Preparative Inorganic Chemistry
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ChemInform Abstract: Influence of Sodium Fluoride on the Reaction of Chromium(III) Oxide with Na2O-P2O5 Melts.
First published: February 7, 1989
Abstract
The reactions between Cr2O3 and sodium phosphates are studied in the liquid phase at 800-1050 °C in the presence and in the absence of NaF.
ChemInform Abstract
The reactions between Cr2O3 and sodium phosphates are studied in the liquid phase at 800-1050 °C in the presence and in the absence of NaF. The starting compounds are anhydrous NaPO3, Na4P2O7 and Na2P4O11 and the ratios chosen for Na2O:P2O5 vary between 1:1.9 and 1.7:1. As a result of these studies the sodium-chromium double phosphates NaCrP2O7, Na3Cr2(PO4)3 and Na2(CrO)2P2O7 and the fluorophosphates NaCrPO4F, Na2CrP2O7F and NaCr2(PO4)2F3 are isolated. They are characterized, inter alia, by their IR spectra.
