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Webster 1913 Edition

(fä′lŭn-īt)

Noun.

[From

Fahlun

, a place in Sweden.]

(Min.)

A hydrated silica of alumina, resulting from the alteration of iolite.

, n.

Automalite, a subspecies of octahedral corundum.

fahlunite ‎(usually uncountable, plural fahlunites)