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Cuatrocapaite-(NH4) Lucabindiite & Lavendulan

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ASC693019

Cuatrocapaite-(NH4) Lucabindiite & Lavendulan

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Description Tabs

Description
Locality: 
Torrecillas Mine, Salar Grande, Iquique Province, Tarapacá Region, Chile
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.5 × 1.8 × 2 cm
Description

This is part of a very limited lot directly from one of the authors involved the description of this new mineral - IMA2018-083. Several spots of withish to waterclear hexagonal patelets in vermiform aggregates and stacks associated with possible waterclear hexagonal crystals of Lucabindiite difficult to divide from Cuatrocapaite - usually the crystals are are a little thicker with sharp edges sometimes tapered). nice combination with azure-blue Lavendulan

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

Lucabindiite

Formula: 
(K,NH4)As4O6(Cl,Br)
Hardness: 
0.0
Streak: 
white
Type Locality: 
La Fossa crater, Vulcano Island, Lipari, Eolie Islands (Aeolian Islands), Messina Province, Sicily, Italy

Lavendulan

Formula: 
NaCaCu5(AsO4)4Cl·5H2O
Strunz: 
8.DG.05
Hardness: 
2.5
Type Locality: 
Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic

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