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The Hydrothermal NH4/V/P/H2O and K/V/P/N(C2H5)3/H2O Systems at 473 K and the Crystal Structures of NH4VOPO4and (NH4)3V2O3(VO)(PO4)2(HPO4)

✍ Scribed by Michael Schindler; Werner Joswig; Werner H. Baur

Publisher: Elsevier Science
Year: 1997
Tongue: English
Weight: 333 KB
Volume: 134
Category: Article
ISSN: 0022-4596
DOI: 10.1006/jssc.1997.7558

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✦ Synopsis

4؉

, and As 5؉ , but none of them crystallize in space group Pn2n. In the K/V/P/N(C 2 H 5 ) 3 / H 2 O system, three different K phases were found: K 0.5 VOPO 4 • 1.5H 2 O, KVOPO 4 , and K-FVP-1 (Frankfurt vanadium phosphate, one, or for short, FVP-1). The microporous K-FVP-1 compound was synthesized in a similar pH range as the isotypic Na-FVP-1 phase. The V 4؉ / V 5؉ ratio of K-FVP-1 varies from 3.5(1)/1.5(1) to 1.6(1)/3.4(1) and the corresponding lattice constants range from 16.0013(6) to 15.7665(4) A s .

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