durangite

durangite

[də′ran‚jīt]
(mineralogy)
NaAlF(AsO4) An orange-red, monoclinic mineral consisting of a fluoarsenate of sodium and aluminum; occurs in crystals.
References in periodicals archive ?
Since that time both areas have yielded an ongoing bonanza of beautiful crystals of topaz and beryl as well as other minerals including bixbyite and rare species such as durangite.