Late 19th century; earliest use found in Journal of the Chemical Society. From Italian facellite from ancient Greek ϕάκελος (also ϕάκελλος) bundle + Italian -ite-ite.
Definition of facellite in US English:
facellite
(also phacellite, phacelite)
noun
Mineralogy
Kaliophilite.
Origin
Late 19th century; earliest use found in Journal of the Chemical Society. From Italian facellite from ancient Greek ϕάκελος (also ϕάκελλος) bundle + Italian -ite -ite.