simonite

A monoclinic-prismatic red mineral containing arsenic, mercury, sulphur, and thallium.

Noun

  1. A monoclinic-prismatic red mineral containing arsenic, mercury, sulphur, and thallium.

Origin

Simonite (TlHgAs₃S₆), found in Allchar, Macedonia, Yugoslavia, named in 1982 for Simon Engel, son of Peter Engel (b. 1942), a Swiss crystallographer, + -ite