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Althausite

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MCH125970

Althausite

Type Locality

Description Tabs

Description
Locality: 
Tingelstadtjern Quarry, Modum, Viken, Norway
Size Range: 
Small cabinet (7-10 cm)
Size: 
8.5 × 7 × 2 cm
Description

A large grey coloured cleavage of althausite from the Tingelstadtjern magnesite/serpentine deposit - the type-locality of this mineral with some green fluorapatite and yellow serpentine.

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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