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www.mineralgallery.co.za Minerals K-O |
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Nigerite (Ferronigerite-2N1S) |
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Name
Nigerite
Chemistry
Sn(Fe,Mg)Al 6 O 11 (OH)
Uses
As a mineral specimen
Color
Brown to red
Hardness
8.5 like chrysoberryl
Specific gravity
4.51
Crystals
Hexagonal, Trigonal system
Fracture
Hackly - Jagged, torn surfaces, (e.g. fractured metals).
Luster
Vitreous - Greasy
Cleavage
None
Streak
grayish white
Similar to:
Mica
It is also known as Ferronigerite -2N1S with a complex chemistry of (FeMg) 4(AL10Sn2)12O22(OH)2. The type locality is Egbe district, Kabba Province, Nigeria. Originally named Nigerite, for the type locality in Nigeria. Renamed according to the new Nigerite group nomenclature as Fe dominant mineral and the 2N1S polysome
Localities where found. Canada
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Ontario,Thunder Bay District, Manitouwadge, Geco Mine
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Czech Republic, Moravia (Maehren; Mähren), Pribyslavice
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Nigeria, Kabba province, Egbe district (TL)
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Sweden, Dalarna, Falun, Falu mine
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Uis, Three aloes tantalite mine, Namibia
Nigerite contains the following elements. Al, Fe, H, Mg, O, Sn
Nigerite is a rare mineral which every systematic collector should have in his collection.
