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Crystal structure of a synthetic aluminoan tantalian titanite: a reconnaissance study

Published online by Cambridge University Press:  05 July 2018

R. P. Liferovich  and
R. H. Mitchell
R. P. Liferovich
Affiliation:
Department of Geology, Lakehead University, 955 Oliver Road, Thunder Bay, Ontario, Canada P7B 5E1
R. H. Mitchell*
Affiliation:
Department of Geology, Lakehead University, 955 Oliver Road, Thunder Bay, Ontario, Canada P7B 5E1
*
*E-mail: [email protected]
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Abstract

A synthetic analogue, Ca(Ti0.6Al0.2Ta0.16Nb0.04)OSiO4, of an aluminoan tantalian titanite previously described from Craveggia pegmatite (Piemonte, Italy) has been prepared by a ceramic synthesis technique and its crystal structure determined by Rietveld analysis of the powder X-ray diffraction pattern. The synthetic Al-Ta-Nb-rich titanite adopts space group A2/a implying that substitutions at the single octahedral site destroy the coherence of the off-centering of octahedral chains in the titanite structure resulting in a P 21/a → A2/a phase transition. Unit-cell dimensions obtained for the Al-Ta-Nb-rich titanite are: a = 7.0649(1) Å; b = 8.7187(1) Å; c = 6.5701(1) Å; β = 113.755(1)°, V = 370.41(1) Å3. The extensive replacement of Ti by Al, Ta and Nb results in a considerable decrease in the distortion of all coordination polyhedra in the structure of this titanite. These structural data suggest that a solid solution CaTi1-x(Alx /2 [Ta,Nb]x /2)OSiO4 (0 ≤ x ≤ 0.4) adopting the titanite structure might exist.

Keywords

titaniteRietveld analysiscrystal structuredistortiontantalumniobiumaluminium
Type
Research Article
Information
Mineralogical Magazine , Volume 70 , Issue 1 , February 2006 , pp. 115 - 121
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2006

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Footnotes

†

Permanent address: Geological Institute KSC RAS, 14 Fersmana St., Apatity, 184200 Russia

References

Angel, R.J., Kunz, M., Miletich, R., Woodland, A.B., Koch, M. and Xirochakis, D. (1999) High-pressure phase transitions in CaTiOSiO4 titanite. Phase Transitions, 68, 533–543.CrossRefGoogle Scholar
Balić-Žunić, T. and Vicković, I. (1996) IVTON - a program for the calculation of geometrical aspects of crystal structures and some crystal chemical applications. Journal of Applied Crystallography, 29, 305–306.CrossRefGoogle Scholar
Černý, P. and Riva di Sanseverino, L. (1972) Comments on crystal chemistry of titanite. Neues Jahrbuch fur Mineralogie Monatshefte , 97–103.Google Scholar
Černý, B.J., Chapman, R. and Hinthorne, J.R. (1981) Niobian titanite from the Huron claim pegmatite, southeastern Manitoba. The Canadian Mineralogist, 19,549–552.Google Scholar
Černý, P., Novak, M. and Chapman, R. (1995) The Al(Nb,Ta)Ti_2 substitution in titanite: the emergence of a new species? Mineralogy and Petrology, 52, 61–73.CrossRefGoogle Scholar
Chakhmouradian, A.R. (2004) Crystal chemistry and paragenesis of compositionally-unique (A1-, Fe-, Nb-, and Zr-rich) titanite from Africanda, Russia. American Mineralogist, 89, 1752–1762.CrossRefGoogle Scholar
Chakhmouradian, A.R. and Zaitsev, A.N. (2002) Calcite-amphibole-clinopyroxene rock from Afrikanda Complex, Kola peninsula, Russia: mineralogy and possible link to carbonatites. in. Silicate minerals. The Canadian Mineralogist, 40, 1347–1374.CrossRefGoogle Scholar
Chakhmouradian, A.R., Reguir, E.P. and Mitchell, R.H. (2003) Titanite in carbonatitic rocks: Genetic dualism and geochemical significance. Periodico di Mineralogia, 72 Eurocarb Special Issue, 107–113.Google Scholar
Chrosch, J., Bismayer, U. and Salje, E.K.H. (1997) Antiphase boundaries and phase transitions in titanite: An X-ray diffraction study. American Mineralogist, 82, 677–681.CrossRefGoogle Scholar
Clark, A.M. (1974) A tantalum-rich variety of sphene. Mineralogical Magazine, 39, 605–607.CrossRefGoogle Scholar
Delia Ventura, G., Bellatreccia, F. and Williams, C.T. (1999) Zr- and LREE -rich titanite from Tre Croci, Vico Volcanic complex (Latinum, Italy). Mineralogical Magazine, 63, 123–130.Google Scholar
Dowty, E. (1999) Atoms 5.0. By Shape Software, Kingsport, TN 37663, USA, http://shapesoftware.com/ Google Scholar
Ghose, S., Yoshiaki, I. and Hatch, D.M. (1991) Paraelectric-antiferroelectric phase transition in titanite, CaTiSiO5. I. A high-temperature X-ray diffraction study of the order parameter and transition mechanism. Physics and Chemistry of Minerals, 17, 591–603.Google Scholar
Higgins, J.B. and Ribbe, P.H. (1976) The crystal chemistry and space groups of natural and synthetic titanites. American Mineralogist, 61, 878–888.Google Scholar
Hughes, J.M., Bloodaxe, E.S., Hanchar, J.M. and Foord, E.E. (1997) Incorporation of rare earth elements in titanite: Stabilization of the A2/a dimorph by creation of antiphase boundaries. American Mineralogist, 82, 512–516.CrossRefGoogle Scholar
Kek, S., Aroyo, M., Bismayer, U., Schmidt, C., Eichhorn, K. and Krane, H.G. (1997) The two-step phase transition of titanite, CaTiSiO5: a synchrotron radiation study. Zeitschrift für Kristallographie, 212, 9–19.Google Scholar
Kern, A.A. and Coelho, A.A. (1998) TOPAS . Allied Publishers Ltd. http://www.bruker-axs.com. Google Scholar
Kunz, M. and Brown, I.D. (1995) Out-of-center distortions around octahedrally coordinated d°-tran-sition metals. Journal of Solid State Chemistry, 115, 395–406.CrossRefGoogle Scholar
Kunz, M., Xirouchakis, D., Lindsley, D.H. and Hausermann, D. (1996) High-pressure phase transition in titanite (CaTiOSiO4). American Mineralogist, 81, 1527–1530.CrossRefGoogle Scholar
Kunz, M., Arlt, T. and Stolz, J. (2000) In situ powder diffraction study of titanite (CaTiOSiO4) at high pressure and high temperature. American Mineralogist, 85, 1465–1473.CrossRefGoogle Scholar
Makovicky, E. and Balić-Žunić, T. (1998) New measure of distortion for coordination polyhedra. Acta Crystallographica, B54, 766–773.CrossRefGoogle Scholar
Malcherek, T. (2001) Spontaneous strain in synthetic titanite, CaTiOSiO4 . Mineralogical Magazine, 65, 709–715.CrossRefGoogle Scholar
Robinson, K., Gibbs, G.V. and Ribbe, P.H. (1971) Quadratic elongation: a quantitative measure of distortion in coordination polyhedra. Science, 172, 567–570.CrossRefGoogle Scholar
Sahama, Th.G. (1946) On the chemistry of mineral titanite. Bulletin Committee Géologia Finlandie, 24, 138 88–120.Google Scholar
Salje, E., Schmidt, C. and Bismayer, U. (1993) Structural phase transitions in titanite, CaTiSiO5: a Raman spectroscopic study. Physics and Chemistry of Minerals, 19, 502–506.CrossRefGoogle Scholar
Sawka, W.N., Campbell, R.B. and Norrish, K. (1984) Light-rare-earth-element zoning in sphene and allanite during granitoid fractionation. Geology, 12, 131–134.2.0.CO;2>CrossRefGoogle Scholar
Shannon, R.D. (1976) Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides. Acta Crystallographica , A32, 751–767.CrossRefGoogle Scholar
Speer, J.A. and Gibbs, G.V. (1976) The crystal structure of synthetic titanite, CaTiOSiO4, and the domain textures of natural titanites. American Mineralogist, 61, 238–247.Google Scholar
Taylor, M. and Brown, G.E. (1976) High-temperature structural study of the P2\la -” Alia phase transition in synthetic titanite, CaTiSiO5 . American Mineralogist, 61, 435–437.Google Scholar
Tiepolo, M., Oberri, R. and Vanucci, R. (2002)Trace-element incorporation in titanite: constraints from experimentally determined solid/liquid partition coefficients. Chemical Geology, 191, 105–119.CrossRefGoogle Scholar
Troitzsch, U. and Ellis, D.J. (2002) Thermodynamic properties and stability of AlF-bearing titanite CaTiOSiO4-CaAlFSiO4 . Contributions to Mineralogy and Petrology, 142, 543–563.CrossRefGoogle Scholar
Troitzsch, U., Ellis, D.J., Thompson, J. and FitzGerald, J.D. (1999) Crystal structural changes in titanite along the join TiO-AlF. European Journal of Mineralogy, 6, 955–965.CrossRefGoogle Scholar
van Heurk, C., van Tendeloo, G., Ghose, S. and Amelinckx, S. (1991) Paraelectric-antiferroelectric phase transition in titanite, CaTiSiO5. II. Electron diffraction and electron microscopic studies of the transition dynamics. Physics and Chemistry of Minerals, 17, 604–610.CrossRefGoogle Scholar
Woolley, A.R., Platt, R.G. and Eby, N. (1992) Niobian titanite from the Ilomba nepheline syenite complex, north Malawi. Mineralogical Magazine, 56, 428–430.CrossRefGoogle Scholar