zussmaniten.
/ˈzʌsmənʌɪt/ Mineralogy.
A rhombohedral aluminosilicate of potassium, ferrous iron, and other metals, K(Fe2+,Mg,Mn)13(Si,Al)18O42(OH)14, found as pale green tabular crystals.
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the world > the earth > minerals > types of mineral > silicates > [noun] > others
fluosilicate1817
cummingtonite1824
steenstrupine1882
armenite1940
zussmanite1965
1965 S. O. Agrell et al. in Amer. Mineralogist 50 278 (heading) Deerite, howieite and zussmanite, three new minerals from the Franciscan of the Laytonville district, Mendocino Co., California.
1980 Mineral. Mag. XLIII. 611/2 Zussmanite compositions at their most aluminium~rich become quasi-isochemical with stilpnomelane and in many rocks a back-reaction can be seen with a fine~grained stilpnomelane fuzz (brown in colour) developing along cracks in the zussmanite.
This entry has not yet been fully updated (first published 1986; most recently modified version published online June 2018).
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n.1965