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


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.


Magnetic Susceptibility Powdered Sample Field Gradient Multiple Site Isomer Shift 
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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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