...M. L. Lindberg; W. T. Pecora Abstract Two more new phosphate minerals—tavorite and barbosalite—have been discovered in the Sapucaia pegmatite mine in Minas Gerais, Brazil. Three other minerals recently described were named frondelite, faheyite, and moraesite. The Sapucaia pegmatite is granitic...

... is replaced by an intimate mixture of pleochroic Ca-rich hureaulite and tavorite. After this hydroxylation stage, the meteoric stage is characterized by an increase in Ca 2+ and H 2 O activities, responsible for the replacement of hureaulite and tavorite by mitridatite-robertsite. At the nodule border...

... and minor tavorite as coatings on fractures of lithiophilite; stewartite, massive or in rare crystals; mitridatite (a hydrous calcium iron phosphate), in deep red blades, or very fine grained masses yellowish to greenish in color. A new mineral, chavesite is described. It is a hydrous calcium manganese...

... crystallization of ferrisicklerite and heterosite; (ii) a hydration stage transforms triphylite into hureaulite, barbosalite, and tavorite, and (iii) a final stage, corresponding to meteoric alteration, the latest highly hydrated phosphate and oxide species. In assemblage I, ferrisicklerite is replaced...

..., rockbridgeite, huréaulite, tavorite, reddingite, heterosite, laueite, and unidentified minerals. Additional occurrences of lindbergite are from Parsettens, Grisons, Switzerland, the Lecht Mines, Banffshire, Scotland, and the Morefield Pegmatite, Amelia, Virginia. Lindbergite also has been recorded from three...

... with X = pale orange brown, Y = light purple, and Z = dark purplish red; absorption: Z > Y > X, X = b . Tinsleyite is associated with leucophosphite, rockbridgeite, tavorite, carbonate-apatite, and robertsite in highly altered triphylite pods in the pegmatite. Tinsleyite is chemically the Al...

...A.-M. Fransolet; P. Tarte Abstract Twenty-six analyzed samples in the amblygonite-montebrasite series LiAlPO 4 (F 1− x OH x ) and one of tavorite LiFePO 4 (0H) have been investigated by infrared spectroscopy in the 4000–300 cm −1 region. The 830–800 cm −1 band is reassigned to a bending vibration...

..., in the central part of the body isolated pods and masses occur of either primary Mn-poor triphylite or Fe-poor triplite, each of them up to several tons of weight. Purpurite, rockbridgeite, tavorite, barbosalite, hureaulite, eosphorite, phosphosiderite, and several others were observed as alteration products...

.... 1953 ), barbosalite, Fe 2+ Fe 3+ 2 (PO 4 ) 2 (OH) 2 , tavorite, LiFe 3+ PO 4 (OH) ( Lindberg & Pecora 1954 , 1955 ), and arrojadite-(PbFe), [PbFe 2+ Na 2 Ca(Fe 2+ , Mn,Mg) 13 Al(PO 4 ) 11 (PO 3 OH)(OH,F) 2 ( Chopin et al. 2006 ). Detailed studies of the phosphate mineral associations...

... (PO 4 ) 2 O 2 ·3H 2 O o + Tavorite LiFe 3+ (PO4)(OH) + o Dufrénite Ca 0,5 Fe 2+ (Fe 3+ ) 5 (PO 4 ) 4 (OH) 6 ·2H 2 O + o LS: lithiophilite–sicklerite association; BWS: beusite–wyllieite–sicklerite association. The abundance in each association is given as: ++++: abundant, +++: c o...

.... 2009 ). In pegmatite settings, the mineral is a product of hydrothermal alteration of primary triphylite (LiFePO 4 ). Keller (1980a) identified it as part of a paragenetic or age sequence of triphylite → hureaulite → (an unidentified dark green mineral + giniite) → tavorite → leukophosphite. Keller...

... mica KLiMg 2 Si 4 O 10 F 2 37 1,750 Alkalic rocks Rossmanite tourmaline ☐(LiAl 2 )Al 6 (Si 6 O 18 )-(BO 3 ) 3 (OH) 3 OH 35 2,640 LCT pegmatite Tavorite amblygonite LiFe 3+ PO 4 (OH) 34 1,702 LCT pegmatite * LCT = Li–Cs–Ta F rom G rew et al . (2019). Figure 1...

... are: triphylite, phosphosiderite, frondelite, strengite, cyrilovite, bermanite, rockbridgeite, huréaulite, tavorite, reddingite, heterosite, laueite and unidentified minerals. General appearance : Short prismatic crystals 0.1 to 0.3 mm long and aggregates 0.1 mm thick made up of interlocking platelets up...

...), pseudoautunite, sincosite, strengite, tavorite, thadeuite, tiptopite, viitaniemiite, vyacheslavite and zodacite. Barbosalite, benauite, bergenite, bleasdaleite, brockite, carbonate-fluorapatite, cheralite-(Ce), delvauxite, embreyite, gladiusite, kastningite, kidwellite, kingite, metaschoderite...

... of other cation substitutions are negligible. Although tavorite (LiFe 3 +PO 4 F) is isostructural with amblygonite, it only occurs as an alteration product of primary phosphates in pegmatites; consequently, Al ↔ Fe substitution in amblygonite-montebrasite is rare to nonexistent ( Cerná et al. 1973...

.... , Bamine T. , Carlier D. , Serras P. , Palomares V. , Rojo T. , Iadecola A. , Dupont L. and Bourgeois L. ( 2017 ) Vanadyl-type defects in tavorite-like NaVPO 4 F: from the average long range structure to local environments . Journal of Material Chemistry A , 5...

... phosphates including heterosite, wolfeite, arrojadite, beryllonite, alluaudite, amblygonite, hydroxylherderite, vivianite, ludlamite, rockbridgeite, phosphosiderite and tavorite are common in miarolitic cavities and in metre-scale blocks that are formed by the alteration of primary triphylite ( Cassedanne...