woodruffiten.
/ˈwʊdrʌfʌɪt/ Mineralogy.
A hydrated oxide of zinc and manganese, (Zn,Mn4+3)Mn4+O7.1–2H2O, found as black or grey monoclinic crystals.
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the world > the earth > minerals > types of mineral > oxides and hydroxides > [noun] > other oxides > oxides of two elements > hydrous or hydrated
humboldtine1822
ranciéite1861
curite1922
hydrohetaerolite1928
weddellite1942
vandendriesscheite1947
woodruffite1953
1953 C. Frondel in Amer. Mineralogist 38 769 The name woodruffite is proposed for this species after Samuel Woodruff (deceased), for many years employed as a miner by the New Jersey Zinc Company.
1979 Amer. Mineralogist 64 1214/1 The spectrum of woodruffite shows it to be a structural analog of todorokite, as has been assumed from the similarity of their X-ray powder patterns.
This entry has not yet been fully updated (first published 1986; most recently modified version published online June 2018).
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