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Mineral contains: ungemachite
Bandy M C (1938) Mineralogy of three sulphate deposits of Northern Chile. American Mineralogist 23, 669-760
Groat L A, Hawthorne F C (1986) Structure of ungemachite, K3Na8Fe3+(SO4)6(NO3)2·6H2O. American Mineralogist 71, 826-829
Peacock M A, Bandy M C (1938) Ungemachite and clino-ungemachite: new minerals from Chile. American Mineralogist 23, 314-328
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