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Holtedahlite

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JYJ645779

Holtedahlite

Description Tabs

Description
Locality: 
Snarum, Modum, Viken, Norway
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.5 × 1.5 × 1 cm
Description

Grey masses of holtedahlite with apatite. 

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
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