Contributions to Mineralogy and Petrology

, Volume 119, Issue 4, pp 433–440 | Cite as

Mixing properties and stability of jadeite-acmite pyroxene in the presence of albite and quartz

  • Jun Liu
  • Steven R. Bohlen


The stability of synthetic jadeite-acmite pyroxene coexisting with albite and quartz has been determined at 600, 700, and 900° C. The end-member reaction: albite = jadeite + quartz has been determined to lie between 1.67 and 1.70 GPa at 600° C, 1.88 and 1.90 GPa at 700° C, and 2.44 and 2.48 GPa at 900° C. Jd78Acm22 + quartz is stable above 1.58, 1.78, and 2.33 GPa at 600, 700, and 900° C, respectively. Jd61Acm39 + quartz is stable above 1.47, 1.67, and 2.18 GPa at 600, 700, and 900° C, respectively. Addition of as much as 40% of acmite component in jadeite extends pyroxene stability by less than 300 MPa at 900° C. Unit-cell parameters measured for synthetic jadeite-acmite pyroxenes indicate linear volume-composition relations. The data are consistent with ideal mixing in jadeite-acmite solutions.


Quartz Mineral Resource Acmite Component 
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Copyright information

© Springer-Verlag 1995

Authors and Affiliations

  • Jun Liu
    • 1
  • Steven R. Bohlen
    • 2
  1. 1.Department of Geological and Environmental SciencesStanford UniversityStanfordUSA
  2. 2.U.S. Geological SurveyMenlo ParkUSA

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