X-RAY STRUCTURE-ANALYSIS OF YBA2CU3O6.7

Authors
RUCK K BORRMANN H SIMON A
Citation
K. Ruck et al., X-RAY STRUCTURE-ANALYSIS OF YBA2CU3O6.7, Solid state communications, 93(11), 1995, pp. 865-868
Citations number
16
Categorie Soggetti
Physics, Condensed Matter
Journal title
Solid state communications → ACNP
ISSN journal
00381098
Volume
93
Issue
11
Year of publication
1995
Pages
865 - 868
Database
ISI
SICI code
0038-1098(1995)93:11<865:XSOY>2.0.ZU;2-7
Abstract
We present a structural model for ordered YBa2Cu3O6.7 on the basis of 545 measured X-ray superstructure reflections of a twinned crystal. Th e model proposed earlier of a tripled unit cell with two CuO3 chains a lternating with one CuO2 chain is verified (Pmmm, a = 11.469(6) Angstr om, b = 3.889(2) Angstrom, c = 11.720(6) Angstrom, Z = 3). Displacemen ts of the strongly scattering atoms Ba and Cu compared to their positi ons in YBa2Cu3O6.93 are refined.