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Althausite

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SYA758922

Althausite

Type Locality

Description Tabs

Description
Locality: 
Vikersund, Modum, Viken, Norway
Class: 
Combination
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.5 × 4.2 × 3.5 cm
Largest Crystal: 
3.00cm
Description

Rough dark brown-maroon althausite crystals in chlinochlore rich matrix.

Good sample from the Type locality.

Mineral Data
What's on the rock

Althausite

Formula: 
Mg4(PO4)2(OH,O)(F,☐)
Strunz: 
8.BB.25
Crystal System: 
Orthorhombic
Hardness: 
3.5 - 4.0
Colour: 
Pale gray, reddish brown
Type Locality: 
Tingelstadtjern Quarry, Modum, Buskerud, Norway
Dimorph Of: 

Holtedahlite

Formula: 
Mg2(PO4)(OH)
Strunz: 
8.BB.20
Hardness: 
4.5 - 5.0

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