kutnahorite

kutnahorite

[‚kət·nə′hȯr‚īt]
(mineralogy)
Ca(Mn,Mg,Fe)(CO3)2 A rare carbonate of calcium and manganese, found with some magnesium and iron substituting for manganese; forms rhombohedral crystals and is isomorphous with dolomite.
References in periodicals archive ?
The braunite ore is relatively rich in veins and vugs containing good specimens of rhodonite, rhodochrosite, tephroite, kutnahorite, pyroxmangite and barite.
Some attractive specimens from the Molinello mine show crystals up to 2 cm, associated with quartz, ganophyllite, kutnahorite and, in places, hematite or sulfides.
Kutnahorite is a Mn-rich carbonate belonging to the dolomite group.