High-pressure X-ray diffraction on neptunium compounds: Recent results for NpAs
Abstract
High-pressure X-ray diffraction studies have been performed at room temperature on neptunium monoarsenide up to 53 GPa. This compound undergoes a phase transformation which starts around 25 GPa and is completed at 40 GPa. The high-pressure phase was indexed in the CsCl structure type. On pressure decrease, hysteresis to transform is observed down to 16 GPa. The bulk modulus B0 = 70 GPa and its pressure derivative B‧ 0 = 6.2 have been calculated for the low-pressure phase by fitting the V( P) data to the Birch and Murnaghan equations.
- Publication:
-
Physica B+C
- Pub Date:
- December 1986
- DOI:
- 10.1016/0378-4363(86)90296-2
- Bibcode:
- 1986PhyBC.144...79D