Published March 20, 1995 | Version v1
Journal article Metadata-only

Observation of inverted-molecular compression in boron carbide

Creators

  • 1. Department of Physics and Astronomy, The University of Edinburgh, Edinburgh, EH9 3JZ (United Kingdom)
  • 2. Departement des Hautes Pressions, Universite Pierre et Marie Curie, Jussieu, Paris Cedex 05 (France)
  • 3. Physique des Milieux Condenses, Centre National de la Recherche Scientifique URA 782, Universite Pierre et Marie Curie, 4 place Jussieu, 75252 Paris Cedex 05 (France)
  • 4. Sandia National Laboratories, Albuquerque, New Mexico 87185-0345 (United States)
  • 5. ISIS Facility, Rutherford Appleton Laboratory, Chilton, Oxon OX11 0QX (United Kingdom)

Description

High-pressure neutron diffraction studies of boron carbide, B4C, to 11 GPa show that the icosahedral structural units are 23(4)% more compressible than the structure between them. This inverted-molecular compression is in accordance with qualitative predictions based on models of the bonding, but had not previously been observed directly. The results show the effect of the structural compression on the electrical resistivity to be more complex than present, semiquantitative models suggest

Additional details

Publishing Information

Journal Title
Physical Review Letters
Journal Volume
74
Journal Issue
12
Journal Page Range
p. 2268-2271.
ISSN
0031-9007
CODEN
PRLTAO

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
26046627
Subject category
S36: MATERIALS SCIENCE; S36: MATERIALS SCIENCE; S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Descriptors DEI
BORON CARBIDES; CHEMICAL BONDS; COMPRESSIBILITY; COMPRESSION; ELECTRIC CONDUCTIVITY; HIGH PRESSURE; NEUTRON DIFFRACTION; PRESSURE DEPENDENCE
Descriptors DEC
BORON COMPOUNDS; CARBIDES; CARBON COMPOUNDS; COHERENT SCATTERING; DIFFRACTION; ELECTRICAL PROPERTIES; MECHANICAL PROPERTIES; PHYSICAL PROPERTIES; SCATTERING