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Jahnsite-(CaMnMn) & Frondelite

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CSL217951

Jahnsite-(CaMnMn) & Frondelite

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Description Tabs

Description
Locality: 
Silbergrube, Waidhaus, Upper Palatinate, Bavaria, Germany
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.7 × 2.9 × 1.9 cm
Description

Very nice yellow microcrystals of rare jahnsite-(CaMnMn) in association with brown tiny balls and needles of frondelite, on typical pegmatite matrix. Good coverage of both minerals. Recently analyzed old material from the early nineties.

Mineral Data
What's on the rock

Jahnsite-(CaMnMn)

Formula: 
{Ca}{Mn2+}{Mn2+2}{Fe3+2}(PO4)4(OH)2·8H2O
Strunz: 
8.DH.15
Hardness: 
4.0
Streak: 
White
Type Locality: 
Cubos-Mesquitela-Mangualde area, Mangualde, Viseu District, Portugal

Frondelite

Formula: 
Mn2+Fe3+4(PO4)3(OH)5
Strunz: 
8.BC.10
Hardness: 
4.5
Type Locality: 
Sapucaia Mine (Proberil mine), Sapucaia do Norte, Galiléia, Doce valley, Minas Gerais, Brazil
Loranth Minerals

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