Thermogravimetric study of MHgO2(M=Ca, Sr, Ba) under controlled oxygen and mercury partial pressures and related thermodynamics

D. A. Mikhailova, V. A. Alyoshin, E. V. Antipov, J. Karpinski

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10 Citations (Scopus)

Abstract

A novel method of thermogravimetry under controlled mercury and oxygen partial pressures was developed, which allowed us to obtain the precise thermodynamical data for the equilibrium MHgO2(S) ⇔ MO(s)+Hg(v)+1/2O2 (M=Ca, Sr, and Ba). Temperature dependencies of equilibrium constants Kp are described by the equations: log Kp(CaHgO2)=-(9424 ± 540)/ T+(10.28±0.57), (888-1013 K); log Kp(SrHgO2)=-(10197 ± 890)/T + (10.10±0.83), (1043-1118 K); 10gKp(BaHgO2)= -(10474±730)/T+(9.94 ±0.64), (1098-1163 K). Thermal stability of mercurates increases in the order CaHgO2, SrHgO2, BaHgO2.

Original languageEnglish
Pages (from-to)151-156
Number of pages6
JournalJournal of Solid State Chemistry
Volume146
Issue number1
DOIs
Publication statusPublished - Aug 1999
Externally publishedYes

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