Routhierite

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Routhierite
General
Category Sulfosalt mineral
Formula
(repeating unit)
Tl(Cu,Ag)(Hg,Zn)2(As,Sb)2S6
Strunz classification 2.GA.40
Crystal system Tetragonal
Ditetragonal pyramidal class
Unit cell a = 9.9821(11), c = 11.3122(12) [Å]; Z = 4
Identification
Color Violet-red
Crystal habit Anhedral grains, xenomorphic grains and veinlets
Crystal symmetry Tetragonal
H-M symbol: (4mm)
Space group: I 4mm
Twinning Microscopic polysynthetic twin lamellae
Cleavage 2; two perpendicular
Mohs scale hardness 3.5
Luster Metallic
Diaphaneity Opaque
Density 5.83
Pleochroism Weak
References [1][2][3]

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

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.[1]

References[edit]