(noun.) a white mineral consisting of fluorides of aluminum and sodium; a source of fluorine.
整理:露丝
双语例句
It has, however, for the most parts been superseded by the process patented by Hall, April 2, 1889, No. 400,766, in which alumina dissolved in fused cryolite is electrically decomposed. Edward W. Byrn.十九世纪发明进展.