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Dara-i-Pech pegmatite field (Darra-i-Pech; Darra-e-Pech; Pech; Peech; Page), Chapa Dara District, Konar Province (Kunar Province; Konarh Province; Konarha Province; Nuristan), Afghanistan
© 2002, Jesse Fisher
Formerly known as manganocolumbite.
Classification of Columbite-(Mn)
|IMA status:||Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"|
|Strunz 8th edition ID:||4/D.18-20|
|Nickel-Strunz 10th (pending) edition ID:||4.DB.35|
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
B : With medium-sized cations; chains of edge-sharing octahedra
|Dana 8th edition ID:||188.8.131.52|
8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
3 : AB2O6
|Hey's CIM Ref.:||18.1.39|
18 : Niobates and Tantalates
1 : Niobates and tantalates containing neither rare earths nor U
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Physical Properties of Columbite-(Mn)
Crystallography of Columbite-(Mn)
|Cell Parameters:||a = 5.76Å, b = 14.43Å, c = 5.08Å|
|Ratio:||a:b:c = 0.399 : 1 : 0.352|
|Unit Cell Volume:||V 422.23 Å³ (Calculated from Unit Cell)|
|Comment:||Strong subcell has b/3.|
|X-Ray Powder Diffraction:|
Radiation - Copper Kα
Data courtesy of RRUFF project at University of Arizona, used with permission.
Optical Data of Columbite-(Mn)
|Dispersion:||r > v strong|
Chemical Properties of Columbite-(Mn)
|Simplified for copy/paste:||(Mn,Fe)(Nb,Ta)2O6|
|Essential elements:||Mn, Nb, O|
|All elements listed in formula:||Fe, Mn, Nb, O, Ta|
Relationship of Columbite-(Mn) to other Species
|Series:||Forms a series with Columbite-(Fe) (see here)|
|Member of:||Columbite Group|
|Other Members of Group:|
|Related Minerals - Nickel-Strunz Grouping):|
|Related Minerals - Hey's Index Grouping:|
Other Names for Columbite-(Mn)
|Health Warning:||No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.|
References for Columbite-(Mn)
American Mineralogist (1995): 80: 613-619.
E. J. Kinast, O. Isnard, J. B. M. da Cunha, M. A. Z. de Vasconcellos and C. A. dos Santos (2011): A new approach for the determination of multiple cation locations and ordering, using the example of natural and heat-treated columbites. J. Appl. Crystallogr. 44, 738-746.
Internet Links for Columbite-(Mn)
|Specimens:||The following Columbite-(Mn) specimens are currently listed for sale on minfind.com.|
Localities for Columbite-(Mn)
The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.