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Heptasartorite & Enneasartorite

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SKY612102

Heptasartorite & Enneasartorite

Type Locality

Description Tabs

Description
Locality: 
Lengenbach Quarry, Binntal, Valais, Switzerland
Class: 
Crystals on Matrix
Size Range: 
Micromount (under 1cm)
Size: 
0.5 × 0.5 × 0.5 cm
Description

Outstanding black metallic crystals of the new and extremely rare new thallium minerals heptasartorite (IMA 2015-073) and  enneasartorite (IMA 2015-074) associated to intergrown rathite. Analyzed specimen by WDS-DT (ref.HG-304-1) by Dan Topa of NHM Wien,  see copy enclosed, that will be sent to the buyer. Find of circa 1990. Heptasartorite and enneasartorite are visually indistinguishable. Of course, type locality and only locality known for both species.

Two extreme rarities in a single specimen!

For more info about the discovery of these new minerals see: 

Topa, D., Stroeger, B., Makovicky, E., Berlepsch, P.and Stanley, C. (2015) Heptasartorite, IMA 2015-073. CNMNC Newsletter No. 28, December 2015, page 1861; Mineralogical Magazine, 79, 1859–1864.

Topa,D.,Berlepsch,P.,Makovicky,E., Stroeger, B. and Stanley, C. (2015) Enneasartorite, IMA 2015-074. CNMNC Newsletter No. 28, December 2015, page 1861; Mineralogical Magazine, 79, 1859–1864.

Mineral Data
What's on the rock

Heptasartorite

Formula: 
Tl7Pb22As55S108
Group Parent: 
Sartorite
Crystal System: 
Monoclinic
Type Locality: 
Lengenbach Quarry, Binn Valley, Wallis, Switzerland

Enneasartorite

Formula: 
Tl6Pb32As70S140
Group Parent: 
Sartorite
Crystal System: 
Monoclinic
Type Locality: 
Lengenbach Quarry, Binn Valley, Wallis, Switzerland

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