Structural phase transition of TmGa2 at high pressure
Identifieur interne : 001415 ( Pascal/Checkpoint ); précédent : 001414; suivant : 001416Structural phase transition of TmGa2 at high pressure
Auteurs : U. Schwarz [Allemagne] ; S. Brauninger [Allemagne] ; Y. Grin [Allemagne] ; K. Syassen [Allemagne]Source :
- Journal of alloys and compounds [ 0925-8388 ] ; 1996.
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Abstract
Copyright (c) 1997 Elsevier Science S.A. All rights reserved. We have investigated the structural properties of the intermetallic compound TmGa2 under hydrostatic pressures up to 45GPa by means of X-ray powder diffraction in diamond anvil cells. The orthorhombic low-pressure modification of the KHg2 (CeCu2) type undergoes a structural phase transition at 21(3)GPa into a high-pressure modification of the AlB2 structure type. TB-LMTO-ASA calculations and use of the electron localization function confirm that the structural change from a three-dimensional gallium network to a layered structure is associated with a transition from a tetrahedral homonuclear gallium network to a trigonal planar one.
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Grin</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569</s1><s2>Stuttgart</s2><s3>DEU</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Allemagne</country><placeName><region type="land" nuts="1">Bade-Wurtemberg</region><region type="district" nuts="2">District de Stuttgart</region><settlement type="city">Stuttgart</settlement></placeName></affiliation></author><author><name sortKey="Syassen, K" sort="Syassen, K" uniqKey="Syassen K" first="K." last="Syassen">K. Syassen</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569</s1><s2>Stuttgart</s2><s3>DEU</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Allemagne</country><placeName><region type="land" nuts="1">Bade-Wurtemberg</region><region type="district" nuts="2">District de Stuttgart</region><settlement type="city">Stuttgart</settlement></placeName></affiliation></author></analytic><series><title level="j" type="main">Journal of alloys and compounds</title><title level="j" type="abbreviated">J. alloys compd.</title><idno type="ISSN">0925-8388</idno><imprint><date when="1996">1996</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Journal of alloys and compounds</title><title level="j" type="abbreviated">J. alloys compd.</title><idno type="ISSN">0925-8388</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Binary alloys</term><term>Crystal structure</term><term>Experimental study</term><term>Gallium alloys</term><term>Intermetallic compounds</term><term>Phase transitions</term><term>Pressure effects</term><term>Thulium base alloys</term><term>XRD</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Transition phase</term><term>Alliage base thulium</term><term>Gallium alliage</term><term>Alliage binaire</term><term>XRD</term><term>Structure cristalline</term><term>Composé intermétallique</term><term>Effet pression</term><term>Etude expérimentale</term><term>Alliage Tm55Ga45</term><term>Ga Tm</term><term>6150K</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Copyright (c) 1997 Elsevier Science S.A. All rights reserved. We have investigated the structural properties of the intermetallic compound TmGa<sub>2</sub> under hydrostatic pressures up to 45GPa by means of X-ray powder diffraction in diamond anvil cells. The orthorhombic low-pressure modification of the KHg<sub>2</sub> (CeCu<sub>2</sub>) type undergoes a structural phase transition at 21(3)GPa into a high-pressure modification of the AlB<sub>2</sub> structure type. TB-LMTO-ASA calculations and use of the electron localization function confirm that the structural change from a three-dimensional gallium network to a layered structure is associated with a transition from a tetrahedral homonuclear gallium network to a trigonal planar one.</div></front></TEI><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0925-8388</s0></fA01><fA03 i2="1"><s0>J. alloys compd.</s0></fA03><fA05><s2>245</s2></fA05><fA06><s2>1-2</s2></fA06><fA08 i1="01" i2="1" l="ENG"><s1>Structural phase transition of TmGa<sub>2</sub> at high pressure</s1></fA08><fA11 i1="01" i2="1"><s1>SCHWARZ (U.)</s1></fA11><fA11 i1="02" i2="1"><s1>BRAUNINGER (S.)</s1></fA11><fA11 i1="03" i2="1"><s1>GRIN (Y.)</s1></fA11><fA11 i1="04" i2="1"><s1>SYASSEN (K.)</s1></fA11><fA14 i1="01"><s1>Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569</s1><s2>Stuttgart</s2><s3>DEU</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></fA14><fA20><s1>23-29</s1></fA20><fA21><s1>1996</s1></fA21><fA23 i1="01"><s0>ENG</s0></fA23><fA24 i1="01"><s0>eng</s0></fA24><fA43 i1="01"><s1>INIST</s1><s2>1151</s2><s5>354000061148710030</s5></fA43><fA44><s0>9000</s0><s1>© 1997 Elsevier Science B.V. All rights reserved.</s1></fA44><fA47 i1="01" i2="1"><s0>97-0284434</s0></fA47><fA60><s1>P</s1></fA60><fA61><s0>A</s0></fA61><fA64 i1="01" i2="1"><s0>Journal of alloys and compounds</s0></fA64><fA66 i1="01"><s0>CHE</s0></fA66><fC01 i1="01" l="ENG"><s0>Copyright (c) 1997 Elsevier Science S.A. All rights reserved. We have investigated the structural properties of the intermetallic compound TmGa<sub>2</sub> under hydrostatic pressures up to 45GPa by means of X-ray powder diffraction in diamond anvil cells. The orthorhombic low-pressure modification of the KHg<sub>2</sub> (CeCu<sub>2</sub>) type undergoes a structural phase transition at 21(3)GPa into a high-pressure modification of the AlB<sub>2</sub> structure type. 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Schwarz</name></region><name sortKey="Brauninger, S" sort="Brauninger, S" uniqKey="Brauninger S" first="S." last="Brauninger">S. Brauninger</name><name sortKey="Grin, Y" sort="Grin, Y" uniqKey="Grin Y" first="Y." last="Grin">Y. Grin</name><name sortKey="Syassen, K" sort="Syassen, K" uniqKey="Syassen K" first="K." last="Syassen">K. Syassen</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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