Abstract
With the aim of creating novel ceramics for applications in nuclear materials with high radiation tolerance, multiple samples with A-B-O stoichiometries ranging from 215 to 227 were synthesized and characterized by a combination of SEM, XRD, and TEM methods. Single-phase defect-fluorite-type compounds with A = Sm or Yb and B = Ti, Zr, and/or Sn are reported; whereas, pyrochlore structured compounds and lanthanide sesquioxide phases were found as major phases in numerous samples. A series of Y-b-Sn-O samples was successfully prepared as nearly single phase or single phase materials. These are essentially defect fluorites with extra weak peaks, most likely due to X-ray scattering from oxygen or oxygen and metal cations. We describe some interesting TEM data and describe selected area diffraction patterns with complex modulations.
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References:
G.R. Lumpkin, M. Pruneda, S. Rios, K.L. Smith, K. Trachenko, K.R. Whittle, and N.J. Zaluzec (2007), “Nature of the chemical bond and prediction of radiation tolerance in pyrochlore and defect fluorite compounds”, J. Solid State Chem., 180, 1512– 1518.
M.P. van Dijk, K.J. de Vries, and A.J. Burggraaf (1983) “Oxygen ion and mixed conductivity in compounds with the fluorite and pyrochlore structure. Solid State Ionics, 9 & 10, 913–920.
G.C. Lau, B.D. Muegge, T.M. McQueen, E.L. Duncan, and R.J. Cava (2006) Stuffed rare earth pyrochlore solid solutions. J. Solid State Chem. 179, 3126–3135.
M. de los Reyes, K.R. Whittle, Z. Zhang, S.E. Ashbrook, M.R. Mitchell, L.Y. Jang, and G.R. Lumpkin (2013) The pyrochlore to defect fluorite phase transition in Y2Sn2-xZrxO7. RSC Advances 3, 5090–5099.
Z. Zhang, S.C. Middleburgh, M. de los Reyes, G.R. Lumpkin, B.J. Kennedy, P.E.R. Blanchard, E. Reynolds, and L.Y. Jang (2013) Gradual structural evolution from pyrochlore to defect-fluorite in Y2Sn2-xZrxO7: average versus local structure. J. Phys. Chem. C 117, 26740–26749.
Y.F. Shepelev and M.A. Petrova (2008) Crystal structures of Ln2TiO5 (Ln = Gd, Dy) polymorphs. Inorg. Mater. 44, 1354–1361.
R.D. Aughterson, G.R. Lumpkin, M. de los Reyes, N. Sharma, C.D. Ling, B. Gault, K.L. Smith, M Avdeev, and J.M. Cairney (2014) Crystal structures of orthorhombic, hexagonal, and cubic compounds of the Sm(x)Yb(2-x)TiO5 series. J. Solid State Chem. 213, 182–192.
R.D. Aughterson, G.R. Lumpkin, G.J. Thorogood, Z. Zhang, B. Gault, and J.M. Cairney (2015) Crystal chemistry of the orthorhombic Ln2TiO5 compounds with Ln = La, Pr, Nd, Sm, Gd, Tb and Dy. J. Solid State Chem. 227, 60–67.
C.L. Tracy, M. Lang, Z. Zhang, F. Zhang, Z. Wang, and R.C. Ewing (2012) Structural response of A2TiO5 (A = La, Nd, Sm, Gd) to swift heavy ion irradiation. Acta Materialia 60, 4477–4486.
R.D. Aughterson, G.R. Lumpkin, M. Ionescu, M. de los Reyes, B. Gault, K.R. Whittle, K.L. Smith, and J.M. Cairney (2015) Ion-irradiation resistance of the orthorhombic Ln2TiO5 (Ln = La, Pr, Nd, Sm, Eu, Gd, Tb and Dy) series. J. Nucl. Mater. 467, 683– 691.
R.D. Aughterson, G.R. Lumpkin, M. de los Reyes, B. Gault, P. Baldo, E. Ryan, K.R. Whittle, K.L. Smith, and J.M. Cairney (2016) Ion-irradiation resistance of the orthorhombic Ln2TiO5 (Ln = La, Pr, Nd, Sm, Eu, Gd, Tb and Dy) series. J. Nucl. Mater. 471, 17–24.
R.D. Aughterson, G.R. Lumpkin, K.L. Smith, Z. Zhang, N. Sharma, and J.M. Cairney (2018) Crystal structures of orthorhombic, hexagonal, and cubic compounds of the Sm(x)Yb(2-x)TiO5 series. Ceram. Int. 4, 511–519.
L.P. Lyashenko and L.G. Shcherbakova (2012) X-ray diffraction data for fluorite-like Gd2ZrO5 and Gd2HfO5. Inorganic Materials 48, 54–56.
C. Heremans and B.J. Wuensch (1995) Fast ion conducting Y2(ZryTi1-y)2O7 pyrochlores: neutron Rietveld analysis of disorder induced by Zr substitution. J. Solid State Chem., 117, 108–121.
R.D. Shannon (1976) Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides. Acta Crystallographica A 32, 751–767.
L. Kong, Y. Zhang, I. Karatchevtseva, G.R. Lumpkin, and G. Triani (2014) Synthesis and characterization of Nd2SnxZr2-xO7 pyrochlore ceramics. Ceramics International 40, 651–657.
L. Kong, Z. Zhang, M. de los Reyes, I. Karatchevtseva, G.R. Lumpkin, G. Triani, and R.D. Aughterson (2015) Soft chemical synthesis and structural characterisation of Y2HfxTi2-xO7. Ceramics International 41, 5309–5317.
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Newman, R., Aughterson, R.D. & Lumpkin, G.R. Synthesis and Structure of Novel A2BO5 Compounds Containing A = Y, Yb, Gd, Sm, and La and B = Zr, Ti, and Sn. MRS Advances 3, 1117–1122 (2018). https://doi.org/10.1557/adv.2018.210
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DOI: https://doi.org/10.1557/adv.2018.210