資料來源 : pyDict

氟鈉鎂鋁石

資料來源 : Webster's Revised Unabridged Dictionary (1913)

Ralstonite \Ral"ston*ite\, 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.