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Accession number;02A0335431
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| Title;High Pressure Structure of Anthracnene. |
| Author;
NAKAYAMA ATSUKO
(Sangyogijutsusogoken Shintansokeizairyokaihatsukense)
OEHZELT M
(Technische Univ. Graz)
RESEL R
(Technische Univ. Graz)
FUJIHISA HIROSHI
(Sangyogijutsusogoken)
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Journal Title;Program and Abstracts of Papers. High Pressure Conference of Japan
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Journal Code:L1222A
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ISSN:0917-6373
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VOL.42nd;NO.;PAGE.11(2001)
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| Figure&Table&Reference;FIG.1, REF.5 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;The crystal of anthracene (C14H10) at atmospheric pressure and room temperature has monoclinic P21/a structure. The existence of second order phase transition at 2.4 GPa caused by shear stress was confirmed by the high-pressure infrared and x-ray studies under the non-hydrostatic condition. The crystal structure at the pressure above 2.4 GPa had been unknown. We investigated the pressure changes in crystal and molecular structures of C14H10 by powder x-ray diffraction measurements under the best hydrostatic condition using helium pressure-transmitting medium. The sample color turns to yellow at 2 GPa, orange at 4 GPa, red at 7 GPa and black at 10 GPa while it is transparent at atmospheric pressure and room temperature. This pressure-induced color change is reversible at the pressure below 14 GPa. The phase transition was first observed at around 12 GPa and room temperature. (author abst.) |
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