hewettite

hewettite

[′hyü·ə‚tīt]
(mineralogy)
CaV6O16·9H2O A deep-red mineral composed of hydrated calcium vanadate; found in silky orthorhombic crystal aggregates in Colorado, Utah, and Peru.
References in periodicals archive ?
Associated minerals are: opal, carbonate-fluorapatite and hewettite.
The specimens consist of blue micro-spheres of nevadaite associated with microcrystals of fluellite and hewettite.
Goldquarryite is a latestage supergene mineral associated with opal, carbonate-fluorapatite and hewettite, on a host rock composed principally of brecciated and hydrothermally rounded jasperoid fragments which have been lightly cemented by late-stage silicification.
Hewettite, in radiating sprays (to 10 mm) of lustrous maroon-red fibrous crystals, and goldquarryite were the last minerals to form, and oc cur as isolated clusters on and between breccia fragments; the two species do not occur in immediate association and their paragenetic relationship is not known.
Associated minerals are: pascoite, sherwoodite, selenium, bariandite, devilline, rossite, hewettite, carnotite, clausthalite, coffinite, tyuyamunite, uraninite, corvusite, montroseite, roscoelite, galena, pyrite and tennantite.
Among those identified are burangaite (second world occurrence), corderoite, fervanite, fluellite, hewettite, heyite, kazakhstanite, mandarinoite, richellite, schubuelite (second world occurrence), sincosite, tinticite (in crystals
Radiating sprays of brilliant maroon-red hewettite crystals, lustrous golden yellow fluellite crystals, and dense mats of intergrown selenium crystals are only a few of the interesting discoveries made recently.
Associated (later) minerals include variscite, fluellite, leucophosphite, unknown #1, hewettite, tyuyamunite, torbernite and tiemannite/ corderoite, commonly all on the same specimen.
2 mm occur rarely as an associated mineral with wavellite, fluellite, aluminian strengite and hewettite.
The species occurs as bright orange-red pulverulent patches to 1 mm on colorless gypsum overgrowths on hewettite crystals.
Associated crystallized species may include wavellite, hewettite, tyuyamunite, torbernite, leucophosphite, anatase, tinticite, phosphofibrite, blue unknown #1 and strengitevariscite.
Exceptionally well-crystallized hewettite found at the Gold Quarry mine constitutes both a new type of occurrence for this species, and the first one documented from Nevada.