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. 1999 Mar 30;96(7):3447–3454. doi: 10.1073/pnas.96.7.3447

Table 1.

Important Mn oxide minerals

Mineral Chemical formula Reference
Pyrolusite MnO2 56
Ramsdellite MnO2 57
Nsutite Mn(O,OH)2 58
Hollandite Bax(Mn4+,Mn3+)8O16 51
Cryptomelane Kx(Mn4+,Mn3+)8O16 51
Manjiroite Nax(Mn4+,Mn3+)8O16 59
Coronadite Pbx(Mn4+,Mn3+)8O16 60
Romanechite Ba.66(Mn4+,Mn3+)5O10·1.34H2O 52
Todorokite (Ca,Na,K)X(Mn4+,Mn3+)6O12⋅3.5H2O 48
Lithiophorite LiAl2(Mn24+Mn3+)O6(OH)6 61
Chalcophanite ZnMn3O7⋅3H2O 62
Birnessite (Na,Ca)Mn7O14⋅2.8H2O 49
Vernadite MnO2⋅nH2O 63
Manganite MnOOH 64
Groutite MnOOH 65
Feitknechtite MnOOH 66
Hausmannite Mn2+Mn23+O4 67
Bixbyite Mn2O3 68
Pyrochroite Mn(OH)2 66
Manganosite MnO 69