Published June 15, 1991 | Version v1
Journal article Metadata-only

Redetermination of the structure of the 80 K superconductor YBa2Cu4O8 by time-of-flight neutron powder diffraction

Creators

  • 1. Science and Technology Center for Superconductivity, Argonne National Lab., IL (USA)
  • 2. Materials Science Div., Argonne National Lab., IL (USA)
  • 3. National Research Inst. for Metals, Meguro, Tokyo (Japan)
  • 4. National Inst. for Research in Inorganic Materials, Tsukuba, Ibaraki (Japan)
  • 5. Government Industrial Research Inst., Kita, Nagoya (Japan)

Description

Mr=745.77, orthorhombic, Ammm, a=3.8402 (1), b=3.8708 (1), c=27.2309 (3) A, V=404.8 A3, Dx=6.119 g cm-3, Z=2, T=295 K, 912 reflections included, Rwp=5.62%, Rexp=3.34%. Rietveld analysis of high-resolution time-of-flight powder neutron diffraction data has been used to redetermine the structure of the 80 K superconductor YBa2Cu4O8 (the '124 phase'). The essential features of the structure previously reported have been confirmed. This study improves upon the precision of the previously reported structural parameters, obtained by powder neutron diffraction. The compound is stoichiometric, with no occupancy of the O(5) inter-chain site. (orig.)

Additional details

Publishing Information

Journal Title
Acta Crystallographica. Section C: Crystal Structure Communications
Journal Volume
47
Journal Issue
6
Series
Acta Crystallogr., Sect. C: Cryst. Struct. Commun.
Journal Page Range
1143-1145
ISSN
0108-2701
CODEN
ACSCE

INIS

Country of Publication
Denmark
Country of Input or Organization
Denmark
INIS RN
23004522
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
BARIUM OXIDES; COPPER OXIDES; CRYSTAL STRUCTURE; HIGH-TC SUPERCONDUCTORS; LATTICE PARAMETERS; NEUTRON DIFFRACTION; YTTRIUM OXIDES
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CHALCOGENIDES; COHERENT SCATTERING; COPPER COMPOUNDS; DIFFRACTION; OXIDES; OXYGEN COMPOUNDS; SCATTERING; SUPERCONDUCTORS; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS