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1998 (1)
1Author    M. Windhaus, B. D. Mosel, W. Müller-WarmuthRequires cookie*
 Title    Mössbauer Studies of Fe 2+ in Iron Langbeinites and other Crystals with Langbeinite Structure  
 Abstract    57 Fe Mössbauer spectra have been measured at various temperatures between 4.2 K and 300 K for iron langbeinites A 2 Fe 2^04)3 with A = K, NH 4 , Rb, T1 and magnesium, manganese and cadmium lang-beinites doped with Fe" + . The spectra revealed several contributions whose isomer shifts and quadru-pole splittings have been obtained by fitting program routines. For the high-temperature cubic phases two crystallographically non-equivalent iron sites have been identified, characteristic of Fe 2+ in the high-spin state. Abrupt changes of the quadrupole couplings indicated phase transitions; in some cases, the spectra have also revealed several sites for Fe 2+ in low temperature phases. From the temperature de-pendences, phase transition temperatures, crystal field splittings and Debye temperatures have been de-rived. 
  Reference    Z. Naturforsch. 53a, 27—37 (1998); received January 21 1998 
  Published    1998 
  Keywords    57 Fe Mössbauer Spectroscopy, Inorganic Crystals, Structure, Phase Transitions 
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 TEI-XML for    default:Reihe_A/53/ZNA-1998-53a-0027.pdf 
 Identifier    ZNA-1998-53a-0027 
 Volume    53