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Roscherite Fluor-elbaite & Autunite

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SER1030049

Roscherite Fluor-elbaite & Autunite

Description Tabs

Description
Locality: 
Ponte do Piauí Claim, Piauí Valley, Taquaral, Minas Gerais, Brazil
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.1 × 3.5 × 2.5 cm
Description

hundreds of brown balls of roscherite crystals on and with green fluorelbite crystals and some tiny platy yellow autunite crystals too

Mineral Data
What's on the rock

Roscherite

Formula: 
Ca2Mn2+5Be4(PO4)6(OH)4·6H2O
Strunz: 
8.DA.10
Crystal System: 
Monoclinic Tabular crystals or platy aggregates
Hardness: 
4.5 - 0.0
Streak: 
White
Type Locality: 
Greifenstein Rocks, Ehrenfriedersdorf, Erzgebirge, Saxony, Germany

Fluor-elbaite

Formula: 
Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3F
Hardness: 
0.0
Streak: 
White
Type Locality: 
Cruzeiro mine, São José da Safira, Doce valley, Minas Gerais, Brazil

Autunite

Formula: 
Ca(UO2)2(PO4)2·11H2O
Strunz: 
8.EB.05
Crystal System: 
Tetragonal
Hardness: 
2.0 - 2.5
Type Locality: 
Saint-Symphorien-de-Marmagne, Montcenis, Saône-et-Loire, Burgundy, France

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Start 20 May 18:00
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