ullmannite

== English == === Etymology === Johann Christoph Ullmann (1771-1821), German mineralogist, +‎ -ite === Noun === ullmannite (countable and uncountable, plural ullmannites) (mineralogy) A nickel antimony sulphide mineral. === Further reading === David Barthelmy (1997–2026), “Ullmannite”, in Webmineral Mineralogy Database. “ullmannite”, in Mindat.org‎[1], Hudson Institute of Mineralogy, 2000–2026.