fluellite

fluellite

[′flü·ə‚līt]
(mineralogy)
AlF3·H2O A colorless or white mineral composed of aluminum fluoride, occurring in crystals.
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The receipt of a box of his minerals was acknowledged by Wright in May: he was "very much pleased with many of them." Wright's return box was dispatched in June and contained 110 specimens, including many supergene lead and copper minerals (pyromorphite, mimetite, linarite, caledonite, cerussite, etc.), barite, witherite, fluorite, and the Cornish rarity, fluellite. A return box from Jefferis arrived later that same year.
The specimens consist of blue micro-spheres of nevadaite associated with microcrystals of fluellite and hewettite.
Locally abundant specimens of large and well-crystallized wavellite, fluellite and minyulite are present in quartz crystal-lined vugs, along with other minerals including native selenium, and a suite of associated phosphates.
A carbonaceous and sulfide-bearing shale horizon just barely exposed at the bottom of the northernmost pit of the Willard mine contains excellent wavellite, fluellite and minyulite.
It is the site of the first discovery of minyulite in Nevada; it has produced the world's largest crystals of fluellite and perhaps also minyulite; and it has furnished what are by far the finest quality specimens of wavellite, fluellite and minyulite ever discovered in the state.
Fluellite [Al.Sub.2][(PO.sub.4)][F.sub.2](OH)[*7H.sub.2O]
Magnificent, mirror-lustrous crystals of colorless to pale lavender fluellite have been found at the Willard mine.
Minerals in the pegmatite are: quartz, microcline, muscovite, albite, amblygonite, "apatite," beryl, uraninite, elbaite, members of the tantalite group, secondary uranium minerals, triphylite, triplite, purpurite, rockbridgeite, tavorite, barbosalite, hureaulite, eosphorite, phosphosiderite, carlhintzeite, colquirite, pachnolite, ralstonite and fluellite. Serrabrancaite is an alteration product of triplite and is closely associated with vernadite.
Among those identified are burangaite (second world occurrence), corderoite, fervanite, fluellite, hewettite, heyite, kazakhstanite, mandarinoite, richellite, schubuelite (second world occurrence), sincosite, tinticite (in crystals!) and many others.
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.
At location 1 on the 5,425 bench, lustrous, colorless calcite rhombs to 0.2 mm occur rarely as an associated mineral with wavellite, fluellite, aluminian strengite and hewettite.