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Mössbauer Spectra of (NH 4 ) 2 Sb x Sn 1− x Cl 6 Crystals
Author(s) -
Yu. Aleksandrov A.,
Ionova G. V.,
Ionov S. P.,
Baltrunas D. A.,
Makarov E. F.
Publication year - 1974
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220620136
Subject(s) - valence (chemistry) , ion , crystallography , spectral line , mössbauer spectroscopy , crystal structure , materials science , crystal (programming language) , chemistry , physics , organic chemistry , astronomy , computer science , programming language
Mössbauer spectra of mixed (NH 4 ) 2 Sb x Sn 1− x Cl 6 crystals with x = 0.02, 0.06, 0.08, 0.19, 0.24, and 0.28 were investigated in the temperature range 77 to 150 K. On the basis of the obtained data a packing model of the mixed crystals is proposed. A transition is found in the crystal with x = 0.28: below a critical temperature region Sb 3+ and Sb 5+ ions are ordered and above they have the average valence of Sb 4+ . This transition is interpreted on the basis of the co‐operative interaction of electron pairs.