• Monazite | mineral | Britannica

    Monazite, phosphate mineral, cerium and lanthanum phosphate, (Ce, La)PO4, that is the major commercial source of cerium. Occurring as small, brown, resinous, rather heavy crystals in granitic and gneissic rocks and their detritus (called monazite sands), monazite frequently contains 10–12 percent

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  • MONAZITE (Cerium Lanthanum Thorium

    Thorium is a highly radioactive metal and could be used as a replacement for uranium in nuclear power generation. Monazite therefore is an extremely important ore mineral. Monazite is radioactive, sometimes highly radioactive, and specimens are often metamict. This is a condition found in radioactive minerals and results from the destructive effects of its own radiation on its crystal lattice

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  • Monazite

    Monazit Chemische Formel siehe Einzelminerale Mineralklasse Phosphate, Arsenate, Vanadate 8.AD.50 (8. Aufl.: VII/A.15 (Monazit Gruppe)) (nach Strunz) 38.4.3 (Monazit Gruppe) (nach Dan

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  • Mineralienatlas Lexikon - Monazite

    Mineral Data, Mineralienatlas Lexikon, Monazite. Mineralienatlas - Fossilienatlas. Übersicht Startseite Linkliste The basis for chemical microprobe dating of minerals accumulating uranium and thorium. Doklady Earth Sciences Volume 437, Number 2 (2011) S.469-472. David J. Turner, Benoit Rivard, Lee A. Groat: Visible and short-wave infrared reflectance spectroscopy of REE phosphate minerals

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  • Monazite - an overview | ScienceDirect Topics

    The mineral monazite, a uranium- and thorium-rich phosphate of a rare-earth element (REE), is a common accessory mineral in a variety of felsic igneous rocks and is a common trace constituent in many metamorphic rocks, particularly metapelites. Because of its high uranium and thorium content, and fairly low common lead content, it has often been dated using ID-TIMS and IMP techniques. In the

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  • Mineralienatlas Lexikon - Monazite

    Mineral Data, Mineralienatlas Lexikon, Monazite. Mineralienatlas - Fossilienatlas. Übersicht Startseite Linkliste The basis for chemical microprobe dating of minerals accumulating uranium and thorium. Doklady Earth Sciences Volume 437, Number 2 (2011) S.469-472.

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  • Thorium Geology and Mineralogy of Occurrences

    The most common ore mineral of thorium is monazite [(Ce,La,Nd,Th)PO 4], a common accessory mineral occurring in small amounts, a percent or less, in granites and related igneous rocks. This monazite can contain several percent ThO 2 substituting for light rare earth elements (LREE). Other primary ore minerals of thorium are thorianite [ThO 2] and

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  • Thorium Geology and Mineralogy of Occurrences

    The most common ore mineral of thorium is monazite [(Ce,La,Nd,Th)PO 4], a common accessory mineral occurring in small amounts, a percent or less, in granites and related igneous rocks. This monazite can contain several percent ThO 2 substituting for light rare earth elements (LREE). Other primary ore minerals of thorium are thorianite [ThO 2] and thorite [ThSiO 4]. Thorium also will

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  • Monazite - chemeurope.com

    In geology, the mineral monazite is a reddish-brown phosphate containing rare earth metals and an important source of thorium, lanthanum, and cerium. It occurs usually in small isolated crystals. There are actually at least four different kinds of monazite, depending on relative elemental composition of the mineral: monazite-Ce (Ce, La, Pr, Nd, Th, Y)PO 4; monazite-La (La, Ce, Nd, Pr)PO 4

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  • Chemical and Mineralogical Characterization of

    Chemical and mineralogical characterization of Malaysian monazite, a phosphate mineral, bearing rare earth elements separated from the tin tailings originated from Ipoh, Perak, Malaysia, was performed in this paper. The study aims to collect detailed information on the chemical composition, crystal phases, and microstructure of the mineral monazite concentrate that would aid to optimize the

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  • Monazite | Elite Dangerous Wiki | Fandom

    Monazite is a reddish-brown phosphate mineral containing thorium and sometimes uranium, making it radioactive. — In-Game Description Monazite is a rare mineral Mineral Commodity that can be mined from Hotspots in Planetary Ring Systems. Notes Monazite was added in Elite Dangerous: Beyond Chapter Four (3.3).

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  • Locations of Deposits

    Thorium is mined in conjunction with uranium, so much that estimates of reserves for these elements are made based off of uranium content. Thorium is typically found in the minerals thorite, thorianite and monazite however monazite is the only mineral from which Thorium is currently mined. These monazite deposits are found in placer deposits.

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  • Mineral Sands: NORM Appendix - World Nuclear

    Western Australian mineral sands deposits contain up to 10% heavy minerals, of which 1-3% is monazite. This in turn typically contains 5-7% of radioactive thorium and 0.1-0.3% of uranium, which is barely radioactive. However, if decay products of either are present in the minerals, the radioactivity levels may be significant when the monazite is concentrated.

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  • Thorium - Wikipedia

    Monazite is a chemically unreactive mineral that is found as yellow or brown sand; its low reactivity makes it difficult to extract thorium from it. Allanite (chiefly silicates-hydroxides of various metals) can have 0.1–2% thorium and zircon (chiefly zirconium silicate, ZrSiO 4 ) up to 0.4% thorium.

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  • EXTRACTION OF RARE EARTH METALS FROM MONAZITE MINERAL

    Extraction of Rare Earth Metals from Monazite Mineral Using Acid Method, Isyatun Rodliyah et. al Monazite mineral sand H 2SO 4 Leaching Ice Quenching Filtration leachate Precipitation NH 4OH Filtration Leachate REE-pirophosphate NaOH precipitation Hot water Filtration REE-OH lump Calcination REE-oxides Precipitated REE-OH Figure 1.

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  • Monazite - WikiMili, The Best Wikipedia Reader

    Monazite is a reddish-brown phosphate mineral containing rare-earth metals.To be more specific, it represents a group of minerals. [3] The most common species of the group is monazite-(Ce), that is, the cerium-dominant member of the group. [4] It occurs usually in small isolated crystals.It has a hardness of 5.0 to 5.5 on the Mohs scale of mineral hardness and is relatively dense, about 4.6 to

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  • Thorium - AIMR 2011 - Australian Mines Atlas

    Most of the known thorium resources in Australia are in the rare earth-thorium phosphate mineral monazite within heavy mineral sand deposits, which are mined for their ilmenite, rutile, leucoxene and zircon content. Prior to 1996, monazite was being produced from heavy mineral sand operations and exported for extraction of rare earths and thorium. However, in current heavy mineral sand

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  • Thorium: Issues and prospects in Malaysia -

    In Malaysia, thorium exists in minerals and rare earth elements production residue. The average range of thorium content in Malaysian monazite and xenotime minerals was found about 70,000 and 15,000 ppm respectively. About 2,636 tonnes of Malaysian monazite was produced for a period of 5 years (2006-2010) and based on the above data, it can be estimated that Malaysian monazite contains

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  • Monazite solubility and dissolution kinetics:

    A series of monazite dissolution experiments was conducted in a hydrous (1–6 wt.%) granitic melt at 8 kbar over the temperature range 1,000–1,400° C. A polished cube of monazite was immersed in a natural obsidian melt and allowed to partially dissolve. Electron microprobe traverses perpendicular to the crystal-melt interface revealed concentration gradients in the LREEs and P

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  • Thorium in Australia – Parliament of Australia

    The main source of thorium in Australia and worldwide is the mineral monazite which is a reddish-brown rare-earth phosphate mineral. [7] Monazite contains 8 10 per cent thorium. [8] Other minerals containing thorium include thorite (thorium silicate), a thorium uranium mineral which is also an important ore of uranium and thorianite which contains around 70 per cent thorium dioxide.

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  • THORIUM Occurrences, Geological Deposits and Resources

    • Monazite in heavy mineral or black sands (placers) may be a major source of Th. • Monazite treated by conc. sulfuric acid, 120-190 0 C, several h, solutions enriched in Th several stages of treatment using organic compounds (amine), stripping and final separation of clean Th, precipitation. Availabilityof Thorium • Monazite production can be used as a measure for Th availability

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  • Thorite: The mineral Thorite information and

    Thorite is named for its content of the rare element thorium. It is isomorphous with Zircon and occurs in the same crystal habits. Thorite is the most prevalent mineral containing the radioactive element thorium. However, it is not as important as the primary thorium ore, Monazite, since the extraction process of the ore from Thorite is more difficult then that of Monazite.

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  • monazite - boowiki.info

    Monazite est un minerai important pour le thorium, le lanthane et le cérium. Souvent, il a trouvé dans dépôts alluvionnaires. Les dépôts en Inde Ils sont particulièrement riches en monazite. Il a dureté 5,0 à 5,5 et il est relativement épais, d'environ 4,6 à 5,7 g / cm 3.

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  • Indian Monazite – A Potential For Future Thorium Energy

    For Future Thorium Energy D SINGH CHAIRMAN AND MANAGING DIRECTOR INDIAN RARE EARTHS LIMITED, MUMBAI Thorium Energy Conference, 2018 . Indian Monazite – A Potential For Future Thorium Energy The statements in this presentation represent the considered views of the Indian Rare Earths Ltd (IREL). It includes certain statements that may be deemed "forward-looking

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