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EXAFS Study of the CuAsSe Amorphous Alloys
Author(s) -
GómezVela D.,
Esquivias L.,
Prieto C.
Publication year - 1992
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.2221690203
Subject(s) - extended x ray absorption fine structure , coordination number , chalcogenide , coordination sphere , copper , selenium , arsenic , amorphous solid , chalcogen , crystallography , spectroscopy , materials science , coordination complex , chalcogenide glass , alloy , chemistry , analytical chemistry (journal) , metallurgy , absorption spectroscopy , metal , crystal structure , ion , physics , optics , environmental chemistry , organic chemistry , quantum mechanics
Some amorphous alloys of the chalcogenide CuAsSe family are studied by EXAFS spectroscopy. Results are presented, obtained for the two samples Cu 8 As 26 Se 66 and Cu 26 As 37 Se 37 . The mean coordination number of the three different atoms and their distances to the first coordination sphere are determined in both the alloys. It is found that the copper atoms are fourfold and the arsenic ones are threefold coordinated in both the compounds and the coordination numbers for selenium are 3.8 and 2.2 in Cu 8 As 26 Se 66 and Cu 26 As 37 Se 37 , respectively.