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Shimenite & Christite

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SKY908724

Shimenite & Christite

Type Locality

Description Tabs

Description
Locality: 
Shimen County, Changde, Hunan Province, China (Peoples Republic)
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.3 × 1 × 0.7 cm
Description

Black crystals of the new and extremely rare thallium mineral shimenite (IMA 2021-069)  from the type locality in Shimen associated to dark red crystals of the very rare thallium sulphosalt mineral christite. Matrix is orpiment and minoritary realgar

Both species can be differentiated by the color, see for example photo 1: dark red christite microcrystals (left) and almost black shimenite (right).

Two very rare thallium species in a single specimen !

Shimenite was previously known as Pb-free dalnegroite before it was approved as a new mineral, and Shimen is the only locality worldwide

Mineral Data
What's on the rock

Shimenite

Formula: 
Tl5Sb21-yAsyS34
Crystal System: 
Triclinic
Type Locality: 
Jiepaiyu Mine, Shimen, Shimen County, Changde, Hunan Province, China (Peoples Republic)

Christite

Formula: 
TlHgAsS3
Strunz: 
2.HD.15
Hardness: 
1.0 - 2.0
Type Locality: 
Carlin Gold mine, Elko, Lynn District, Eureka Co., Nevada, USA

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