coffinite

== English == === Etymology === From Coffin +‎ -ite, after Reuben Clare Coffin, American geologist. === Noun === coffinite (plural coffinites) (mineralogy) A brown or black uranium-bearing silicate mineral. === Further reading === David Barthelmy (1997–2026), “Coffinite”, in Webmineral Mineralogy Database. “coffinite”, in Mindat.org, Keswick, Va.: Hudson Institute of Mineralogy, 2000–2026.