Category Oxide mineral Strunz classification 4.FG.05 Space group Pman | Formula
(repeating unit) Mn5−x(Mn,Fe)1+xO8(OH)6 Crystal system Orthorhombic | |
Unit cell a = 9.324, b =14.05
c = 7.956 [Å], Z = 4 | ||
Janggunite is a rare manganese oxide mineral with formula Mn5−x(Mn,Fe)1+xO8(OH)6.
It was first described in 1975 for an occurrence in the Janggun mine, Bonghwa-gun, Gyeongsangbuk-do, South Korea and named for the locality.
References
Janggunite Wikipedia(Text) CC BY-SA