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Nafeasite & Juansilvaite

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HEF1038675

Nafeasite & Juansilvaite

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Description
Locality: 
Torrecillas Mine, Salar Grande, Iquique Province, Tarapacá Region, Chile
Class: 
Massive/Crystalline
Size Range: 
Thumbnail (1-3cm)
Size: 
1.6 × 1.1 × 0.7 cm
Description

Light pink nafeasite with deep-pink juansilvaite on matrix. Both minerals are only known from this location.

Mineral Data
What's on the rock

Nafeasite

Formula: 
Na3Fe3+3(AsO3OH)6 · 3H2O
Strunz: 
8.CF.
Crystal System: 
Monoclinic
Hardness: 
2 - 3
Type Locality: 
Torrecillas mine, Salar Grande, Iquique Province, Tarapacá, Chile

Juansilvaite

Formula: 
Na5Al3[AsO3(OH)]4[AsO2(OH)2]2(SO4)2·4H2
Crystal System: 
Monoclinic
Type Locality: 
Torrecillas Mine, El Tamarugal Province, Tarapacá Region, Chile

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