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Shigaite & Alleghanyite

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JYJ849006

Shigaite & Alleghanyite

Description Tabs

Description
Locality: 
NChwaning Mines, Kuruman, Northern Cape Province, South Africa
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.6 × 3 × 2.3 cm
Description

Platy tabular shigaite associated with SEM-EDS & SCXRD confirmed alleghanyite from the NChwaning Mines, Kuruman, South Africa. 

Analysis no 947. Analysis in the analytical section. 

 

Mineral Data
What's on the rock

Shigaite

Formula: 
Mn6Al3(OH)18[Na(H2O)6][SO4]2·6H2O
Strunz: 
7.DD.35
Hardness: 
0.0
Type Locality: 
Ioi mine, Ritto City, Shiga Prefecture, Kinki Region, Honshu Island, Japan

Alleghanyite

Formula: 
Mn2+5(SiO4)2(OH)2
Strunz: 
9.AF.45
Crystal System: 
Monoclinic
Hardness: 
5.5
Type Locality: 
Bald Knob, Sparta, Alleghany County, North Carolina, United States of America
Analysis
Analysis Report - only: Shigaite & Alleghanyite
Analysis Report - only: Shigaite & Alleghanyite
Analysis Report - only: Shigaite & Alleghanyite