Xenotime Composition

The chemical composition of xenotime form fissures and pegmatites in the Alps Franc Demartin; Franc Demartin ... Xenotime-(Yb), YbPO 4, a new mineral species from the Shatford Lake pegmatite group, southeastern Manitoba, Canada The Canadian Mineralogist. A comparative study of some pegmatitic and fissure monazite from the Alps ...

A broad array of geochemical and geochronological applications can take advantage of the links between xenotime composition and texture and the evolution of silicate–mineral assemblages in a diversity of environments. One example of metasomatised xenotime from a pegmatite in SW Norway demonstrates a practical application to dating …

Xenotime composition. Representative EMPA of xenotime are presented in Table 4. Microprobe analyses often reveal, analogous to zircon, low totals suggesting hydration of xenotime. The water content estimated from analytical data ranges from 1 to 11 wt. % H 2 O. The F content in xenotime is similar to that measured in zircon and reaches up to 2. ...

The crystal chemistry and crystal structure of the rare earth element phosphates, monazite-(Ce), Ce(PO 4), and xenotime-(Y), Y(PO 4), as well as the arsenates, gasparite-(Ce), Ce(AsO 4), and chernovite-(Y), Y(AsO 4), from the hydrothermal quartz-bearing fissures, related to pegmatites overprinted by amphibolite facies, cropping out at Mt. Cervandone, Western …

Xenotime-(Y) YPO4 c 2001-2005 Mineral Data Publishing, version 1 Crystal Data: Tetragonal. Point Group: 4/m2/m2/m. ... C.M. Gramaccioli (1991) The chemical composition of xenotime from fissures and pegmatites in the Alps. Can. Mineral., 29, 69–75. (4) Y. Ni, J.M. Hughes, and A.N. Mariano (1995) Crystal

Thorite–xenotime solid solutions of intermediate composition may form individual grains of larger size, rarely approaching 150 μm. Compositional variation at the scale of a single grain is not systematic, but irregular and associated with patchy zonation.

The composition, lattice parameters, and elastic constants of natural single crystal YPO 4 xenotime from Novo Horizonte (Brazil) were determined using EPMA, XRD, and the pulse-echo technique. The composition indicates a 24% substitution of Y sites with other rare-earth elements. The lattice parameters of the studied crystal deviated only slightly from those …

Composition: Molecular Weight = 240.21 gm Lanthanum 14.46 % La 16.95 % La 2 O 3 Cerium 29. 17 % Ce 34. ... (1995) p.21-26, Crystal chemistry of the monazite and xenotime structures . View Additional jPOWD Structure files for Monazite-(Ce) Physical Properties of Monazite-(Ce) Cleavage: {001} Distinct, {100} Indistinct : Color: Brown, Colorless ...

Xenotime (YPO4), a significant phosphatic minerl rich in heavy rare earth elements (HREEs), typically associates with granitic rocks, exemplified in the Wolverine rare earth deposit in Australia. A mineral composition analysis indicates that the primary valuable minerals in the deposit are principally xenotime and minor florencite, with quartz and illite as the main gangue …

Xenotime (HREE-selective), florencite (LREE-selective) and zircon are characterised. ... (LA–ICP–MS) were used to discern mineral composition and element partitioning, e.g., between xenotime and coexisting florencite. EPMA data was obtained using a CAMECA SX-51 instrument with wavelength-dispersive spectrometers at Adelaide Microscopy, ...

If monazite and xenotime can be altered by specific fluid compositions during metamorphism, evidence for the alteration as well as the nature of the alteration could provide information on the composition and physical nature of the fluids involved. Since monazite and xenotime are important geological repositories for P, Th, U, REE and Y,

Xenotime could also undergo coupled dissolution-reprecipitation reactions, resulting in compositional alterations that affected the age record (e.g., Rasmussen et al. 2011;Fielding et al. 2017 ...

Xenotime is very selective towards HREE and Y. EPMA and LA–ICP–MS analysis revealed that HREE (notably Dy, Er, Gd and Yb) and Y occur predominantly within xenotime and that the xenotime composition is consistent across all prospects and xenotime generations with the exception of some grain margins, which are particularly rich in

(3) Demartin, F., T. Pilati, V. Diella, S. Donzelli, P. Gentile, and C.M. Gramaccioli (1991) The chemical composition of xenotime from fissures and pegmatites in the Alps. Can. Mineral., 29, …

Semantic Scholar extracted view of "Understanding geologic processes with xenotime: Composition, chronology, and a protocol for electron probe microanalysis" by C. Hetherington et al. Skip to search form Skip to main content Skip to account menu. Semantic Scholar's Logo. Search 222,241,716 papers from all fields of science ...

Monazite and xenotime U-Th-Pb total dates and compositions were acquired with the Cameca SX-Ultrachron electron microprobe at the University of Massachusetts-Amherst (Hetherington et al., 2008;M ...

Xenotime and monazite are common trace mineral phases in granite, pegmatite, hydrothermally altered rocks, and medium-to high-grade metamorphic rocks, where they are frequently employed to date ...

This study investigates the paragenesis and ore mineral composition of xenotime [(Y,HREE)PO4] and florencite [LREEAl3(PO4)2(OH)6] from heavy rare earth element (HREE) deposits/prospects of the ...

To maximise the petrographic potential of xenotime, a complete understanding of its composition and relationship to rock-forming assemblages is essential. Electron beam techniques provide...

Found in the saccharoidal albite unit of a granitic pegmatite. Forms a series with xenotime- (Y). Shatford Lake pegmatite group, near the margin of the Lac du Bonnet batholith, southeastern …

Forms a series with xenotime-(Y). IMA Status: Approved IMA 1999 (Dana # Added) Locality: Shatford Lake pegmatite group, near the margin of the Lac du Bonnet batholith, southeastern Manitoba. Link to MinDat Location Data. Name Origin: Named after its composition and relationship with xenotime-(Y). Name Pronunciation: Xenotime-(Yb) Synonym:

The component of W-xenotime from tungstite is complicated, and the content of tungsten is higher than that of rare earth elements with higher contents of iron, silicon impurities, etc. Tables 1.50 and 1.51 list the composition of two concentrates and the partition of rare earth elements.

links between xenotime composition and texture and the evolution of silicate–mineral assemblages in a diversity of environments. One example of metasomatised xenotime from a pegmatite in SW Norway

Visit gemdat for gemological information about Xenotime. Paleoarchean to Carboniferous : 3266 ± 3 Ma to 316 ± 3 Ma - based on 24 recorded ages. Data courtesy of the American …

Xenotime describes a group of several closely related phosphates, arsenates, and vanadates composed of rare earth elements. The term is generally used to describe the most common …

Xenotime is an analogous mineral phosphate of Y3+ which is generally rich in heavier rare-earth ions. You might find these chapters and articles relevant to this topic. Dezhi Qi, in …

A comprehensive study of monazite–cheralite–huttonite solid solutions (s.s.) and xenotime from the highly evolved, strongly peraluminous P–F–Li-rich Podlesí granite stock in the Krušné ...

The magmatic xenotime underwent intense secondary alteration, from rims inwards, resulting in the formation of inclusion-rich well crystalline xenotime domains of near end-member composition. Two types of recrystallization were distinguished in relation to the type of inclusions: i) xenotime with coffinite-thorite, cheralite and monazite ...

In this study a Th-bearing monazite from a Brazil beach sand, a low Th monazite from a Malawi carbonatite, and a xenotime from a pegmatite in northern Pakistan were experimentally metasomatised in a series of common metamorphic and igneous fluids at 600°C/500 MPa and 900°C/1000 MPa. Fluids included H2O, NaCl, and KCl brines, CaF2 + …

This sample of xenotime is displayed in the Smithsonian Museum of Natural History. Xenotime is a phosphate mineral of yttrium with the composition YPO 4. The sample at left is about 2x2 cm and is from Iveland, Aust-Agder, Norway.