EVIDENCE FOR CRYSTALLOGRAPHIC NONEQUIVALENCE OF THE 2-2-1-2 AND 2-2-2-3 (4-PYRAMIDAL CONFIGURATIONS IN THE SYSTEM FE-57-BI(PB)-SR-CA-CU-O BY MOSSBAUER-SPECTROSCOPY(1))

Authors
DIAMANDESCU L TARINA D ALDICA G
Citation
L. Diamandescu et al., EVIDENCE FOR CRYSTALLOGRAPHIC NONEQUIVALENCE OF THE 2-2-1-2 AND 2-2-2-3 (4-PYRAMIDAL CONFIGURATIONS IN THE SYSTEM FE-57-BI(PB)-SR-CA-CU-O BY MOSSBAUER-SPECTROSCOPY(1)), Materials letters, 25(3-4), 1995, pp. 87-90
Citations number
12
Categorie Soggetti
Material Science","Physics, Applied
Journal title
Materials letters → ACNP
ISSN journal
0167577X
Volume
25
Issue
3-4
Year of publication
1995
Pages
87 - 90
Database
ISI
SICI code
0167-577X(1995)25:3-4<87:EFCNOT>2.0.ZU;2-N
Abstract
Evidence for crystallographic nonequivalence of the copper site of the (4 + 1) pyramidal oxygen configurations in the 2-2-1-2 and 2-2-2-3 ph ases has been shown by Mossbauer spectroscopy in the system Fe-57(0.05 ):Bi21-xPbxSr1.5Ca2.5Cu3.6Oy with x = 0.2-0.5. The distortion of these (4 + 1) configurations, as reflected by the isomer shift and quadrupo le splitting of the Mossbauer spectra, is discussed in dependence on t he Pb/(Pb + Bi) ratio.