| High-pressure phase transition of Bi(2)Fe(4)O(9). | |
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MedLine Citation:
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PMID: 22422362 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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The high-pressure behaviour of Bi(2)Fe(4)O(9) was analysed by in situ powder and single-crystal x-ray diffraction and Raman spectroscopy. Pressures up to 34.3(8) GPa were generated using the diamond anvil cell technique. A reversible phase transition is observed at approximately 6.89(6) GPa and the high-pressure structure is stable up to 26.3(1) GPa. At higher pressures the onset of amorphization is observed. The crystal structures were refined from single-crystal data at ambient pressure and pressures of 4.49(2), 6.46(2), 7.26(2) and 9.4(1) GPa. The high-pressure structure is isotypic to the high-pressure structure of Bi(2)Ga(4)O(9). The lower phase transition pressure of Bi(2)Fe(4)O(9) with respect to that of Bi(2)Ga(4)O(9) (16 GPa) confirms the previously proposed strong influence of cation substitution on the high-pressure stability and the misfit of Ga(3+) and Fe(3+) in tetrahedral coordination at high pressure. A fit of a second-order Birch-Murnaghan equation of state to the p-V data results in K(0) = 74(3) GPa for the low-pressure phase and K(0) = 79(2) GPa for the high-pressure phase. The mode Grüneisen parameters were obtained from Raman-spectroscopic measurements. |
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Authors:
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Alexandra Friedrich; Jasmin Biehler; Wolfgang Morgenroth; Leonore Wiehl; Björn Winkler; Michael Hanfland; Martin Tolkiehn; Manfred Burianek; Manfred Mühlberg |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-3-16 |
Journal Detail:
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Title: Journal of physics. Condensed matter : an Institute of Physics journal Volume: 24 ISSN: 1361-648X ISO Abbreviation: - Publication Date: 2012 Mar |
Date Detail:
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Created Date: 2012-3-16 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101165248 Medline TA: J Phys Condens Matter Country: - |
Other Details:
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Languages: ENG Pagination: 145401 Citation Subset: - |
Affiliation:
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Institut für Geowissenschaften, Abteilung Kristallographie, Goethe-Universität Frankfurt, Altenhöferallee 1, D-60438 Frankfurt am Main, Germany. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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