gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1989.053.371.18 Mineralogical Notes Frohbergite from the Kobetsuzawa Mine, Sapporo, Hokkaido, Japan Nakata M. Honma H. Department of Astronomy and Earth Science, Tokyo Gakugei University, Koganei-shi, Tokyo 184, Japan Chung J. I. Department of Geology, College of Natural Science, Chonbug University, Chollabuk-do, Korea Sakurai K. Sakurai Museum, Hirakawa-cho, Chiyoda-ku, Tokyo 105, Japan 6 1989 53 371 387 388 23 3 1988 10 6 1988 Copyright © 1989, The Mineralogical Society 1989 frohbergite Fe-Te system Kobetsuzawa mine Hokkaido