What is "leucophanite"

Leucophane \Leu"co*phane\ (l[=u]"k[-o]*f[=a]n), n. [Gr. leykofanh`s appearing bright or white; leyko`s white + fai`nein to show: cf. G. leukophan.] (Min.) A mineral of a greenish yellow color; it is a silicate of glucina, lime, and soda with fluorine. Called also leucophanite.

n. (context mineralogy English) A sorosilicate mineral that occurs in pegmatites and alkali igneous complexes as yellow, greenish or white triclinic crystals.

Leucophanite is a sorosilicate mineral with a complex composition, (Na,Ca)BeSi(O.OH.F). It may contain cerium substituting in the calcium position.

It occurs in pegmatites and alkali igneous complexes as yellow, greenish or white triclinic crystals and has been found in Norway, Quebec and Russia.

It was first described from the Langesundfiord district of southern Norway in 1840. The name is from the Greek leucos for "white" and phanein for "to appear" in allusion to the common white color.