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Jahnsite-(NaMnMg) & Ushkovite

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JYJ835798

Jahnsite-(NaMnMg) & Ushkovite

SEM-EDS confirmed no 2481

Description Tabs

Description
Locality: 
Sapucaia Mine, Sapucaia do Norte, Galiléia, Minas Gerais, Brazil
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.4 × 1.6 × 1.4 cm
Description

Yellow jahnsite-(NaMnMg) associated with orange ushkovite in cavities. Ushkovite is new for the locality. Both phases have been SEM-EDS confirmed. SEM-EDS analysis no 2481. 

Analysis in the analytical section. 

 

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

Ushkovite

Formula: 
MgFe3+2(PO4)2(OH)2·8H2O
Strunz: 
8.DC.30
Crystal System: 
Triclinic
Hardness: 
3.5
Type Locality: 
Pit No. 232, Bol'shoi Tatkul' Lake, Ilmen Natural Reserve, Ilmen Mts, Chelyabinsk Oblast', Southern Urals, Urals Region, Russia...
Analysis
Analysis Report - only: Jahnsite-(NaMnMg) & Ushkovite
Analysis Report - only: Jahnsite-(NaMnMg) & Ushkovite