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Mineral contains: Numanoite
Ohnishi M, Kusachi I, Kobayashi S, Yamakawa J (2006) Numanoite, Ca4CuB4O6(OH)6(CO3)2, a new mineral, the Cu-analogue of borcarite from the Fuka mine, Okayama Prefecture, Japan. 19th General Meeting of the International Mineralogical Association, Kobe, Japan 19, P31.01-P31.01
Ohnishi M, Kusachi I, Kobayashi S, Yamakawa J, Tanabe M, Kishi S, Yasuda T (2007) Numanoite, Ca4CuB4O6(OH)6(CO3)2, a new mineral species, the Cu analogue of borcarite from the Fuka mine, Okayama Prefecture, Japan. The Canadian Mineralogist 45, 307-315
Poirier G, Piilonen P C (2007) New mineral names. American Mineralogist 92, 1776-1779