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Jahnsite-(NaMnMg) Strengite & Rockbridgeite

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PAV1037309

Jahnsite-(NaMnMg) Strengite & Rockbridgeite

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Description Tabs

Description
Locality: 
Eduardo Claim, Conselheiro Pena, Minas Gerais, Brazil
Class: 
Crystal Group/Cluster
Size Range: 
Small miniature (3-4.5 cm)
Size: 
2 × 4.4 × 2.7 cm
Description

Very rich and spectacular sample from Eduardo Claim!

Jahnsite-(NaMnMg) crystals. The crystals are zoned, the deeper ends are jahnsite-(CaMnMg). They are associated to strengite and deep green rockbridgeite. Laueite is also present as orange crystals.

An absolute beauty under the scope!!!

Acquired: 
Pasted Label Detached
Mineral Data
What's on the rock

Jahnsite-(NaMnMg)

Formula: 
{(Na,Ca)}{(Mn2+,Fe3+)}{(Mg,Fe3+)2}{Fe3+2}(PO4)4(OH)2 · 8H2O
Strunz: 
8.DH.15
Crystal System: 
Monoclinic
Type Locality: 
Sapucaia Mine, Sapucaia do Norte, Galiléia, Minas Gerais, Brazil

Strengite

Formula: 
FePO4·2H2O
Strunz: 
8.CD.10
Hardness: 
3.5 - 4.0
Streak: 
white
Type Locality: 
Eleonore Mine, Rodheim-Bieber, Wetzlar, Hesse, Germany

Rockbridgeite

Formula: 
Fe2+Fe3+4(PO4)3(OH)5
Strunz: 
8.BC.10
Crystal System: 
Orthorhombic
Hardness: 
3.5 - 4.5
Type Locality: 
Midvale Mine, South Mountain, Midvale, Rockbridge Co., Virginia, USA