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Hidalgoite

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SKY672837

Hidalgoite

Rare Mineral

Description Tabs

Description
Locality: 
Tsumeb Mine, Otavi Highlands, Namibia
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2 × 1.2 × 0.7 cm
Description

Hidalgoite is a rare Pb-Al arsenate-sulphate worldwide, but in Tsumeb it is extremely rare (labeled as RRR in Gebhard Tsumeb II book, that is. single occurrence with less than 10 specimens known).

It occurs in this specimen as yellow crystal aggregates (!) on matrix . Following Gebhard Tsumeb II book (p.287) referring to hidalgoite crystals: "Although small, they represent the best of the species, since hidalgoite crystals are virtually unknown". 

Analyzed specimen (see copy). 

Mineral Data
What's on the rock

Hidalgoite

Formula: 
PbAl3(AsO4)(SO4)(OH)6
Strunz: 
8.BL.05
Hardness: 
4.5
Type Locality: 
San Pascual Mine (San Pasquale Mine), Zimapán, Mun. de Zimapán, Hidalgo, Mexico

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