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Okruschite

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JYJ541969

Okruschite

Description Tabs

Description
Locality: 
Sailauf, Lower Franconia, Bavaria, Germany
Class: 
Crystals on Matrix
Size Range: 
Micromount (under 1cm)
Size: 
0.7 × 0.5 × 0.4 cm
Description

 

Pale yellow to colourless okruschite on arseniosiderite matrix. Specimen has been EDS analysed (qualitative, uncoated). Apfu measured: Ca 3 Mn/Fe 5.5 As 5 - apfu calculated: Ca 2 Mn,Fe 5 As 6

Has been EDS - Raman compared with brandtite. Brandtite has less Mn and a different Ca/Mn ratio. Raman spectra were collected. Brandtite matches rruff database. Okruschite spectrum is different, but no references are available. 

Rare and studied material.

Mineral Data
What's on the rock

Okruschite

Formula: 
Ca2Mn2+5Be4(AsO4)6(OH)4·6H2O
Hardness: 
0.0
Colour: 
White
Type Locality: 
Fuchs Quarry, Hartkoppe, Sailauf, Hösbach, Spessart, Franconia, Bavaria, Germany
Analysis
Analysis Report - only: Okruschite