Thermochemistry of Framework and Layer Manganese Dioxide Related Phases

Sophie Fritsch, Jeffrey E. Post, Steven L. Suib, Alexandra Navrotsky

Research output: Contribution to journalArticlepeer-review

39 Scopus citations

Abstract

The energetics of a set of natural and synthetic manganese dioxides having a framework or a layer structure were determined by high-temperature solution calorimetry using sodium molybdate as a solvent. Enthalpies of formation of the metastable manganese dioxides were calculated from the measured values of the enthalpies of drop solution. The stability of the open structure depends mostly on the nature of and the amount of the tunnel (or interlayer) cation and on the degree of hydration. It depends less strongly on the topology of the structure itself and on the average oxidation state of manganese. The synthesis of these metastable microporous materials is not limited by the energetics of the structure.

Original languageEnglish (US)
Pages (from-to)474-479
Number of pages6
JournalChemistry of Materials
Volume10
Issue number2
DOIs
StatePublished - Feb 1998
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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