Spaltiite from the Lengenbach quarry. The crystal has dimensions of mm3, elongated along [001] and flattened parallel to {100}. — Photo: Stefan Graeser, Dan Topa, Herta Silvia Effenberger, Emil Makovicky, Werner Hermann Paar, and George Dincă · CC BY 4.0
Spaltiite
A rare thallium-copper-arsenic sulfosalt from a waste dump at the legendary Lengenbach quarry.
Intro adapted from Wikipedia (CC BY-SA).
Spaltiite is an IMA-recognized mineral species in the sulfosalt class, with the chemical formula Tl₂Cu₂As₂S₅.
It crystallizes in the monoclinic crystal system (space group P2_1/c).
IMA symbol Spti, IMA status: approved, named in 2014.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data and a Wikipedia introduction — a full written entry hasn’t been published yet.
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