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Cuatrocapaite-(NH4) Lucabindiite & Lavendulan

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ASC693016

Cuatrocapaite-(NH4) Lucabindiite & Lavendulan

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Description Tabs

Description
Locality: 
Torrecillas Mine, Salar Grande, Iquique, Tarapacá Region, Chile
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.5 × 4.5 × 3.5 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. This is one of the best specimens I have to offer. Multiple spots with withish to waterclear hexagonal patelets, often in vermiform aggregates and stacks, associated with waterclear hexagonal crystals of Lucabindiite (extremely well developed for this species too!, but difficult to divide from Cuatrocapaite - usually the crystals are are a little thicker with sharp edges sometimes tapered). Very estethic 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
Not Sold

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