Jump to content

Janggunite

From Wikipedia, the free encyclopedia

This is an old revision of this page, as edited by Soraepogu (talk | contribs) at 02:49, 1 September 2013. The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

Janggunite
General
CategoryOxide mineral
Formula
(repeating unit)		Mn5-x(Mn,Fe)1+xO8(OH)6
Strunz classification4.FG.05
Crystal systemOrthorhombic
Unit cella = 9.324Å, b =14.05Å, c = 7.956Å, Z = 4
Identification
Colorblack
CleavagePerfect,one direction
Mohs scale hardness2 - 3
LusterDull
Streakbrownish black to dark brown
Density3.59
References[1][2][3]

Janggunite is a rare Manganese oxide mineral with formula Mn5-x(Mn,Fe)1+xO8(OH)6

It was first described in 1976 for an occurrence in the Janggun mine, Bonghwa-gun, Gyeongsangbuk-do, South Korea and named for the locality.[2]

References

  1. ^ Handbook of Mineralogy
  2. ^ a b Mindat.org
  3. ^ Webmineral data

This article about a specific oxide mineral is a stub. You can help Wikipedia by expanding it.

Retrieved from "https://en.wikipedia.org/enwiki/w/index.php?title=Janggunite&oldid=571024886"