Static high pressure studies on Nd and Sc

Conference · Mon Jun 24 00:00:00 EDT 1985

OSTI ID:6718423

Akella, J; Xu, J; Smith, G S

We have investigated the crystal structural transformations in neodymium and scandium up to 4.0 GPa pressure and at room temperature, in a diamond-anvil high pressure apparatus. Nd has a double hexagonal-close packed (dhcp) structure at ambient pressure and temperature. Then it transforms to a face-centered cubic (fcc) structure at 3.8 GPa, which further transforms to a triple hexagonal-close packed structure (thcp) at about 18.0 GPa. In scandium we observed only one transformation from the hexagonal-close packed (hcp) structure at room temperature to a tetragonal structure. This transformation occurs between 19.0 and 23.2 GPa pressure.

• Research Organization: Lawrence Livermore National Lab., CA (USA); Carnegie Institution of Washington, DC (USA). Geophysical Lab.
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6718423
• Report Number(s): UCRL-92885; CONF-850759-18; ON: DE87006691
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTAL-PHASE TRANSFORMATIONS
CUBIC LATTICES
ELEMENTS
FCC LATTICES
HCP LATTICES
HEXAGONAL LATTICES
METALS
NEODYMIUM
PHASE TRANSFORMATIONS
PRESSURE EFFECTS
RARE EARTHS
SCANDIUM
TETRAGONAL LATTICES
TRANSITION ELEMENTS
VERY HIGH PRESSURE