The silver antimonide mineral dyscrasite has the chemical formula Ag3Sb. It is an opaque, silver white, metallic mineral which crystallizes in the orthorhombic crystal system. It forms pyramidal crystals up to 5 cm and can also form cylindrical and prismatic crystals. ==Crystallography and properties== Dyscrasite is a metal ore and is opaque. In r... Found on http://en.wikipedia.org/wiki/Dyscrasite
(from the article `antimonide`) Two common antimonides are dyscrasite (Ag3Sb) and stibiopalladinite (Pd5Sb2). Dyscrasite exhibits a distinct orthorhombic symmetry. It is an ... Found on http://www.britannica.com/eb/a-z/d/88