The stilpnomelane group includes:
lennilenapeite:
K7(Mg,Mn2+,Fe2+,Zn)48(Si,Al)72(O,OH)216.16H2O
parsettensite:
(K,Na,Ca)7.5(Mn,Mg)49Si72O168(OH)50.nH2O
stilpnomelane:
(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36.nH2O
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