Hostname: page-component-586b7cd67f-t7fkt Total loading time: 0 Render date: 2024-11-28T01:53:15.469Z Has data issue: false hasContentIssue false
  • English
  • Français

Synthesis and characterization of mixed fluorides with PbF2 and ScF3

Published online by Cambridge University Press:  01 March 2012

S. N. Achary  and
A. K. Tyagi
S. N. Achary
Affiliation:
Applied Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400 085, India
A. K. Tyagi*
Affiliation:
Applied Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400 085, India
*
a)Electronic mail: [email protected]; Fax: 0091-22-25505151 0091-22-25519613.
Get access Rights & Permissions [Opens in a new window]

Abstract

A series of mixed fluoride compositions with PbF2 and ScF3 were prepared by heating the intimate mixtures of component fluorides at 600 °C for 10 h followed by slowly cooling to room temperature. The products obtained were analyzed by powder XRD to reveal the phases present in them and hence the low-temperature phase equilibria in the PbF2-ScF3 system. The phase equilibria show the fluorite-type solid solution up to the composition of about 15 mol% of ScF3 in the PbF2 lattice. The unit cell volume decreases with increasing ScF3 contents in the fluorite-type solid solutions. Beyond the solubility limit, the biphasic mixture of the cubic fluorite-type solid solution and leftover ScF3 is found to exist.

Keywords

fluoridespowder xrdphase equilibria
Type
New Diffraction Data
Information
Powder Diffraction , Volume 20 , Issue 3 , September 2005 , pp. 254 - 258
Copyright
Copyright © Cambridge University Press 2005

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Achary, S. N. (2003). “Preparation, characterization and applications of rare-earth based mixed fluorides,” Doctoral dissertation, University of Mumbai.Google Scholar
Achary, S. N., Patwe, S. J., and Tyagi, A. K. (1999). “Synthesis and characterization of mixed fluorides Y1−xCa2+1.5xF7(−1.33⩽x⩽1.0),” Mater. Res. Bull.MRBUAC10.1016/S0025-5408(99)00218-4 34, 2093–2100.CrossRefGoogle Scholar
Babel, D. and Tressaud, A. (1985). “Crystal chemistry of fluorides,” Chap 3, in Solid Inorganic Fluorides edited by Hagenmüller, P. (Academic, New York).Google Scholar
Domesle, R. and Hoppe, R. (1993). “New fluororhodate (III) compounds Pb2RhF 7 and Sr 2RhF 7,” Z. Anorg. Allg. Chem.ZAACAB10.1002/zaac.19835010612 501, 102–110.CrossRefGoogle Scholar
Fedorov, P. P., Trnovcova, V., Meleshina, V. A., Chugunov, V. D., and Sobolev, B. P. (1994). “Eutectic alloys in PbF2-RF3 systems (R=Ho, Yb and Sc),” Inorg. Mater.INOMAF 30, 384–388.Google Scholar
Hagenmüller, P. (1985). Solid Inorganic Fluorides: Chemistry and Physics (Academic, New York).Google Scholar
Kenedy, J. H., Miles, R., and Hunter, J. (1973). “Solid electrolytic properties and crystal forms of lead fluorides,” J. Electrochem. Soc.JESOAN 120, 1441–1446.CrossRefGoogle Scholar
Loesch, R., Hebecker, C., and Ranft, Z. (1982). “Roentgenographische untersuchungen an neuen ternaeren fluoriden vom Typ Tl(III)MF6 (M=Ga, In, Sc) sowie an einkristallen von ScF3,” Z. Anorg. Allg. Chem.ZAACAB10.1002/zaac.19824910124 491, 191–202.Google Scholar
Nowacki, W. (1939). “The crystal structure of ScF3,” Z. Kristallogr.ZEKRDZ 101, 273–282.CrossRefGoogle Scholar
Omari, M. El., Senegas, J., and Reau, J. M. (1997). “Short-range order and F− ion diffusion inside Pb1−xAlxF2+x: NMR investigation and proposal of clustering processes,” Solid State IonicsSSIOD3 100, 241–246.CrossRefGoogle Scholar
Patwe, S. J., Achary, S. N., and Tyagi, A. K. (2001a). “Synthesis and characterization of Y1−xPb2+1.5xF7(−1.33⩽x⩽1.0),” Mater. Res. Soc. Symp. Proc.MRSPDH 36, 597–605.Google Scholar
Patwe, S. J., Balaya, P., Goyal, P. S., and Tyagi, A. K. (2001b). “Ionic conductivity in solid solution of PbF2 and YF 3,” Mater. Res. Soc. Symp. Proc.MRSPDH 36, 1743–1749.Google Scholar
Reau, J. M., Fedorov, P. P., Rabardel, L., Matar, S. F., and Hagenmüller, P. (1983).“Phase equilibria and ionic conductivity in PbF2-YF 3 system,” Mater. Res. Soc. Symp. Proc.MRSPDH 18, 1235–1246.Google Scholar
Trnovcova, V., Fedorov, P. P., Buchinskaya, I. I., Smatko, V., and Hanic, F. (1999). “Fast ion conductivity of PbF2:MF3 (M=Mg, Ba and Cd) and PbF2:ScF3 single crystal and composite,” Solid State IonicsSSIOD3 119, 181–189.CrossRefGoogle Scholar
Tyagi, A. K., Patwe, S. J., Achary, S. N., and Mallia, M. B. (2004). “Phase relation studies in Pb1−xMxF2+x systems (0.0⩽x⩽1.0; M=Nd3+, Eu3+, and Er3+),” J. Solid State Chem.JSSCBI10.1016/j.jssc.2003.12.036 177, 1746–1757.CrossRefGoogle Scholar