Boron in Sillimanite

Authors

Edward S. Grew, University of California, Los Angeles
James R. Hinthorne, Central Washington UniversityFollow

Document Type

Article

Department or Administrative Unit

Geological Sciences

Publication Date

8-5-1983

Abstract

Sillimanite in six granulite-facies, kornerupine-bearing rocks contains 0.035 to 0.43 percent B₂O₃ and 0.02 to 0.23 percent MgO (by weight). Substitution of boron for silicon and magnesium for aluminum is coupled such that the ratio of magnesium to boron is about 0.5. Sillimanite incorporates more than 0.1 percent B₂O₃ only at high temperatures in a boron-rich environment at very low partial pressures of water. In the amphibolite facies, the sillimanite boron contents are too low to appreciably affect the stability relations of sillimanite with kyanite and andalusite.

Comments

This article was originally published in Science. The full-text article from the publisher can be found here.

Due to copyright restrictions, this article is not available for free download from ScholarWorks @ CWU.

Recommended Citation

Grew, E. S., & Hinthorne, J. R. (1983). Boron in Sillimanite. Science, 221(4610), 547–549. https://doi.org/10.1126/science.221.4610.547

Journal

​Science

Rights

Copyright © 1983 by the American Association for the Advancement of Science.