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