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Cuatrocapaite-(NH4)

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JYJ688373

Cuatrocapaite-(NH4)

Description Tabs

Description
Locality: 
Torrecillas Mine, Salar Grande, Iquique Province, Tarapacá Region, Chile
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.5 × 1.3 × 0.8 cm
Description

Colourless cuatrocapaite-NH4 crystals on matrix. Previously V. Bourgoin collection. The mineral was previously found in my lab together with G. Möhn. Identification of these minerals can be problematic by means of SEM-EDS, because of the Mg/As overlapping. 

Very rare!

 

Mineral Data
What's on the rock

Cuatrocapaite-(NH4)

Formula: 
(NH4)3(NaMg☐)(As2O3)6Cl6·16H2O
Crystal System: 
Trigonal
Colour: 
White
Type Locality: 
Torrecillas mine, Salar Grande, Iquique Province, Tarapacá Region, Chile