Neutron- and x-ray-diffraction measurements of the bulk modulus of boron
Abstract
The bulk modulus of β-boron has been measured up to 10 GPa by neutron powder diffraction using an opposed-anvil pressure cell. The bulk modulus of α-boron has also been measured to 5 GPa by single-crystal x-ray techniques. The values have been determined to be 185(7) GPa for β-boron and 224(15) GPa for α-boron. These values are markedly smaller than those measured for other hard materials, but total-energy calculations for α-boron are in reasonable agreement.
- Publication:
-
Physical Review B
- Pub Date:
- April 1993
- DOI:
- 10.1103/PhysRevB.47.7668
- Bibcode:
- 1993PhRvB..47.7668N
- Keywords:
-
- 61.12.Gz;
- 62.50.+p;
- 64.30.+t;
- High-pressure and shock wave effects in solids and liquids;
- Equations of state of specific substances