'Ralstonite' definitions:

Definition of 'Ralstonite'

From: GCIDE

Ralstonite \Ral"ston*ite\ (r[add]l"st[u^]n*[imac]t), n. [So named after J. G. Ralston of Norristown, Penn.] (Min.) A fluoride of alumina and soda occurring with the Greenland cryolite in octahedral crystals. [1913 Webster]