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Brandtite & Arseniosiderite

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RHT681126

Brandtite & Arseniosiderite

Classic Locality

Description Tabs

Description
Locality: 
Hartkoppe, Sailauf, Hösbach, Spessart, Franconia, Bavaria, Germany
Class: 
Combination
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.4 × 4.7 × 3.1 cm
Description

Bundles of white to pale brownish beige platy-acicular brandtite crystals on matrix. The tiny black/brown spots on some crystals are probably arseniosiderite (visual ID).

Mineral Data
What's on the rock

Brandtite

Formula: 
Ca2(Mn2+,Mg)(AsO4)2·2H2O
Strunz: 
8.CG.10
Crystal System: 
Monoclinic
Hardness: 
3.5
Type Locality: 
Harstigen Mine, Pajsberg, Persberg district, Filipstad, Värmland, Sweden

Arseniosiderite

Formula: 
Ca2Fe3+3(AsO4)3O2·3H2O
Strunz: 
8.DH.30
Crystal System: 
Monoclinic
Hardness: 
4.5
Type Locality: 
Manganese deposit, Romanèche-Thorens, La Chapelle-de-Guinchay, Saône-et-Loire, Burgundy, France

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