Hostname: page-component-78c5997874-94fs2 Total loading time: 0 Render date: 2024-11-14T23:48:28.219Z Has data issue: false hasContentIssue false
  • English
  • Français

Crystal structure of Sr2MgWO6 and Ba2SrWO6 determined by powder X-ray diffraction

Published online by Cambridge University Press:  06 March 2012

D. D. Khalyavin ,
A. M. R Senos  and
P. Q. Mantas
D. D. Khalyavin
Affiliation:
Department of Ceramics and Glass Engineering, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal
A. M. R Senos
Affiliation:
Department of Ceramics and Glass Engineering, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal
P. Q. Mantas*
Affiliation:
Department of Ceramics and Glass Engineering, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal
*
a)Author to whom correspondence should be addressed; Electronic mail: pmantas@cv.ua.pt
Get access Rights & Permissions [Opens in a new window]

Abstract

The crystal structures of Sr2MgWO6 and Ba2SrWO6 compounds, studied by powder X-ray diffraction, were found to be distorted perovskites with a complete NaCl type ordering between Mg2+/W6+ and Sr2+/W6+ ions, respectively. The unit cells are characterized by the tetragonal (space group I4/m; a0a0a−) symmetry, with the parameters a=5.5849(10) Å and c=7.9455(10) Å, for Sr2MgWO6 and triclinic (space group F-1; a−b−b−) symmetry, with the parameters a=8.5409(10) Å, b=c=8.5860(10) Å, α=89.35(1)° and β=γ=90.31(1)°, for Ba2SrWO6. © 2004 International Centre for Diffraction Data.

Keywords

powder diffractiondouble perovskitemicrowave materialsSr2MgWO6Ba2SrWO6
Type
New Diffraction Data
Information
Powder Diffraction , Volume 19 , Issue 3 , September 2004 , pp. 280 - 283
Copyright
Copyright © Cambridge University Press 2004

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

Akbas, M. M. A.and Davies, P. K. (1998). “Ordering-induced microstructures and microwave dielectric properties of the Ba(Mg1/3Nb2/3)O3-BaZrO3 system,” J. Am. Ceram. Soc. JACTAW 81, 670–676. jac, JACTAW CrossRefGoogle Scholar
Davies, P. K., Tong, J., and Negas, T. (1997). “Effect of ordering-induced domain boundaries on low-loss Ba(Zn1/3Ta2/3)O3-BaZrO3 perovskite microwave dielectrics,” J. Am. Ceram. Soc. JACTAW 80, 1727–1740. jac, JACTAW CrossRefGoogle Scholar
Desu, S. B.and O’Bryan, H. M. (1985). “Microwave loss quality of BaZn1/3Ta2/3O3 ceramics,” J. Am. Ceram. Soc. JACTAW 68, 546–551. jac, JACTAW CrossRefGoogle Scholar
Fesenko, E. G. (1972). Semeistvo Perovskita i Segnetoelektrichestvo (M.: Atomizdat) (in Russian).Google Scholar
Filipev, V. S.and Fesenko, E. G. (1966). “Symmetry and lattice parameters of some composite perovskites,” Sov. Phys. Crystallogr. SPHCA6 10, 532–540. spc, SPHCA6 Google Scholar
Gateshki, M., Igartua, J. M., and Hernandez-Bocanegra, E. (2003). “X-ray powder diffraction results for the phase transitions in Sr2MWO6 (M=Ni, Zn, Co, Cu) double perovskite oxides,” J. Phys.: Condens. Matter JCOMEL 15, 6199–6217. jcz, JCOMEL Google Scholar
Glazer, A. M. (1975). “Simple way of determining perovskite structures,” Acta Crystallogr., Sect. A: Cryst. Phys., Diffr., Theor. Gen. Crystallogr. ACACBN A31, 756–762. aca, ACACBN CrossRefGoogle Scholar
Howard, C. J., Kennedy, B. J., and Woodward, P. M. (2003). “Ordered double perovskites-a group theoretical analysis,” Acta Crystallogr., Sect. B: Struct. Sci. ASBSDK B59, 463–471. acl, ASBSDK CrossRefGoogle Scholar
Khalyavin, D. D., Han, J. P., Senos, A. M. R., and Mantas, P. Q. (2003). “Synthesis and Dielectric Properties of Tungsten-Based Complex Perovskites,” J. Mater. Res. JMREEE 18, 2600–2607. jmr, JMREEE CrossRefGoogle Scholar
Nomura, S., Toyama, K., and Kaneta, K. (1982). “Ba(Mg1/3Ta2/3)O3 ceramics with temperature-stable high dielectric-constant and low microwave loss,” Jpn. J. Appl. Phys., Part 2 JAPLD8 21, L624–L626. jjc, JAPLD8 CrossRefGoogle Scholar
Reaney, I. M., Colla, E. L., and Setter, N. (1994). “Dielectric and structural characteristics of Ba-based and Sr-based complex perovskites as a function of tolerance factor,” Jpn. J. Appl. Phys., Part 1 JAPNDE 33, 3984–3990. jjb, JAPNDE CrossRefGoogle Scholar
Rodriguez-Carvajal, J. (1993). “Recent advances in magnetic structure determination by neutron powder diffraction,” Physica B PHYBE3 192, 55–69. phb, PHYBE3 CrossRefGoogle Scholar
Takahashi, H., Ayusawa, K., and Sakamoto, N. (1997). “Microwave dielectric properties of Ba(Mg1/2W1/2)O3-BaTiO3 ceramics,” Jpn. J. Appl. Phys., Part 1 JAPNDE 36, 5597–5599. jjb, JAPNDE CrossRefGoogle Scholar
Woodward, P. M. (1997). “Octahedral tilting in perovskites. 1. Geometrical considerations,” Acta Crystallogr., Sect. B: Struct. Sci. ASBSDK B53, 32–43. acl, ASBSDK CrossRefGoogle Scholar
Zurmuhlen, R., Petzelt, J., Kamba, S., Voitsekhtovskii, V. V., Kolla, E., and Setter, N. (1995a). “Dielectric spectroscopy of Ba(B1/2′B1/2″)O3 complex perovskite ceramics: Correlations between ionic parameters and microwave dielectric properties. I. Infrared reflectivity study (1012–1014 Hz),” J. Appl. Phys. JAPIAU 77, 5341–5350. jap, JAPIAU CrossRefGoogle Scholar
Zurmuhlen, R., Petzelt, J., Kamba, S., Kozlov, G., Volkov, A., Gorshunov, B., Dube, D., Tagantsev, A., and Setter, N. (1995b). “Dielectric spectroscopy of Ba(B1/2′B1/2″)O3 complex perovskite ceramics: Correlations between ionic parameters and microwave dielectric properties. II. Studies below the phonon eigenfrequencies (102–1012 Hz),” J. Appl. Phys. JAPIAU 77, 5351–5364. jap, JAPIAU CrossRefGoogle Scholar