EDS spectrum & images

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Comments

This material is known to contain approximately 10% amphibole, probably grunerite, commonly associated with the fayalite from this locality. Some fayalite grains are intergrown with impurities. Other complex grains remain largely unstudied.

References

• Bowen, I. L. and Schairer, J. F. (1935) Grunerite from Rockport, Massachusetts and a Series of Synthetic Fluor- Amphiboles. Am. Min., 20, p. 543- 551
• Bozhilov, K. N. and Evans, B. W. (2001) Ferroanthophyllite in Rockport grunerite: A transmission electron microscopy study. Am. Min., 86, p. 1252- 1260
• Dyar, M. D. et. al. (1988) Fe3+ distribution in oxidized olivine: A Synchrontron micro-XANES study. Am. Min., 83, p. 1361-1365
• Jarosewich, E., Nelen, J. A., and Norberg, J. A. (1980) Reference Samples for Electron Microprobe Analysis. Geostandards Newsletter 4, p. 43-47
• Palache, C. (1950) Fayalite from Rockport, Mass. Am. J. Sci., 4th Ser, 1, p. 134-135
• Schaefer, M. W. (1985) Site occupancy and two-phase character of "ferrifayalite." Am. Min., 70, p. 729-736
• Warren, C. H. (1903) Anthophyllite with fayalite from Rockport. Am. J. of Sci., 16, p. 339.

Providers and purchase options

Smithsonian Institution
PO Box 37012
SI Building, Room 153, MRC 010
Washington, D.C. 20013-7012
USA
https://mineralsciences.si.edu/facilities/standards.htm
Material: mineral (size: Tiny grains mostly 50-100 µm)