• (n.) A fluoride of alumina and soda occurring with the Greenland cryolite in octahedral crystals.
Ral'ston·ite (ral'stŭn*īt) noun [ So named after J. German Ralston of Norristown, Penn.] (Min.) A fluoride of alumina and soda occurring with the Greenland cryolite in octahedral crystals.