High-Pressure Phase in Americium Metal

X-ray diffraction studies at high pressure (above 150 kilobars) show that americium metal undergoes a phase change from a high-symmetry, face-centered cubic structure to an orthorhombic $\alpha $-uranium structure. This transition results from the onset of f-electron bonding as the lattice is compre...

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Veröffentlicht in:	Science (American Association for the Advancement of Science) 1980-03, Vol.207 (4437), p.1353-1355
Hauptverfasser:	Roof, R. B., Haire, R. G., Schiferl, D., Schwalbe, L. A., Kmetko, E. A., Smith, J. L.
Format:	Artikel
Sprache:	eng
Schlagworte:	360102 - Metals & Alloys- Structure & Phase Studies ACTINIDE ALLOYS ALLOYS Aluminum Americium AMERICIUM ALLOYS AMERICIUM BASE ALLOYS Atoms Charge density CRYSTAL STRUCTURE CRYSTAL-PHASE TRANSFORMATIONS Diffraction patterns Electrical phases Electrons Face centered cubic lattices Gaskets HIGH TEMPERATURE IMPURITIES LATTICE PARAMETERS MATERIALS SCIENCE PHASE TRANSFORMATIONS RARE EARTH ADDITIONS RARE EARTH ALLOYS Wave diffraction YTTERBIUM ADDITIONS YTTERBIUM ALLOYS
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Beschreibung
Zusammenfassung:	X-ray diffraction studies at high pressure (above 150 kilobars) show that americium metal undergoes a phase change from a high-symmetry, face-centered cubic structure to an orthorhombic $\alpha $-uranium structure. This transition results from the onset of f-electron bonding as the lattice is compressed.
ISSN:	0036-8075 1095-9203
DOI:	10.1126/science.207.4437.1353