 | Shimazaki, Hidehiko, Yang, Zhuming, Miyawaki, Ritsuro, Shigeoka, Masako (2008) Scandium-Bearing Minerals in the Bayan Obo Nb-REE-Fe Deposit, Inner Mongolia, China. Resource Geology, 58 (1) 80-86 doi:10.1111/j.1751-3928.2007.00045.x | Journal (article/letter/editorial) | | Scandium-Bearing Minerals in the Bayan Obo Nb-REE-Fe Deposit, Inner Mongolia, China Hidehiko Shimazaki1, Zhuming...Beijing, China Abstract Aegirine, âperrierite-(Ce)â, and ferrocolumbite, occurring in the Bayan Obo Nb-REE-Fe...Nb-REE-Fe deposit in Inner Mongolia, China, contain appreciable amounts of scandium. The Sc2O3 content in...average value of 1.19%. The Sc2O3 content of âperrierite-(Ce)â (TS-20) was 2.82â3.64% with an average value...by-product from the deposit. Keywords: Aegirine, Bayan Obo, ferrocolumbite, âperrierite-(Ce)â, scandium. 1 |  | Macdonald, Ray, BagiĆski, BogusĆaw, Belkin, Harvey E., Stachowicz, Marcin (2019) Composition, paragenesis, and alteration of the chevkinite group of minerals. American Mineralogist, 104 (3) 348-369 doi:10.2138/am-2019-6772 | Journal (article/letter/editorial) | | REE production held by the Peopleâs Republic of China, has led to much REE exploration worldwide. For...been described as the main REE carrier in any deposit, they may be present in the REE ore (e.g., Li and...MO6 coordination. In the asymmetric unit of the perrierite-type structure, there are two A sites (A1 and...abundant members of the group are chevkinite and perrierite, which are structurally different. Haggerty and...(chevkinite ~100°, perrierite ~113°). The CGM could then be divided into the chevkinite and perrierite subgroups |  | Macdonald, R., BagiĆski, B., Kartashov, P., Zozulya, D., DzierĆŒanowski, P. (2012) Chevkinite-group minerals from Russia and Mongolia: new compositional data from metasomatites and ore deposits. Mineralogical Magazine, 76 (3) 535-549 doi:10.1180/minmag.2012.076.3.06 | Journal (article/letter/editorial) | | 535â549 Chevkinite-group minerals from Russia and Mongolia: new compositional data from metasomatites and...apatite deposit, are presented. The mineral species analysed include chevkinite-(Ce), perrierite-(Ce), polyakovite-(Ce)...polyakovite-(Ce) and Sr- and Zr-rich perrierite-(Ce). Compositional variation in the Sr-rich members of... Despite the varied parageneses, the chevkinite-(Ce) compositions are similar to previously published...hydrothermal alteration, chevkinite-(Ce), perrierite-(Ce), polyakovite-(Ce). Introduction CHEVKINITE-GROUP |  | | | | crystals from Virginia and Guatemala contain both perrierite and chevkinite compositions. The new and published...review compositional variation in minerals of the perrierite subgroup, which can form in a wide range of host...are described. K EY WORDS : chevkinite-group, perrierite, metamictization, distribution. Introduction...chevkinite group of minerals, chevkinite and perrierite, closely approaches the ideal formula A4BC2D2Si4O22...Gottardi, 1966; Ito, 1967). Compared to chevkinite, perrierite is distinguished by smaller FeO* (with total |  | | Journal (article/letter/editorial) | | deposits formed along a paleo island arc in the east Magnitogrosk zone of the Southern Urals between...ratio of the length to the maximum width of the deposit >15 and are characterized by ribbon- like layers...principally of altered fine clastic ore facies. The Jusa deposit appears to have formed in two stages: deposition...gold and silver. The low metamorphic grade of the east Magnitogorsk zone accounts for the exceptional degree...S., Espinoza, S. & Definis, A. AngĂ©lica copper deposit: Exotic type mineralization in the Tocopilla plutonic | | | | | granulite-facies metamorphic rocks and associated pegmatites of East Antarctica and South India H. E. BELKIN1,*, R. MACDONALD2...Napier Complex and Mawson Station charnockite in East Antarctica and from the Eastern Ghats, South India...Fe2+, Fe3+, Zr) and D = Ti and plot within the perrierite field of the total Fe (as FeO) (wt.%) vs. CaO...Mg/Fe ratios. K EY WORDS : chevkinite-group, perrierite, Antarctica, Eastern Ghats, India. Introduction...chevkinite group (Table 1), chevkinite-(Ce) and perrierite(Ce), are found in igneous rocks ranging from |  | | Journal (article/letter/editorial) | | ABSTR ACT The composition of chevkinite and perrierite, the most common members of the chevkinite group...expressed by the formula A4BC2D2Si4O22, where A = (La,Ce,Ca,Sr,Th), B = Fe2+, C = (Fe2+,Fe3+,Ti,Al,Zr,Nb)...a linear array with r2 = 0.91. Chevkinite and perrierite are shown to be compositionally distinct on the...fenites associated with carbonatite complexes. Perrierite is more commonly recorded from igneous rocks...are reviewed briefly. K EY WORDS : chevkinite, perrierite, compositional variation. Introduction T HE |  | Stachowicz, Marcin, Welch, Mark D., BagiĆski, BogusĆaw, Kartashov, Pavel M., Macdonald, Ray, WoĆșniak, Krzysztof (2019) Cation ordering, valence states, and symmetry breaking in the crystal-chemically complex mineral chevkinite-(Ce): Recrystallization, transformation, and metamict states in chevkinite. American Mineralogist, 104 (10) 1481-1486 doi:10.2138/am-2019-6458 | Journal (article/letter/editorial) | | the crystal-chemically complex mineral chevkinite-(Ce): Recrystallization, transformation, and metamict...at 750 °C of Nb-rich chevkinite-(Ce) from the Biraya rare-metal deposit, Russia, resulted in the structural...involves twinning of the crystals. Nb-rich chevkinite-(Ce) occurs naturally as two polymorphs, one with the...be divided into two subgroups: chevkinite and perrierite. The chevkinite-type structure is shown in Figure...from the empirical formula of Nb-rich chevkinite-(Ce) determined by electron microprobe, a short graphical |  | | Journal (article/letter/editorial) | | org/10.1007/s00269-020-01130-6 ORIGINAL PAPER Perrieriteâ(Ce) from the Laacher See tephra, Eifel, Germany...February 2021 © The Author(s) 2021 Abstract Perrierite-(Ce) crystals from ejecta of the Laacher See volcano...module, the preferred formation of either the perrierite or the chevkinite structure type is correlated...chevkinite-type module stacking. It can drop to zero in perrierite-type structures rich in Sr or Ca. In such cases...generally not expected to rise above two. The perrierite-(Ce) described in this study crystallizes in space |  | Deady, Eimear, Lacinska, Alicja, Goodenough, Kathryn, Shaw, Richard, Roberts, Nick (2019) Volcanic-Derived Placers as a Potential Resource of Rare Earth Elements: The Aksu Diamas Case Study, Turkey. Minerals, 9 (4) 208 doi:10.3390/min9040208 | Journal (article/letter/editorial) | | production of REE is dominated by hard-rock mining, particularly in China, which typically requires high energy...known for many years, and require less energy than mining of hard rock, but the REE ore minerals are typically...reworked into basinal sediments. This type of deposit may represent a potential resource of REE in other...carbonatite-hosted, including Bayan Obo in China [4,5], Maoniuping in China [6,7] and Mount Weld in Australia...Australia [2]. From the 1980s, China became the worldâs largest producer of REE, and by 2010 about 95% of |  | Amores-Casals, , Melgarejo, , Bambi, , Gonçalves, , Morais, , Manuel, , Neto, , Costanzo, , Molist, (2019) Lamprophyre-Carbonatite Magma Mingling and Subsolidus Processes as Key Controls on Critical Element Concentration in CarbonatitesâThe Bonga Complex (Angola) Minerals, 9 (10) 601 doi:10.3390/min9100601 | Journal (article/letter/editorial) | | fluorite [73], iron and pyrochlore [74], with many mining exploration operations currently in process. Pyrochlore...rutile (Ti, Kα, PETJ), LaB6 (La, Lα, PETJ), CeO2 (Ce, Lα, PETJ), corundum (Al, Kα, TAPH), periclase (Mg...with quartz replacements and are scarce. Parisite-(Ce) forms fine anhedral crystals less than 10 microns...ilmenorutile and synchysite-(Ce). Tiny radial aggregates of synchysite-(Ce) (Figure 4f) occur in ankerite...quartz. REE phosphates are less abundant. Rhabdophane-(Ce) forms botryoidal aggregates of fine radial fibres |  | | Book (edition) | | Helium Holmium Al Sb A As Ba Be Bi B Br Cd Ca C Ce Cs Cl Cr Co Cu Dy Er Eu F Gd Ga Ge Au Hf He Ho Hydrogen...BSFM BSF.\IC BS.'.\' CfSJ CA CCA CoC\l CCM CCR CE CJM CJC Aufschlus.s Boletin Fac11/tadde cienncia...Cand CSPG Pennskiye gubemskiye wdomo.sti (Perm district ga=elle) Pl,ilosopl,ical Maga=ine Periodico de...930-937, Science 223, 1075-1076 (str.) ⥠Abcnakiite-(Ce), Na2 lCc,REE) 0 (SiO 3 MPO,MCO;)iS'·o 2 )O, trig...Abernathyitc, K[(UO 2 )(AsO,)](HP) 3, tet., Fumerole No. 2 mine, Temple Mountain. on the southeast flank of the |  | Nagashima, Mariko, Armbruster, Thomas, Akasaka, Masahide, Sano-Furukawa, Asami, Nishio-Hamane, Daisuke, Malsy, Anna, Imaoka, Teruyoshi, Nakashima, Kazuo (2020) Multi-methodical study of the Ti, Fe2+ and Fe3+ distribution in chevkinite-subgroup minerals: X-ray diffraction, neutron diffraction, 57Fe Mössbauer spectroscopy and electron-microprobe analyses. Physics and Chemistry of Minerals, 47 (6). doi:10.1007/s00269-020-01096-5 | Journal (article/letter/editorial) | | Tangir Valley, Diamar District, Pakistan (No. 2) and Haramosh Mts., Skardu district, Pakistan, (No. 3) were... ÂFe3+, Ti)2Ti2(Si2O7)2O8] known for chevkinite-(Ce). Site scattering values determined by single-crystal...Combined results gave the simplified formulas with Ce as dominant REE: No. 1 A(REE,Ca)4M1(Fe2+,Ti)M2(Ti...and 175°. Outliers of this trend are delhuyarite-(Ce) ÂCe4Mg(Fe3+2W)âĄ(Si2O7)2O6(OH)2, mainly due to octahedral...Ti)2Ti2(Si2O7)2O8] classified into the chevkinite and perrierite subgroup, and each of which consists of six mineral |  | | Journal (article/letter/editorial) | | as trace elements), the REEs contribute 2.16% with Ce, Nd, Y, and La the most abundant at 32%, 17%, and...and 13% (Y and La) respectively of the total REE Ce, Nd, Y, and La the most abundant at 32%, 17%, and 13%...Gadolinite Gagarinite Hellandite Hingannite Huangoite-(Ce) Iimoriite Aes Aln * Anc Ap * Ast Bas Bri Bro Bur...{A12+ REE3+ }{M3+ 2 M32+ }(Si2 O7 )(SiO4 )O(OH) Sr(La,Ce)(CO3 )2 (OH)·(H2 O) (Ca, REE)5 (PO4 )3 (OH,F,Cl)...)2 (O,OH,F)7 (REE)(CO3 )F (Ce,Ca,Th,La,Nd)5 (SiO4 ,PO4 )3 (OH,F) (Ca,Th,Ce)(PO4 )·(H2 O) (Na,Ca)3 (Sr |  | Goodenough, K.M., Schilling, J., Jonsson, E., Kalvig, P., Charles, N., Tuduri, J., Deady, E.A., Sadeghi, M., Schiellerup, H., MĂŒller, A., Bertrand, G., Arvanitidis, N., Eliopoulos, D.G., Shaw, R.A., Thrane, K., Keulen, N. (2016) Europe's rare earth element resource potential: An overview of REE metallogenetic provinces and their geodynamic setting. Ore Geology Reviews, 72. 838-856 doi:10.1016/j.oregeorev.2015.09.019 | Journal (article/letter/editorial) | | yttrium (Y), terbium (Tb), lanthanum (La), and cerium (Ce) for phosphor-based ïŹuorescent lighting, smartphone...increasing demand (Du and Graedel, 2011), and thus mining of natural deposits is expected to continue as...REE entering the global market are produced in China (WĂŒbbeke, 2013), and the EU has to import virtually...individual rare earth metals. Once a rare earth deposit is identiïŹed, its geology and mineralogy must be...beneïŹciation methods have to be tailor-made for each deposit, and are dependent on properties such as mineralogy |  | | Journal (article/letter/editorial) | | Mineralogist Vol. 42, pp. 1013-1025 (2004) CHEVKINITE-(Ce): CRYSTAL STRUCTURE AND THE EFFECT OF MODERATE RADIATION-INDUCED...ABSTRACT The crystal structure of annealed chevkinite-(Ce), ideally (REE,Ca)4 Fe2+ (Ti,Fe3+,Nb)4 Si4 O22, monoclinic...041(1) Ă
, 100.516(1)°, V 830.7(2) Ă
3; Z = 2, from Mongolia, has been solved by direct methods and refined...and [10], in which Ce is dominant over other REE, Ca and Th. Keywords: chevkinite-(Ce), Ti-silicate, crystal...crystal structure, Mongolia, radiation damage. SOMMAIRE Nous avons rĂ©solu la structure cristalline de |  | | Journal (article/letter/editorial) | | end. Absorption coefficient, of quartz, 601 Acid mine drainage, leading to formation of a new mineral...BIGHAM,J.M., 641 Biotite (scapolite-) rocks, from China, implications for the ore forming processes, 543... R.G., 299 Ce anomaly, in some lavas from Hawaii, 589 Cell parameters, for perrierite-(Ce), 607 Chalcopyrite..., 185 Chayesite, in lamproites from Spain, 655 CHINA, halogen-rich scapolite-biotite rocks from Qinling...distortions in, 185 CURETON II, F.F., 417 Daqingshanite-(Ce), a high-precision crystal refinement of, 490 DELLAVENTURA |  | | Report (volume) | | formulas by the chemical symbol for either cerium (Ce) or yttrium VII MINERALS OF THE RARE EARTHS (Y);...for example, the formula for calkinsite is given as Ce 2 (C0 3 h · 4H 20. This does not mean that cerium...member. Some formulas, such as that of cordylite (Ce, LahBa (C0 3 ) 3 F 2 , are written so as to emphasize...element Cerium subgroup: Lanthanum (La) - Cerium (Ce) - - - Praseodymium (Pr)Neodymium (Nd) Promethium...- ·· Abukumalite - (Y, Ce, Ca) 5 (Si0 4 , P0 4 ) 3 (0, OH, F) Aeschynite - (Ce, Ca, Fe, Th) (Ti, Nb) 20 |  | | Journal (article/letter/editorial) | | 2/3, 2001 Special Issue on the Karst Regions of China Recent advancement of high-resolution aeromagnetic...composition of the Canton Saint-Onge wollastonite deposit, central Grenville province, CanadaâM.D. Higgins... 5, 2001 Komatiite-hosted Hunters Road nickel deposit, central Zimbabwe: Physical volcanology and sulfide...DE LA RECHERCHE MINIĂRE No. 541, December, 2000 Mining environment in India: Regional impact studiesâB...ultramafic enclaves from the Almaden mercury mining district, SpainâD. Morata, P. Higueras, S. DomingueqBella |  | | Journal (article/letter/editorial) | | occurrence and composition of chevkinite-(Ce) and perrierite-(Ce) in tholeiitic intrusive rocks and lunar...6102, Australia 1 Abstract Chevkinite-(Ce) and perrierite-(Ce) are the most common members of the chevkinite...crystallographic documentation. Chevkinite-(Ce) and/or perrierite-(Ce) occur with other Ti-, Zr-, and REE-bearing...hosts of incompatible elements. Chevkinite-(Ce) and perrierite-(Ce) from mafic rocks have distinctive chemical...is chevkinite-(Ce), while the low-Fe group (<8 wt% FeO) is consistent with perrierite-(Ce), and both minerals |  | MacDonald, Ray, Nejbert, Krzysztof, BagiĆski, BogusĆaw, Jurewicz, Edyta (2018) TiâZrâNb-bearing accessory minerals in high-K trachyandesitic rocks from the Western Outer Carpathians, Moravia, Czech Republic. European Journal of Mineralogy, 30 (1) 135-147 doi:10.1127/ejm/2017/0029-2693 | Journal (article/letter/editorial) | | on 22 oxygen basis Ca 1.274 1.058 La 1.216 1.599 Ce 1.244 1.254 Pr 0.089 0.076 Nd 0.194 0.113 Sm 0.000...4.032 0.000 4.032 3.999 0.018 4.017 S cations Ce/Ce* 13.16 1.07 13.22 0.88 13.18 1.07 13.20 0.93...Formulae on the basis of 7 oxygens La 0.057 0.049 Ce 0.213 0.196 Pr 0.015 0.023 Nd 0.068 0.072 Sm 0.010...magnetite (Mag). (b) Euhedral, plate-like chevkinite-(Ce) with well developed zonation in association with...modest, positive Ce anomalies (Ce/Ce* 1.0â1.5), the rest showing negative anomalies (Ce/Ce* 0.86â0.99; Table |  | | Journal (article/letter/editorial) | | Deniz Talan and Qingqing Huang * Department of Mining Engineering, West Virginia University, Morgantown...composition of the synthetic solution. Element Sc Y La Ce Pr Nd Sm Eu Concentration (mg/L) 0.00 3.09...following equations: Adsorption Capacity (qe ) = (Ci â Ce ) Ă V m (2) Amount of ion in the adsorbent V Ă...solution (L), m the weight of zeolite (g) used, and Ce is the ion concentration (mg/L) when absorption equilibrium...The Langmuir isotherm equation is expressed as: 1 Ce Ce = + qe Q0 Ă b Q0 (4) where Q0 is the maximum monolayer |  | | Journal (article/letter/editorial) | | Heisenbergite UO2(OH)2·H2O Menzenschwand uranium deposit, Southern Black Forest, Baden-WuÌrttemberg, Germany...2Pb3(Sb7.8As1.7)S18 SantâOlga tunnel, Monte Arsiccio mine, Stazzema, Apuan Alps, Tuscany, Italy (43Âș58â 10Âș17âE)...Ariskop Quarry, Aris, near Windhoek, Windhoek district, Khomas Region, Namibia Nikita V. Chukanov*, Sergey...7Ti1.6O46(OH)2 Koyubi Ridge, SĂžr Rondane Mountains, East Antarctica (71Âș54.381âS 24Âș13.197âE) Toshiaki Shimura*...Beaverite-(Zn) Pb(Fe2Zn)(SO4)2(OH)6 Mikawa mine, Niigata Prefecture, Japan (37.47ÂșN E 139.27ÂșE) Eriko Sato* |  | | Journal (article/letter/editorial) | | chaĂźnes dâoctaĂšdres (TiO6) comme module fondamental, ce qui confirme la tendance quâont ces octaĂšdres Ă se... et dans lâautre, ils partagent des arĂȘtes. Dans ce travail, nous Ă©valuons la diversitĂ© dâagencements...coins, les chaĂźnes sont ni branchĂ©es ou en boucle; ce sont des chaĂźnes [TiâŸ5] topologiquement simples....Polyakovite-(Ce): REE4 Mg Cr3+2 Ti4+2 Si4 O22 The main building unit of the polyakovite-(Ce) structure...respectively). In a broad sense, polyakovite-(Ce) and perrierite-(Ce), ideally Ce4 Fe2+ SILICATE MINERALS |  | | Book (edition) | | Back cO\·erphoto: Wolframite. 45 mm. Yaogangxian, China, H Page 1: MuscO\ite. 45 mm, Linopolis, Brazil,...Linopolis, Brazil, H Page 13: Gold, 35 mm.Eagle's est Mine, California, G Publi!>hed by Grdllit.u.o. Stefanikova43... Prague Printedin Czech Republicby Finidr.u.o .. Ce,ky Te~in 14/02/03/0 I All rights reservedâąâą ·o pan...dominant rareearth element (REE). e.g. monazite-(Ce), monazite(Nd), etc. In a few cases a similar procedure...(municipio), pref. (prefecture), dept. (departement), dept. (departamento), dist. (district). Less common terms |
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