| Phases of vanadium under pressure investigated from first principles. | |
| | |
MedLine Citation:
|
PMID: 21694379 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
|
The existence and stability under pressure of three phases of vanadium are calculated from first principles. The phases are one body-centered cubic (bcc) and two rhombohedral phases (rh(u) and rh(l)), which have greater and lower α values than the primitive bcc rhombohedral cell. The bcc phase is shown in two ways to become unstable at 0.65 Mbar, in agreement with an observed phase transition, but in disagreement with previous higher estimates. The rh phases exist when the bcc phase is unstable, but the bcc phase stabilizes again at 3 Mbar, and the rh phases disappear. At 1.15 Mbar the rh(u) phase becomes and remains unstable and the rh(l) phase becomes the ground state up to 3 Mbar, where the rh(l) phase disappears and the bcc phase takes over. The theory gives four phase transitions among the phases over the pressure range from 0 to 3 Mbar; two of them are bcc to rh(u)-a low pressure (0.3 Mbar) thermodynamic transition found from Gibbs free energies being equal (not observed) and a higher pressure (0.65 Mbar) instability transition when the bcc phase becomes unstable (observed). |
| | |
Authors:
|
S L Qiu; P M Marcus |
Related Documents
:
|
8403659 - A new concept in fracture immobilization. the application of a pressurized brace. 19805589 - Biomechanical consequences of a tear of the posterior root of the medial meniscus. surg... 15990669 - Center of gravity and radiographic posture analysis: a preliminary review of adult volu... 18085439 - A novel pressure film approach for determining the force imparted by clear removable th... 8946179 - Plantar foot pressures during treadmill walking with high-heel and low-heel shoes. 9246089 - Effects of static fingertip loading on carpal tunnel pressure. 1972219 - A method for measuring pressure sores. 20197269 - Orthostatic heart rate and blood pressure in adolescents: reference ranges. 2677089 - Left subclavian flap aortoplasty for coarctation of the aorta: effects on forearm vascu... |
Publication Detail:
|
Type: Journal Article Date: 2008-06-04 |
Journal Detail:
|
Title: Journal of physics. Condensed matter : an Institute of Physics journal Volume: 20 ISSN: 0953-8984 ISO Abbreviation: J Phys Condens Matter Publication Date: 2008 Jul |
Date Detail:
|
Created Date: 2011-06-22 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 101165248 Medline TA: J Phys Condens Matter Country: England |
Other Details:
|
Languages: eng Pagination: 275218 Citation Subset: - |
Affiliation:
|
Department of Physics, Florida Atlantic University, Boca Raton, FL 33431-0991, USA. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: High pressure study of Pu(0.92)Am(0.08) binary alloy.
Next Document: Entanglement of distant flux qubits mediated by non-classical electromagnetic field.