Electric field gradient (EFG) measurements for Fe z + in the cisand trans-sites of a large single crystal of trioctahedral biotite of the 1M polytype are described. Attempts to apply thickness and polarisation corrections are outlined. The measured EFG's are distinctly rhombic: t1=0.28 and 0.42 resp
Mössbauer study of iron-rich biotites
✍ Scribed by L. Häggström; R. Wäppling; H. Annersten
- Book ID
- 107731305
- Publisher
- Elsevier Science
- Year
- 1969
- Tongue
- English
- Weight
- 173 KB
- Volume
- 4
- Category
- Article
- ISSN
- 0009-2614
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📜 SIMILAR VOLUMES
## Abstract Studies are made of Mössbauer absorption of Fe^57^ in biotite. The asymmetric double peak spectrum is explained by quadrupole splitting; the energy levels are influenced by the presence of OH‐groups in the octahedral surrounding of the Fe‐ions.
The broadening of the 14.41 keV Mossbauer line of "Fe due to diffusion of iron atoms in polycrystalline beryllium has been investigated in the temperature range 1123 to 1423K. The observed broadenings obey the Arrhenius law with activation energy 1.66( 10) eV, i.e.. lower than that obtained from th