Simonite
Simonite is an IMA-recognized mineral species in the sulfosalt class, with the chemical formula TlHgAs₃S₆.
It crystallizes in the monoclinic crystal system (space group P2_1/n).
Key properties: specific gravity 5.036.
IMA symbol Smo, IMA status: approved, named in 1982.
Occurs as inclusions in rebulite.
It is found associated with Rebulite, christite or routhierite, parapierrotite.
Apparently to honor Simon Engel, son of Peter Engel, Swiss crystallographer, the principal describer.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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