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X‐ray spectroscopic study of some cobalt chalcogenides
Author(s) -
Kondawar V. K.,
Mande C.
Publication year - 1976
Publication title -
x‐ray spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.447
H-Index - 45
eISSN - 1097-4539
pISSN - 0049-8246
DOI - 10.1002/xrs.1300050103
Subject(s) - discontinuity (linguistics) , cobalt , ionic bonding , bent molecular geometry , metal , chemical bond , crystal structure , atom (system on chip) , formal charge , materials science , chemistry , crystallography , molecular physics , atomic physics , chemical physics , physics , inorganic chemistry , ion , mathematical analysis , mathematics , organic chemistry , computer science , embedded system , metallurgy , composite material
The position, shape and the extended fine structure of the cobalt K absorption discontinuity have been studied in the pure metal and in its four chalcogenides, CoO, CoS, CoSe and CoTe, using a forty centimetre diameter bent crystal X‐ray spectrograph. It has been found that the discontinuity shifts towards the high energy side in the chalcogenides and that the chemical shift Δ E depends upon the effective ionic charge on the absorbing atom. The fine structure within the main discontinuity is discussed on the basis of band structure and molecular orbital diagram, while the extended fine structure is interpreted on Lytle's theory. The results obtained throw light on the chemical bonding prevalent in these compounds.