONS; CHARGED PARTICLES; CHEMICAL ANALYSIS; COHERENT SCATTERING; COMPLEXES; COOLING; DESTRUCTIVE ANALYSIS; DIFFRACTION; GRAVIMETRIC ANALYSIS; HYDROGEN COMPOUNDS; INORGANIC COMPOUNDS; IONS; ISOTOPES; LIGHT NUCLEI; MAGNETIC RESONANCE; NUCLEI; ODD-EVEN NUCLEI; QUANTITATIVE CHEMICAL ANALYSIS; RESONANCE; SCATTERING; SPECTRA; STABLE ISOTOPES; SYNTHESIS; THERMAL ANALYSIS; TRANSITION ELEMENT COMPOUNDS