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Sturmanite & Manganite

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JYJ841236

Sturmanite & Manganite

SEM-EDS no 938
Analysed

Description Tabs

Description
Locality: 
Hotazel, Kalahari, Northern Cape Province, South Africa
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.74 × 3.4 × 1.6 cm
Description

Yellow sturmanite associated with manganite from the Hotazel mine, South Africa, Africa. 

Very rich and good specimen no 938. Analysis attached.

 

Mineral Data
What's on the rock

Sturmanite

Formula: 
Ca6(Fe3+,Al,Mn3+)2(SO4)2[B(OH)4](OH)12·25H2O
Strunz: 
7.DG.15
Crystal System: 
Trigonal
Hardness: 
2.5
Type Locality: 
Black Rock Mine, Black Rock, Kalahari manganese field, Northern Cape Province, South Africa

Manganite

Formula: 
Mn3+O(OH)
Strunz: 
4.FD.15
Hardness: 
4.0
Type Locality: 
Manganese deposit, Ilfeld, Nordhausen, Harz, Thuringia, Germany
Analysis
Analysis Report - only: Sturmanite & Manganite
Analysis Report - only: Sturmanite & Manganite
Analysis Report - only: Sturmanite & Manganite
Analysis Report - only: Sturmanite & Manganite