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Webster 1913 Edition

(ra̤l′stŭn-īt)

Noun.

[So named after

J. G.

Ralston

of Norristown, Penn.]

(Min.)

A fluoride of alumina and soda occurring with the Greenland cryolite in octahedral crystals.

ralstonite

(mineralogy) An isometric-hexoctahedral mineral containing aluminum, fluorine, hydrogen, magnesium, oxygen, and sodium.

ralstonite Barthelmy, David (accessed 29 August 2016) Webmineral Mineralogy Database