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Synthesis and structural characterization of ASnFe(PO4)3 (A=Na2,Ca,Cd) phosphates with the Nasicon type structure

  • Abderrahim Aatiq (a1)


The crystal structures of ASnFe(PO4)3 (A=Na2, Ca, Cd) phases, obtained by conventional solid state reaction techniques at (950–1000 °C), were determined at room temperature from X-ray powder diffraction (XRD) using Rietveld analysis. The three materials exhibit the Nasicon-type structure (R3c space group, Z=6) with a random distribution of Sn(Fe) within the framework. Hexagonal cell parameters when A=Na2, Ca and Cd are: a=8.628(1) Å, c=22.151(2) Å; a=8.569(1) Å, c=22.037(2) Å and a=8.587(1) Å, c=21.653(2) Å, respectively. Structural refinements show a partial occupancy of M1 (Na(1)) and M2 (Na(2)) sites in Na2SnFe(PO4)3 leading to the cationic distribution [Na1.221.78]M2[Na0.780.22]M1SnFe(PO4)3. Ca2+ ions are distributed only in the M1 site of [□3]M2[Ca]M1SnFe(PO4)3. From XRD data, it is difficult to unambiguously distinguish between Cd2+ and Sn4+ ions in CdSnFe(PO4)3. Nevertheless the overall set of cation–anion distances within the Nasicon framework clearly shows that the cationic distribution can be illustrated by the [□3]M2[Cd]M1SnFe(PO4)3 crystallographic formula. Distortion within the [Sn(Fe)(PO4)3] frameworks, in ASnFe(PO4)3 (A=Na2,Ca,Cd) phases, is shown to be related to the M1 site size. © 2004 International Centre for Diffraction Data.


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Aatiq, A., Delmas, C., El Jazouli, A., and Gravereau, P. (1998). “Structure and electrochemical study of Li2xMn(1−x)TiCr(PO4)3 (x=0–0.5) with Nasicon-like structure,” Ann. Chim. Sci. Mat., ZZZZZZ 23, 121124.
Aatiq, A. and Dhoum, H. (2003). “Structure of AFeTi(PO4)3 (A=Ca,Cd) Nasicon phases from powder X-ray data,” Powder Diffr., (in press).
Aatiq, A., Ménétrier, M., Croguennec, L., Suard, E., and Delmas, C. (2002a). “On the structure of Li3Ti2(PO4)3,J. Mater. Chem. JMACEP 12, 29712978. jtc, JMACEP
Aatiq, A., Ménétrier, M., El Jazouli, A., and Delmas, C. (2002b). “Structural and lithium intercalation studies of Mn(0.5−x)CaxTi2(PO4)3 phases (0≤x≤0.50),Solid State Ionics SSIOD3 150, 391405. ssi, SSIOD3
Brown, I. D.and Altermatt, D. (1985). “Bond-valence parameters obtained from a systematic analysis of the inorganic crystal structure database,” Acta Crystallogr., Sect. B: Struct. Sci. ASBSDK 41, 244247. acl, ASBSDK
Delmas, C., Nadiri, A., and Soubeyroux, J. L. (1988). “The Nasicon-type titanium phosphates ATi2(PO4)3 (A=Li,Na) as electrode materials,” Solid State Ionics SSIOD3 28–30, 419423. ssi, SSIOD3
Delmas, C., Viala, J. C., Olazcuaga, R., Le Flem, G., Hagenmuller, P., Cherkaoui, F., and Brochu, R. (1981). “Ionic conductivity in Nasicon-type phases Na1+xZr2−xLx(PO4)3 (L=Cr,In,Yb),Solid State Ionics SSIOD3 3/4, 209214. ssi, SSIOD3
Hagman, L.and Kierkegaard, P. (1968). “The crystal structure of NaMe2IV(PO4)3; Me=Ge, Ti, Zr,” Acta Chem. Scand. ACSAA4 22, 18221932. 9em, ACSAA40001-5393
Hong, H. Y-P. (1976). “Crystal structures and crystal chemistry in the system Na(1+x)Zr2SixP(3−x)O12,Mater. Res. Bull. MRBUAC 11, 173182. mrb, MRBUAC
Isasi, J.and Daidouh, A. (2000). “Synthesis, structure and conductivity study of monovalent phosphates with the langbeinite structure,” Solid State Ionics SSIOD3 133, 303313. ssi, SSIOD3
Kasthuri Rangan, K.and Gopalakrishnan, J. (1994). “New titanium-vanadium phosphates of Nasicon and Langbeinite structures, and differences between the two structures toward deintercalation of alkali metal,” J. Solid State Chem. JSSCBI 109, 116121. jss, JSSCBI
Krimi, S., Mansouri, I., El Jazouli, A., Chaminade, J. P., Gravereau, P., and Le Flem, G. (1993). “The structure of Na5Ti(PO4)3,J. Solid State Chem. JSSCBI 105, 561566. jss, JSSCBI
Masquelier, C., Wurn, C., Rodriguez-Carvajal, J., Gaubicher, J., and Nazar, L. F. (2000). “A powder neutron diffraction investigation of the two rhombohedral Nasicon analogues: γ-Na3Fe2(PO4)3 and Li3Fe2(PO4)3,Chem. Mater. CMATEX 12, 525532. cma, CMATEX
Morin, E., Angenault, J., Couturier, J. C., Quarton, M., He, H., and Klinowski, J. (1997). “Phase transition and crystal structures of LiSn2(PO4)3,Eur. J. Inorg. Chem. EJICFO 34, 947958. 8qi, EJICFO
Padhi, A. K., Nanjundaswamy, K. S., Masquelier, C., and Goodenough, J.B. (1997). “Mapping of transition metal redox energies in phosphates with NASICON structure by lithium intercalation,” J. Electrochem. Soc. JESOAN 144, 25812586. jes, JESOAN
Rodriguez-Carvajal, J. (1997). “Fullprof, Program for Rietveld refinement,” Laboratoire Léon Brillouin (CEA-CNRS) Saclay, France.
Shannon, R. D. (1976). “Revised effective ionic and systematic studies of interatomic distances in halides and chalcogenides,” Acta Crystal- logr., Sect. A: Cryst. Phys., Diffr., Theor. Gen. Crystallogr. ACACBN A32, 751767. aca, ACACBN
Woodcock, D. A., Lightfoot, P., and Smith, R. I. (1999). “Powder neutron studies of three low thermal expansion in the NZP family: K0.5Nb0.5Ti1.5(PO4)3, BaTi2(PO4)3 and Ca0.25Sr0.25Zr2(PO4)3,J. Mater. Chem. JMACEP 9, 26312636. jtc, JMACEP
Yin, S. C., Grondey, H., Strobel, P., Anne, M., and Nazar, L. F. (2003). “Electrochemical property: Structure relationships in monoclinic Li3−yV2(PO4)3,J. Am. Chem. Soc. JACSAT 125, 1040210411. acs, JACSAT

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Synthesis and structural characterization of ASnFe(PO4)3 (A=Na2,Ca,Cd) phosphates with the Nasicon type structure

  • Abderrahim Aatiq (a1)


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