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Pharmacosiderite Jarosite & Arseniosiderite

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PAV1056244

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Description
Locality: 
Kamariza Mines, Agios Konstantinos, Lavrion District, Attiki Prefecture, Greece
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
1.9 × 2.3 × 2.3 cm
Description

Interesting sample! Several golden orange pharmacosiderite crystals associated to jarosite/natrojarosite. Both are partially coated by arseniosiderite.

Acquired: 
Boxed with Label
Mineral Data
What's on the rock

Pharmacosiderite

Formula: 
KFe3+4(AsO4)3(OH)4·6-7H2O
Strunz: 
8.DK.10
Hardness: 
2.5
Streak: 
white
Type Locality: 
Carharrack Mine, St Day United Mines (Poldice Mines), Gwennap, Camborne - Redruth - St Day District, Cornwall, England, UK

Jarosite

Formula: 
KFe3+ 3(SO4)2(OH)6
Strunz: 
7.BC.10
Crystal System: 
Trigonal - Pyramidal Class
Hardness: 
2.5 - 3.5
Type Locality: 
Jaroso Ravine, Sierra Almagrera, Cuevas del Almanzora (Cuevas de Vera), Almería, Andalusia, Spain

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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Start 28 Sep 18:00
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