Leucophane

Leu″co‐phane (lū″kō̍‐fān), n. [Gr. λευκοφανήσ appearing bright or white; λευκόσ white + φαίνειν 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.