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Holtedahlite

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ESM219018

Holtedahlite

Description Tabs

Description
Locality: 
Tingelstadtjern Quarry, Modum, Viken, Norway
Size Range: 
Small miniature (3-4.5 cm)
Size: 
2.7 × 3.1 × 1.7 cm
Description

Colorless-grey glassy crystalline holtedahlite
type locality

Mineral Data
What's on the rock

Holtedahlite

Formula: 
Mg2(PO4)(OH)
Strunz: 
8.BB.20
Crystal System: 
Trigonal
Hardness: 
4.5 - 5.0
Colour: 
Colourless
Type Locality: 
Tingelstadtjern Quarry, Modum, Buskerud, Norway
Dimorph Of: 

Althausite

Formula: 
Mg4(PO4)2(OH,O)(F,☐)
Strunz: 
8.BB.25
Hardness: 
3.5 - 4.0