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Published November 24, 1967 | public
Journal Article

Staurolite: Sectoral Compositional Variations

Abstract

Electron-microprobe analyses across six successive sections of a single staurolite crystal show that the staurolite has three crystallographically controlled sectors, each with a distinctive content of Al, Si, Ti, Fe, Mg, and Mn. The sector distribution of elements raises the question of whether the staurolite acts as one or several phases during growth. Total analyses of the separate sectors suggest that: (i) the staurolite has tetrahedral Al substitution for Si, and (ii) the hydroxyl content varies between sectors.

Additional Information

© 1967 American Association for the Advancement of Science. Received 12 October 1967. Supported by NSF grants GP-2773 and GP-3570 to A. L. Albee (California Institute of Technology) and an Academic Senate Research Grant from the University of California, Los Angeles. We thank J. L. Rosenfeld (University of California, Los Angeles) for stimulating disct1ssions of processes of crystal growth and A. L. Albee (California Institute of Technology, Pasadena) and W. G. Ernst (University of California, Los Angeles) for criticism of the manuscript. Arthur Chodos and Arden Albee (California Institute of Technology) assisted with the analyses and computations. John de Grosse (University of California, Los Angeles) prepared the serial thin sections.

Additional details

Created:
August 19, 2023
Modified:
October 25, 2023