Magnetic ordering transition in Mg0.9Fe0.1SiO3 orthopyroxene

M. P. Pasternak, R. D. Taylor, R. Jeanloz, S. R. Bohlen

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


Mossbauer spectroscopy of polycrystalline synthetic orthopyroxene of composition Mg0.9 57Fe0.1SiO3 demonstrates that magnetic ordering sets in at temperatures below 5 (±2) K. The low Fe concentration of the sample implies that spin correlations must extend over unit-cell dimensions (~0.5 nm or more), and that magnetic ordering can contribute to the third-law entropies of Fe-poor minerals. -Authors

Original languageEnglish
Pages (from-to)901-903
Number of pages3
JournalAmerican Mineralogist
Issue number9-10
StatePublished - 1992
Externally publishedYes


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