Journal Article

PUBDB-2017-03149

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png High-pressure structural studies of UC by x-ray diffraction and synchrotron radiation

Staun Olsen, J. ; Gerward, L. ; Benedict, U. ; Itié, J.-P. ; Richter, K.

1986
Elsevier Amsterdam [u.a.]

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Please use a persistent id in citations: doi:10.1016/0022-5088(86)90561-8

Abstract: High-pressure v-ray diffraction studies have been performed on UC powder for pressures up to 46 GPa using a diamond anvil cell and synchrotron radiation. The low-pressure phase is of NaCl type with the lattice constant a0 = 4.9606(5) Å at ambient pressure. The best values of the bulk modulus and its pressure gradient are B0= 160(4) GPa and B'0 = 3.6(5) respectively. A transformation to a new phase, UC II, has been found at about 27 GPa. The diffraction lines from the high-pressure phase can be indeved using a pseudo-body-centred orthorhombic unit cell, which is a distortion of the body-centred tetragonal unit cell of the f.c.c. lattice. The lattice constants at 33.6 GPa are a = 3.043(10) Å, b = 3.518(6) Å and c = 4.730(7) Å. The evperimental evuation of state has been compared with the results of theoretical calculations.

Note: Hasylab

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Contributing Institute(s):

1. DESY Retrocat (DESY(-2012))

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

Experiment(s):

1. No specific instrument

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Database coverage:
SCOPUS

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