Crystal-chemical aspects of nonstoichiometric pyroxenes

  • NrsrN C. McConurcr
  • Published 2007


Unit-cell parameters were determined for twelve mantle omphacites, at least eight of which are nonstoichiometric. The a and b cell dimensions and unit-cell volumes for the nonstoichiometric pyroxenes are consistently lower than would be expected for an ideal jadeite-diopside solution. Extrapolation to the Ca-Eskola endmember (Ca"rtrorAlsiro6) indicates a… (More)

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