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Parapierrotite

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SKY660086

Parapierrotite

Classic Locality

Description Tabs

Description
Locality: 
Lengenbach Quarry, Binntal, Wallis, Switzerland
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.5 × 1.5 × 1.5 cm
Description

Very small black crystal aggregates of parapierrotite, a thallium mineral that is extremely are at Lengenbach since only a very few specimens have been found in the quarry , all of them in 1976 and 1979.

Analyzed specimen by EDX. Analysis will be sent to the buyer.

Find of 1979, but only identified in 2014 !. The original text of the discovery is:

April 3, 2014. FGL member Luca De Battisti and PAS Prof. Fabrizio Nestola announce the identification of parapierrotite at Lengenbach (coll. LDB). First EDS analyses (LDB) had shown the mineral to be something like an Sb-rich imhofite. However, single crystal XRD investigations in Padua (FN) now clearly show the spherical aggregates of tiny platy crystals found in 1976 and 1979 to be parapierrotite. In the past such dark brown aggregates of parapierrotite may well have been mis-identified as imhofite or lengenbachite.

Ex-T.Raber specimen with label included.

 

Mineral Data
What's on the rock

Parapierrotite

Formula: 
Tl(Sb,As)5S8
Strunz: 
2.HC.05f
Hardness: 
2.5 - 3.0
Colour: 
Black
Type Locality: 
Allchar (Alsar; Alshar), Roszdan, Republic of Macedonia

Seller Information

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