Hollandite

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
Hollandite
Hollandite-171530.jpg
General
Category Oxide minerals
Formula
(repeating unit)
Ba(Mn4+6Mn3+2)O16
Strunz classification 4.DK.05a
Dana classification 7.9.1.1
Crystal system Monoclinic
Crystal class Prismatic (2/m)
Space group Monoclinic
H-M symbol: (2/m)
Space group: I2/m
Identification
Color Silvery-grey to greyish
Cleavage Distinct / Good, Prismatic
Mohs scale hardness 4 to 6
Density 4.95[1]

Hollandite (chemical formula: Ba(Mn4+6Mn3+2)O16) is an oxide mineral. It is the barium-manganese (III) endmember of the coronadite group.[1]

A mineral, with the chemical composition BaMn4+6Fe3+2O16,[2] that was first found in the Kajlidongri mine in the Jhabua district of Madhya Pradesh, India,[3] had the name hollandite until it was reclassified as ferrihollandite by the International Mineralogical Association in 2012. Ferrihollandite is the barium-iron (III) endmember of the coronadite group.[1]

See also[edit]

References[edit]