Routhierite

Routhierite is a rare thallium sulfosalt mineral with formula Tl(Cu,Ag)(Hg,Zn)2(As,Sb)2S6.

Routhierite
Routhierite.jpg
Routhierite cristals (red).
General
CategorySulfosalt mineral
Formula
(repeating unit)		Tl(Cu,Ag)(Hg,Zn)2(As,Sb)2S6
Strunz classification2.GA.40
Crystal systemTetragonal
Crystal classDitetragonal pyramidal (4mm)
H-M symbol: (4mm)
Space groupI4mm
Unit cella = 9.9821(11),
c = 11.3122(12) [Å]; Z = 4
Identification
ColorViolet-red
Crystal habitAnhedral grains, xenomorphic grains and veinlets
TwinningMicroscopic polysynthetic twin lamellae
Cleavage2; two perpendicular
Mohs scale hardness3.5
LusterMetallic
DiaphaneityOpaque
Density5.83
PleochroismWeak
References[1][2][3]


It was first described in 1974 for an occurrence in the Jas Roux deposit in the French Alps.[2] It was named after French geologist Pierre Routhier (1916–2008).[4] It is also reported from the Northern Ural Mountains, Russia and the Thunder Bay district of Ontario, Canada. 


This article uses material from the Wikipedia article
 Metasyntactic variable, which is released under the 
Creative Commons
Attribution-ShareAlike 3.0 Unported License.