triphylite


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triphylite

(ˈtrɪfɪˌlaɪt)
n
(Minerals) a bluish-grey rare mineral that consists of lithium iron phosphate in orthorhombic crystalline form and occurs in pegmatites. Formula: LiFePO4
[C19: from tri- + phyl-, from Greek phulon family + -ite1, referring to its three bases]
References in periodicals archive ?
The adjacent LCT beryl-columbite pegmatites at Morrissey Hill, Beryl Hill and Pyramid Hill only rarely contain lithium minerals such as lepidolite, elbaite and triphylite.
After the late 1960's, however, industrial mining gave way to disciplined explorations by mineralogists and collectors--for the Palermo pegmatite is one of the world's sacred places to those interested in the rich suite of secondary phosphates which have formed from the alteration of pegmatitic apatite and triphylite.
The chapter title "Palermo Minerals" sets up the book's second half by introducing a 20-page section composed of (1) lists and tables detailed enough to get down to things like which species occur in which individual triphylite pods; (2) a color cross-section of the mine with plastic overlays showing collecting sites, and (3) what is perhaps the book's most surprising feature to come on unawares, an Index to Minerals with page numbers and species names keyed to little paintings of crystal specimens.
Lithiophilite is the principal primary phosphate mineral (Shigley and Brown, 1985), but amblygonite, triplite, and triphylite (possibly misidentified lithiophilite, A.
Phosphate minerals include primary lithiophilite, triphylite, and amblygonite, and numerous alteration products including hureaulite, purpurite, and sicklerite.
Cerro Sapo Amesite-2H, analcime, ankerite, barite, chalcopyrite, dawsonite, galena, natrolite, nordstrandite, sodalite Cerro Ubina Bismuthinite, Pyrite, tourmaline Cerro Vilacota Barite, galena Chacaltaya Arsenopyrite, cassiterite, fluorite, muscovite, nacrite, ullmannite (As-rich "korynite"); see San Carlos 2 Chacarilla Copper, chalcocite, malachite Chajolpaya Cassiterite Challahuilque Chlorargyrite Challana In the vicinity are found columbite, heteosite, rutile, spodumene, triphylite, triplite, see Fabulosa Challapata Chalcostibite, teallite, wurtzite, See Terremoto, Vicunita Challviri Stibnite Chambillaya Apatite, arsenopyrite, quartz twins, wolframite Chayanta Apatite, cassiterite, silver; see Capacirca, Pucro, Vila Apacheta Chicote Chico Wolframite.
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.
The central part of the zoned pegmatite, where open-pit mining once exploited beryl, is composed essentially of giant-size perthite masses containing numerous books of pale muscovite, an irregular framework of quartz, several elongated and fluted masses of industrial-grade beryl, large laths of white weathered spodumene to more than 2 meters in length, and (branching) vein-like masses of triphylite to several tons in weight.
Hydrothermal fluids generated within the pegmatite produced a wide variety of secondary minerals in the form of spherulitic masses, fibers, needles and well-formed crystals in cavities within or adjacent to beryl, muscovite, quartz, triphylite and other minerals.
These include isolated, somewhat brecciated pods of phosphate minerals up to a meter across composed predominantly of lithiophilite and albite with lesser amounts of triploidite, triplite and triphylite.
Triphylite and other phosphates were described from here in the early 1940's.
Dennis Durgin of Hebron end victor Haverinen of Paris worked the Mount Marie quarry near Paris and found a large suite of minerals including petalite cleavages to 20 cm, dark mauve cookeite crystals (to several mm) in clusters to 5 cm, blocks of purple lepidolite (to 30 cm), brown color-zoned microlite crystals (to 5 mm), and a well-formed 7-cm heterosite pseudomorph after triphylite.