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Gjerdingenite-Mn & Janhaugite

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HEF1024666

Gjerdingenite-Mn & Janhaugite

Description Tabs

Description
Locality: 
Gjerdingselva, Nordmarka, Lunner, Viken, Norway
Class: 
Massive/Crystalline
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.9 × 2.6 × 1.4 cm
Description

Pale yellow crystals of gjerdingenite-Mn with janhaugite (yellow arrows) on matrix

Mineral Data
What's on the rock

Gjerdingenite-Mn

Formula: 
K2Mn2+(Nb,Ti)4(Si4O12)2(O,OH)4·6H2O
Strunz: 
9.CE.30c
Hardness: 
5.0 - 0.0
Type Locality: 
Gjerdingselva (Gjerdingen), Nordmarka, Lunner, Oppland, Norway

Janhaugite

Formula: 
(Na,Ca)3(Mn2+,Fe2+)3(Ti,Zr,Nb)2(Si2O7)2O2(OH,F)2
Strunz: 
9.BE.17
Hardness: 
5.0
Type Locality: 
Gjerdingselva (Gjerdingen), Nordmarka, Lunner, Oppland, Norway

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