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Jahnsite-(CaMnMg)

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SER1039039

Jahnsite-(CaMnMg)

Type Locality

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Description
Locality: 
Tip Top Mine, Fourmile, Custer County, South Dakota, United States of America
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
2.4 × 2.1 × 0.8 cm
Description

yellow green crystals of jahnsite-(CaMnMg) from its type locality

Mineral Data
What's on the rock

Jahnsite-(CaMnMg)

Formula: 
{Ca}{Mn2+}{(Mg,Fe2+)2}{Fe3+2}(PO4)4(OH)2·8H2O
Strunz: 
8.DH.15
Hardness: 
4.0
Streak: 
White
Type Locality: 
Tip Top Mine (Tip Top pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USA

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20
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Start 09 Apr 18:00
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