keffekilite

[Named by Fischer, in 1811, from keffekil, probably an Asiatic word; suff. -ite ( Min. ).] Min.: A pearl-gray mineral, with a greasy feel, from the Crimea; contains silica, alumina, sesquioxide of iron, ., and is clearly only a clay. ( Dana .) Cronstedt states, in 1758, that the Keffekil tartarorum was used by the Tartars as soap. *kef-fel, s. [Gr. kephalē .] The head. kěg, *cag, s. [Icel, kaggi; Sw. & Norw. kagge.] A small cask or barrel.