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Structural characterization of two K2SnX(PO4)3 (X=Fe,Yb) with langbeinite structure

  • Abderrahim Aatiq (a1), Btissame Haggouch (a1), Rachid Bakri (a1), Youssef Lakhdar (a1) and Ismael Saadoune (a2)...


Structures of two K2SnX(PO4)3(X=Fe,Yb) phosphates, obtained by conventional solid state reaction techniques at 950 °C, were determined at room temperature by X-ray powder diffraction using Rietveld analysis. The two materials exhibit the langbeinite-type structure (P213 space group, Z=4). Cubic unit cell parameter values are: a=9.9217(4) Å and a=10.1583(4) Å for K2SnFe(PO4)3 and K2SnYb(PO4)3, respectively. Structural refinements show that the two crystallographically independent octahedral sites (of symmetry 3) have a mixed Sn∕X (X=Fe,Yb) population although ordering is stronger in the Yb phase than in the Fe phase.


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Aatiq, A. (2004). “Synthesis and structural characterization of ASnFe(PO4)3 (A=Na2,Ca,Cd) phosphate with the Nasicon type structure,” Powder Diffr. PODIE2 10.1154/1.1725232 19, 272279.
Aatiq, A. and Dhoum, H. (2004). “Structure of AFeTi(PO4)3 (A=Ca,Cd) Nasicon phases from powder X-ray data,” Powder Diffr. PODIE2 10.1154/1.1604127 19, 157161.
Aatiq, A. and Dhoum, H. (2006). “Structure of AFeTi(PO4)3 (A=Mn,Sr) Nasicon-type phases,” Ann. Chim. Sci. Mat. 31, 3138.
Aatiq, A., Ménétrier, M., Croguennec, L., Suard, E., and Delmas, C. (2002). “On the structure of Li3Ti2(PO4)3,” J. Mater. Chem. JMACEP 10.1039/b203652p 12, 29712978.
Battle, P. D., Cheetham, A. K., Harrison, W. T. A., and Long, G. J. (1986). “The crystal structure and magnetic properties of the synthetic langbeinite KBaFe2(PO4)3,” J. Solid State Chem. JSSCBI 10.1016/0022-4596(86)90211-2 62, 1625.
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 10.1107/S0108768185002063 41, 244247.
Carvajal, J. J., Aznar, A., Solé, R., Gavaldá, Jna., Massons, J., Solans, X., Aguiló, M., and Diaz, F. (2003). “Growth and structural characterization of Rb2Ti1.01Er0.99(PO4)3,” Chem. Mater. CMATEX 15, 204211.
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.
Droß, T. and Glaum, R. (2004). “The langbeinite-type barium vanadium(III) orthophosphate, Ba3V4(PO4)6,” Acta Crystallogr., Sect. E: Struct. Rep. Online ACSEBH 60, i58i60.
Gustafsson, J. C. M., Norberg, S. T., Svensson, G., and Albertsson, J. (2005). “Two new langbeinites, Rb2YbTi(PO4)3 and Rb2Yb0.32Ti1.68(PO4)3, investigated at 293 and 150 K,” Acta Crystallogr., Sect. C: Cryst. Struct. Commun. ACSCEE 61, i9i13.
Hagman, L. and Kierkegaard, P. (1968). “The crystal structure of NaMe2IV(PO4)3; Me=Ge, Ti,Zr,” Acta Chem. Scand. ACHSE7 22, 18221932.
Hong, H. Y-P. (1976). “Crystal structures and crystal chemistry in the system Na(1+x)Zr2SixP(3−x)O12,” Mater. Res. Bull. MRBUAC 10.1016/0025-5408(76)90073-8 11, 173182.
Isasi, J. and Daidouh, A. (2000). “Synthesis, structure and conductivity study of monovalent phosphates with the langbeinite structure,” Solid State Ionics SSIOD3 10.1016/S0167-2738(00)00677-9 133, 303313.
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 10.1006/jssc.1994.1080 109, 116121.
Masse, R., Durif, A., Guitel, J-C., and Tordjman, I. (1972). “Structure cristalline du monophosphate lacunaire KTi2(PO4)3. Monophosphate lacunaires NbGe(PO4)3 et M5+Ti(PO4)3 pour M5+=Sb,Nb,Ta,” Bull. Soc. Fr. Mineral. Cristallogr. BUFCAE 95, 4755.
Norberg, S. T. (2002). “New phosphate langbeinites, K2MTi(PO4)3 (M=Er,Yb or Y), and an alternative description of the langbeinite framework,” Acta Crystallogr., Sect. B: Struct. Sci. ASBSDK 10.1107/S0108768102013782 58, 743749.
Orlova, A. I., Orlova, V. A., Buchirin, A. V., Korchenkin, K. K., Beskrovnyi, A. I., and Demarin, V. T. (2005). “Cesium and its analogs, Rubidium and Potassium, in rhombohedral [NaZr2(PO4)3 type] and cubic (langbeinite type) phosphates: 2. Properties: Behavior on heating, in aqueous solutions, and in salt melts,” Radiokhimiya RADKAU 47, 235240Orlova, A. I., Orlova, V. A., Buchirin, A. V., Korchenkin, K. K., Beskrovnyi, A. I., and Demarin, V. T. (translated from Radiokhimiya 47, 213218).
Orlova, A. I., Trubach, I. G., Kurazhkovskaya, V. S., Pertierra, P., Salvadó, M. A., García-Granda, S., Khainakov, S. A., and García, J. R. (2003). “Synthesis, characterization, and structural study of K2FeZrP3O12 with langbeinite structure,” J. Solid State Chem. JSSCBI 10.1016/S0022-4596(03)00101-4 173, 314318.
Rodriguez-Carvajal, J. (1997). “Fullprof, Program for Rietveld refinement,” Laboratoire Léon Brillouin (CEA-CNRS) Saclay, France.
Shannon, R. D. (1976). “Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides,” Acta Crystallogr., Sect. A: Cryst. Phys., Diffr., Theor. Gen. Crystallogr. ACACBN 10.1107/S0567739476001551 32, 751767.
Shpanchenko, R. V., Lapshina, O. A., Antipov, E. V., Hadermann, J., Kaul, E. E., and Geibbel, C. (2005). “New lead vanadium phosphate with langbeinite-type structure: Pb1.5V2(PO4)3,” Mater. Res. Bull. MRBUAC 40, 15691576.


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Structural characterization of two K2SnX(PO4)3 (X=Fe,Yb) with langbeinite structure

  • Abderrahim Aatiq (a1), Btissame Haggouch (a1), Rachid Bakri (a1), Youssef Lakhdar (a1) and Ismael Saadoune (a2)...


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