Enthalpies of formation of cds xse 1-x solid solutions

Fen Xu, Xuchu Ma, Susan M. Kauzlarich, Alexandra Navrotsky

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


The enthalpies of oxidative drop solution (AH ds) for a series of CdS xSe 1-xsamples were obtained by calorimetry in molten 3Na 20-4MoO 3 at 975 K. They become more exothermic linearly with increasing S content. The enthalpies of formation from the elements (AH f,el) depend linearly on molar ratio of S/(S + Se). This is the first report of thermodynamic properties of CdS xSe 1-x solid solutions measured by any direct calorimetric method. The enthalpies of formation at 298 K from the binary chalcogenide end-members (△H f,cdm) (M = S, Se) for wurtzite CdS xSe 1-x are found to be zero within experimental errors. These results strongly suggest that wurtzite CdS and CdSe form an ideal solid solution, despite a substantial difference in molar volume and anion radius. This implies that size difference affects thermodynamics less strongly when larger and more polarizable anions are mixed in chalcogenides than when cations are mixed in oxides.

Original languageEnglish (US)
Pages (from-to)1368-1374
Number of pages7
JournalJournal of Materials Research
Issue number4
StatePublished - Apr 2009
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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