Thermodynamic study of some chromium-containing gaseous molecules by high-temperature mass spectrometry.
A number of gaseous oxyacid salts have been identified by Knudsen effusion mass spectrometry, while vaporizing Cr(2)O(3) and mixtures of Cr(2)O(3)+Nb(2)O(5), Cr(2)O(3)+Ta(2)O(5), Cr(2)O(3)+BaO, and Cr(2)O(3)+Mg(2)P(2)O(7) from molybdenum and tungsten cells. The stabilities of the gaseous molecules CrMoO(3), CrMoO(4), CrMoO(5), CrWO(3), CrWO(4), CrWO(5), CrNbO(3), CrTaO(3), CrPO(2), CrPO(3), BaCrO(2) and BaCrO(3) were deduced from the measurements. The thermodynamic properties of this gaseous chromium-containing species are summarized. Prediction is tentatively made of the stability of as-yet unstudied gaseous molecules.
Lopatin
S I
SI
Department of Chemistry, St. Petersburg State University, 198504 St. Petersburg, Russia. slop@SL1862.spb.edu
Shugurov
S M
SM
Semenov
G A
GA
D017608:Chromium Compounds / Q000032:analysis* / Q000737:chemistry*; D004735:Energy Transfer; D005740:Gases / Q000032:analysis* / Q000737:chemistry*; D006358:Hot Temperature; D013058:Mass Spectrometry / Q000379:methods*; D044367:Phase Transition; D013816:Thermodynamics
D017608:Chromium Compounds; D005740:Gases