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Hyperfine Interactions

, Volume 35, Issue 1–4, pp 907–911 | Cite as

Mössbauer hyperfine interactions in natural wolframites

  • J. S. Saini
  • A. K. Singh
  • V. K. Garg
  • S. K. Jaireth
  • K. Chandra
Applications to Chemistry and Biology Chemistry

Abstract

Powdered samples of Indian Natural Wolframites, (FexMn1−x) WO4 with x=0.95 to 0.41, obtained from seven different locations of two quartz-wolframite deposits of Degana and Sirohi in Rajasthan, have been investigated by Mössbauer spectroscopy down to 20K and magnetic susceptibility down to 77K. The Mössbauer spectra from 300K to 30K clearly indicate multiple sites which is at variance with the reported work. Below 50K a weak magnetic interaction with Hint∼45Koe is observed. The spectra above transition temperature are resolved in three doublets and explained on the basis of reported crystal structure. The values of isomer shift, quadrupole splitting and magnetic hyperfine field have been attributed to high spin ferrous ions with octahedral symmetry. Relatively small value of Q.S. (∼1.5 mm/sec. at 300K) indicate a strong contribution of the lattice term to the electric field gradient.

Keywords

Magnetic Susceptibility Powdered Sample Field Gradient Multiple Site Isomer Shift 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    L.C. Hsu, Amer. Mineral. 61 (1976) 944.Google Scholar
  2. 2.
    H. Dachs, H. Weitzel and E. Stoll, Solid State Commun, 4 (1966) 473.CrossRefADSGoogle Scholar
  3. 3.
    H. Dachs, E. Stoll and H. Weitzell, Z. Kristallogr. 125 (1967) 120.CrossRefGoogle Scholar
  4. 4.
    D. Ulku, Z. Kristallogr. 124 (1967) 192.CrossRefGoogle Scholar
  5. 5.
    N.V. Belov, N.N. Neronova and T.S. Smirnova, Soviet Phys. Crystallography 2 (1957) 311.MathSciNetGoogle Scholar
  6. 6.
    H. Weitzel, Dissertation, University of Tubingen, Germany (1969).Google Scholar
  7. 7.
    H. Weitzel, Jahrb. Miner. Abh. 113 (1970) 13.Google Scholar
  8. 8.
    H. Weitzel, Z. Kristallogr. 131 (1970) 289.CrossRefGoogle Scholar
  9. 9.
    R.O. Keeling, Jr. Acta Cryst. 10 (1957) 209.CrossRefGoogle Scholar
  10. 10.
    H. Dachs, Solid State Commun. 7 (1969) 1015.CrossRefADSGoogle Scholar
  11. 11.
    Ch. Klein, Solid State Commun. 12 (1973) 773.CrossRefADSGoogle Scholar
  12. 12.
    H.A. Obermayer, H. Dachs, and H. Schrocke, Solid State Commun. 12 (1973) 779.CrossRefADSGoogle Scholar
  13. 13.
    F. Wegner, Solid State Commun. 12 (1973) 785.CrossRefADSGoogle Scholar
  14. 14.
    A. Sasaki, J. Mineral. 2 (1959) 375Google Scholar
  15. 15.
    Ch. Klein and R. Geller, J. Phys. (Paris) C-6 (1974) 589.Google Scholar
  16. 16.
    R. Guillen, J.R. Regnard and J. Amosse, Phys. Chem. Minerals, 8 (1982) 83.CrossRefADSGoogle Scholar
  17. 17.
    R. Caruba, A. Baumer, R. Guillen, J.R. Regnard, Bull. Mineral 105 (1982) 246.Google Scholar
  18. 18.
    J.I. Kunrath, C.S. Muller, and A. Vasquez, Hyperfine Interact. 10 (1981) 1013.CrossRefADSGoogle Scholar
  19. 19.
    V.I. Goldanskii, G.M. Gorodinskii, S.V. Karyagin, L.A. Korytko, L.M. Krizhanskii, E.F. Makarov, I.P. Suzdalev and V.V. Khrapov, Doklady Akad. Nauk S.S.S.R. 147 (1962) 127.Google Scholar
  20. 20.
    T. Ericsson, R. Wappling, J. Phys. (Paris) C6 (1976) 719.Google Scholar

Copyright information

© J.C. Baltzer A.G., Scientific Publishing Company 1987

Authors and Affiliations

  • J. S. Saini
    • 1
  • A. K. Singh
    • 2
  • V. K. Garg
    • 3
  • S. K. Jaireth
    • 4
  • K. Chandra
    • 1
  1. 1.University Science Instrumentation CentreUniversity of RoorkeeRoorkeeIndia
  2. 2.Department of PhysicsInstitute of Paper TechnologySaharanpurIndia
  3. 3.Department of Physics and ChemistryFederal University of Espirito SantoVitóriaBrazil
  4. 4.Department of Earth SciencesUniversity of RoorkeeRoorkeeIndia

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