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Fluorine-, yttrium- and lanthanide-rich cerianite-(Ce) from carbonatitic rocks of the Kerimasi volcano and surrounding explosion craters, Gregory Rift, northern Tanzania

Published online by Cambridge University Press:  05 July 2018

A. N. Zaitsev ,
A. R. Chakhmouradian ,
O. I. Siidra ,
J. Spratt ,
C. T. Williams ,
C. J. Stanley ,
S. V. Petrov ,
S. N. Britvin  and
E. A. Polyakova
A. N. Zaitsev*
Affiliation:
Department of Mineralogy, Faculty of Geology, St Petersburg State University, University Emb., 7/9, St Petersburg 199034, Russia Department of Mineralogy, Natural History Museum, Cromwell Road, London SW7 5BD, UK
A. R. Chakhmouradian
Affiliation:
Department of Geological Sciences, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
O. I. Siidra
Affiliation:
Department of Crystallography, Faculty of Geology, St Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg 199034, Russia
J. Spratt
Affiliation:
Department of Mineralogy, Natural History Museum, Cromwell Road, London SW7 5BD, UK
C. T. Williams
Affiliation:
Department of Mineralogy, Natural History Museum, Cromwell Road, London SW7 5BD, UK
C. J. Stanley
Affiliation:
Department of Mineralogy, Natural History Museum, Cromwell Road, London SW7 5BD, UK
S. V. Petrov
Affiliation:
Department of Mineral Deposits, Faculty of Geology, St Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg 199034, Russia
S. N. Britvin
Affiliation:
Department of Crystallography, Faculty of Geology, St Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg 199034, Russia
E. A. Polyakova
Affiliation:
Department of Mineralogy, Faculty of Geology, St Petersburg State University, University Emb., 7/9, St Petersburg 199034, Russia
*
*E-mail: burbankite@gmail.com
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Abstract

Cerianite-(Ce), ideally CeO2, occurs as rounded grains up to 5 μm across in a block of highly altered calcite carbonatite lava from the Kerimasi volcano, and as euhedral crystals up to 200 μm across in carbonatite-derived eluvial deposits in the Kisete and Loluni explosion craters in the Gregory Rift, northern Tanzania. X-ray powder diffraction data (a = 5.434(5) Å) and Raman spectroscopy (minor vibration modes at 184 and 571 cm—1 in addition to a strong signal at 449 cm—1) suggest the presence of essential amounts of large cations and oxygen vacancies in the Kisete material. Microprobe analyses reveal that the mineral contains both light and heavy trivalent rare earth elements (REE) (7.9-15.5 wt.% LREE2O3 and 4.9-9.7 wt.% HREE2O3), and that it is enriched in yttrium (7.1 — 14.5 wt.% Y2O3) and fluorine (2.2—3.5 wt.%). Single-crystal structure refinement of the mineral confirms a fluorite-type structure with a cation—anion distance of 2.3471(6) Å. The cerianite-(Ce) is considered to be a late-stage secondary mineral in the carbonatitic rocks.

Keywords

cerianite-(Ce)ceriaoxyfluoridecarbonatiteRaman spectroscopychemical compositionX-ray diffractioncrystal structureKerimasiKiseteLoluniTanzania
Type
Research Article
Information
Mineralogical Magazine , Volume 75 , Issue 6 , December 2011 , pp. 2813 - 2822
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2011

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References

Akagi, T. and Masuda, A. (1998) A simple thermodynamic interpretation of Ce anomaly. Geochemical Journal, 32, 301-314.CrossRefGoogle Scholar
Anderson, H.T. and Wuensch, B.J. (1973) CeO2–Y2O3 solid solutions. Journal of the American Ceramic Society, 56, 285-286.CrossRefGoogle Scholar
Anchary, S.N., Ambekar, B.R., Mathews, M.D., Tyagi, A.K. and Moorthy, P.N. (1998) Study of phase transition and volume thermal expansion in a rareearth (RE) oxyfluoride system by high-temperature XRD (RE=La, Nd, Sm, Eu and Gd). Thermochimica Acta, 320, 239-243.CrossRefGoogle Scholar
Baenziger, N.C., Holden, J.R., Knudson, G.E. and Popov, A.I. (1954) Unit cell dimensions of some rare earth oxyfluorides. Journal of the American Chemical Society, 76, 4734-4735.CrossRefGoogle Scholar
Brauer, G. and Gradinger, H. (1954) ü ber heterotype Mischphasen bei Seltenerdoxyden. II. Die Oxydsysteme des Cers und des Praseodyms. Zeitschrift für Anorganische und Allgemeine Chemie, 277, 89-95.CrossRefGoogle Scholar
Braun, J.-J., Pagel, M., Muller, J.-P., Bilong, P., Michard, A. and Guillet, B. (1990) Cerium anomalies in lateritic profiles. Geochimica et Cosmochimica Acta, 54, 781-795.CrossRefGoogle Scholar
Dawson, J.B. (2008) The Gregory rift valley and Neogene-recent volcanoes of northern Tanzania. Memoir of the Geological Society of London, 33. The Geological Society, London, 102 pp.Google Scholar
Donahoe, R.J., Liou, J.G. and Guldman, S. (1984) Synthesis and characterization of zeolites in the system Na2O–K2O–A12O3–SiO2–H2O. Clays and Clay Minerals, 32, 433-443.CrossRefGoogle Scholar
Donahoe, R.J., Liou, J.G., and Hemingway, B.S. (1990) Thermochemical data for merlinoite: 2. Free energies of formation at 298.15 K of six synthetic samples having various Si/Al and Na/(Na + K) ratios and application to saline, alkaline lakes. American Mineralogist, 75, 201-208.Google Scholar
Fergus, J.W. (1997) Crystal structure of lanthanum oxyfluoride. Journal of Materials Science Letters, 16, 267-269.CrossRefGoogle Scholar
Frondel, C. and Marvin, U.B. (1959) Cerianite, CeO2, from Peços de Caldas, Brazil. American Mineralogist, 44, 882-884.Google Scholar
Goldschmidt, V.M. and Thomassen, L. (1923) Die Krystallstruktur natürlicher und synthetischer Oxyde von Uran, Thorium und Cerium. Videnskapsseiskapets Skrifter. I. Matematisk-Naturvidenskapelig Klasse, No. 2. Kristiania: Jacob Dybwad, Oslo, 48 pp.Google Scholar
Graham, A.R. (1955) Cerianite CeO2: a new rare-earth oxide mineral. American Mineralogist, 40, 560-564.Google Scholar
Guastoni, A., Nestola, F. and Giaretta, A. (2009) Mineral chemistry and alteration of rare earth element (REE) carbonates from alkaline pegmatites of Mount Malosa, Malawi. American Mineralogist, 94, 1216-1222.CrossRefGoogle Scholar
Harwood, M.G. (1949) Variation in density and colour of cerium oxide. Nature, 164, 787.CrossRefGoogle Scholar
Hay, R.L. (1983) Natrocarbonatite tephra of Kerimasi volcano, Tanzania. Geology, 11, 599-602.2.0.CO;2>CrossRefGoogle Scholar
Hö lsä, J., Säilynoja, E., Rahiala, H. and Valkonen, J. (1997) Characterization of the non-stoichiometry in lanthanum oxyfluoride by FT-IR absorption, Raman scattering, X-ray powder diffraction and thermal analysis. Polyhedron, 16, 3421-3427.CrossRefGoogle Scholar
Holtstam, D. and Anersson, U.B. (2007) The REE minerals of the Bastnäs-type deposits, south-central Sweden. The Canadian Mineralogist, 45, 1073-1114.CrossRefGoogle Scholar
Holtstam, D., Grins, J. and Nysten, P. (2004) Håleniusite-(La) from the Bastnä s deposit, Västmanland, Sweden: a new REE oxyfluoride mineral species. The Canadian Mineralogist, 42, 1097-1103.CrossRefGoogle Scholar
Juneja, J.M., Tyagi, A.K., Chattopadhyay, G. and Seetharaman, S. (1995) Sub-solidus phase equilibria in the NdF3-Nd2O3 system. Materials Research Bulletin, 30, 1153-1160.CrossRefGoogle Scholar
Levin, I., Huang, Q.Z., Cook, L.P. and Wong-Ng, W. (2005) Nonquenchable chemical order-disorder phase transition in yttrium oxyfluoride. European Journal of Inorganic Chemistry, 2005, 87-91.CrossRefGoogle Scholar
Lottermoser, B.G. (1987) Churchite from the Mt Weld carbonatite laterite, Western Australia. Mineralogical Magazine, 51, 468-469.CrossRefGoogle Scholar
Luo, M.F., Yan, Z.-L. and Jin, L.-Y. (2006) Structure and redox properties of CexPr1–xO2–δ mixed oxides and their catalytic activities for CO, CH3OH and CH4 combustion. Journal of Molecular Catalysis A: Chemical, 260, 157-162.CrossRefGoogle Scholar
Matsumoto, Y. and Sakamoto, A. (1982) Preliminary report on metamict cerianite from Nesöya, Lützow-Holmbukta, East Antarctica. Memoirs of National Institute of Polar Research, 21, 103-111.Google Scholar
Mattsson, H.B. and Tripoli, B.A. (2011) Depositional characteristics and volcanic landforms in the Lake Natron–Engaruka monogenetic field, northern Tanzania. Journal of Volcanology and Geothermal Research, 203, 23-34.CrossRefGoogle Scholar
Mazali, I.O., Viana, B.C., Alves, O.L., Mendes Filho, J. and Souza Filho, A.G. (2007) Structural and vibrational properties of CeO2 nanocrystals. Journal of Physics and Chemistry of Solids, 68, 622-627.CrossRefGoogle Scholar
McBride, J.R., Hass, K.C., Poindexter, B.D. and Weber, W.H. (1994) Raman and x-ray studies of Ce1–xRExO2–y, where RE=La, Pr, Nd, Eu, Gd, and Tb. Journal of Applied Physics, 76, 2435-2441.CrossRefGoogle Scholar
McCullough, J. D. (1950) An X-ray study of the rare- earth oxide systems: CeIV–NdIII, CeIV–PrIII, CeIV–PrIV and PrIV–NdIII . Journal of the American Chemical Society, 72, 1386-1386.CrossRefGoogle Scholar
Otake, T., Yugami, H., Yashiro, K., Nigara, Y., Kawada, T. and Mizusaki, J. (2003) Nonstoichiometry of Ce1–XYXO2–0.5X–δ (X=0.1, 0.2). Solid State Ionics, 161, 181-186.CrossRefGoogle Scholar
Pan, Y. and Stauffer, M.R. (2000) Cerium anomaly and Th/U fractionation in the 1.85 Ga Flin Flon Paleosol: clues from REE- and U-rich accessory minerals and implications for paleoatmospheric reconstruction. American Mineralogist, 85, 898-911.CrossRefGoogle Scholar
Sheldrick, G.M. (2008) A short history of SHELX. Acta Crystallographica, A64, 122-.Google Scholar
Skublov, S.G., Astaf’ev, B.Yu., Marin, Yu.B., Gembitskaya, I.M. and Levchenkov, O.A. (2009) First find of cerianite in zircons from metasomatites of the Terskii Greenstone Belt, Baltic Shield. Doklady Earth Sciences, 428, 1134-1138.CrossRefGoogle Scholar
Stormer, J.C. Jr., Pierson, M.L. and Tacker, R.C. (1993) Variation of F and Cl X-ray intensity due to anisotropic diffusion in apatite during electron microprobe analysis. American Mineralogist, 78, 641-648.Google Scholar
Styles, M.T. and Young, B.R. (1983) Fluocerite and its alteration products from the Afu Hills, Nigeria. Mineralogical Magazine, 47, 41-46.CrossRefGoogle Scholar
Taoudi, A., Laval, J.P. and Frit, B. (1994) Synthesis and crystal structure of three new rare earth oxyfluorides related to baddeleyite (LnOF; Ln=Tm, Yb, Lu). Materials Research Bulletin, 29, 1137-1147.CrossRefGoogle Scholar
Van Wambeke, L. (1977) The Karonge rare earth deposits, Republic of Burundi: new mineralogical geochemical data and origin of the mineralization. MineraliumDeposita, 12, 373-380.Google Scholar
Wang, D.Y., Park, D.S., Griffith, J. and Nowick, A.S. (1981) Oxygen-ion conductivity and defect interactions in yttria-doped ceria. Solid State Ionics, 2, 95-105.CrossRefGoogle Scholar
Whitfield, H.J., Roman, D. and Palmer, A.R. (1970) X-ray study of the system ThO2–CeO2–Ce2O3 . Journal of Inorganic and Nuclear Chemistry, 28, 2817-2825.CrossRefGoogle Scholar
Zachariasen, W.H. (1951) Crystal chemical studies of the 5f-series of elements. XIV. Oxyfluorides, XOF. Acta Crystallographica, 4, 231-236.CrossRefGoogle Scholar
Zaitsev, A.N. (2010) Nyerereite from calcite carbonatite at the Kerimasi volcano, northern Tanzania. Geology of Ore Deposits, 52, 630-640.CrossRefGoogle Scholar
Zaitsev, A.N., Williams, C.T., Britvin, S.N., Kuznetsova, I.V., Spratt, J., Petrov, S.V. and Keller, J. (2010) Kerimasite, Ca3Zr2(Fe3+ 2Si)O12, a new garnet from carbonatites of Kerimasi volcano and surrounding explosion craters, northern Tanzania. Mineralogical Magazine, 74, 803-820.CrossRefGoogle Scholar
Zintl, E. and Croatto, U. (1939) Fluoritgitter mit leeren Anionenplätzen. Zeitschrift für Anorganische und Allgemeine Chemie, 242, 79-86.CrossRefGoogle Scholar