zussmanitehttp://www.oed.com/dictionary/zussmanite_n%3Ftab%3Dmeaning_and_usezussmanite, n.
First published 1986; not fully revised

zussmanitenoun

Mineralogy.
  1. 1965–
    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.
    1. 1965
      Deerite, howieite and zussmanite, three new minerals from the Franciscan of the Laytonville district, Mendocino Co., California.
      S. O. Agrell et al. in American Mineralogist vol. 50 278 (heading)
    2. 1980
      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.
      Mineralogy Magazine vol. XLIII. 611/2

zussmanite, n. was first published in 1986; not fully revised.

zussmanite, n. was last modified in December 2024.