gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1985.049.353.18 Short Communications Greenalite, Mg-Rich Minnesotaite and Stilpnomelane from the Ösjöberg and Sirsjöberg Iron-Ore Mines, Hjulsjö, W. Bergslagen, Sweden Baker J. H. Geologisch Instituut, Universiteit van Amsterdam, Nwe. Prinsengracht 130, 1018 VZ Amsterdam, The Netherlands 9 1985 49 353 611 613 26 5 1984 13 10 1984 Copyright © 1985, The Mineralogical Society 1985 greenalite minnesotaite stilpnomelane Bergslagen Sweden