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Alleghanyite & Allactite

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JYJ916810

Alleghanyite & Allactite

Description Tabs

Description
Locality: 
Kombat Mine, Grootfontein, Otjozondjupa Region, Namibia
Class: 
Crystals on Matrix
Size Range: 
Micromount (under 1cm)
Size: 
0.7 × 0.4 × 0.3 cm
Description

SEM-EDS & SXRD confirmed alleghanyite with yellow SEM-EDS & SXRD confirmed allactite. 

Mineral Data
What's on the rock

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

Allactite

Formula: 
Mn2+7(AsO4)2(OH)8
Strunz: 
8.BE.30
Crystal System: 
Monoclinic
Hardness: 
4.5
Type Locality: 
Moss mine, Nordmark (Nordmarksberg), Filipstad, Värmland, Sweden