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Natropharmacosiderite & Arseniosiderite

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PFK659259

Natropharmacosiderite & Arseniosiderite

Classic Locality

Description Tabs

Description
Locality: 
Christiana Mine, Kamariza, Agios Konstantinos, Lavrion District, Attiki Prefecture, Greece
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.7 × 4.5 × 5.1 cm
Description

Excellent rarity combo example of olive greenish brown crystals of natropharmacosiderite, associated with spherical, brownish arseniosiderite.

Mineral Data
What's on the rock

Natropharmacosiderite

Formula: 
(Na,K)Fe3+4(AsO4)3(OH)4·6-7H2O
Strunz: 
8.DK.10
Hardness: 
3.0
Type Locality: 
Marda oxidized zone, Koolyanobbing, Yilgarn Shire, Western Australia, Australia

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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