Ionicity and phase transitions at negative pressures

A. Navrotsky, J. C. Phillips

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


The Gibbs-free-energy difference ΔGt which determines the phase transition from fourfold to sixfold coordination in ANB8-N compounds is presented for three compounds (CdO, MgO, and AgBr) which are stable at STP in the more-dense (NaCl) structure. The additional data follow a linear trend in spectroscopic ionicity predicted previously from high-pressure data on compounds stable in fourfold coordinated structures. These data resolve ambiguities concerning the proper definition of ionic character in partially covalent compounds with the NaCl structure.

Original languageEnglish (US)
Pages (from-to)1583-1586
Number of pages4
JournalPhysical Review B
Issue number4
StatePublished - 1975

ASJC Scopus subject areas

  • Condensed Matter Physics


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