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Title: The most incompressible metal osmium at static pressures above 750 gigapascals

Authors:
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  1. (DESY)
  2. (
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
FOREIGN
OSTI Identifier:
1221998
Resource Type:
Journal Article
Resource Relation:
Journal Name: Nature; Journal Volume: 525; Journal Issue: 09, 2015
Country of Publication:
United States
Language:
ENGLISH

Citation Formats

Dubrovinsky, L., Dubrovinskaia, N., Bykova, E., Bykov, M., Prakapenka, V., Prescher, C., Glazyrin, K., Liermann, H.-P., Hanfland, M., Ekholm, M., Feng, Q., Pourovskii, L.V., Katsnelson, M.I., Wills, J.M., Abrikosov, I.A., Radboud), Bayreuth), NUST-Russia), UC), Link), LANL), and ESRF). The most incompressible metal osmium at static pressures above 750 gigapascals. United States: N. p., 2016. Web. doi:10.1038/nature14681.
Dubrovinsky, L., Dubrovinskaia, N., Bykova, E., Bykov, M., Prakapenka, V., Prescher, C., Glazyrin, K., Liermann, H.-P., Hanfland, M., Ekholm, M., Feng, Q., Pourovskii, L.V., Katsnelson, M.I., Wills, J.M., Abrikosov, I.A., Radboud), Bayreuth), NUST-Russia), UC), Link), LANL), & ESRF). The most incompressible metal osmium at static pressures above 750 gigapascals. United States. doi:10.1038/nature14681.
Dubrovinsky, L., Dubrovinskaia, N., Bykova, E., Bykov, M., Prakapenka, V., Prescher, C., Glazyrin, K., Liermann, H.-P., Hanfland, M., Ekholm, M., Feng, Q., Pourovskii, L.V., Katsnelson, M.I., Wills, J.M., Abrikosov, I.A., Radboud), Bayreuth), NUST-Russia), UC), Link), LANL), and ESRF). 2016. "The most incompressible metal osmium at static pressures above 750 gigapascals". United States. doi:10.1038/nature14681.
@article{osti_1221998,
title = {The most incompressible metal osmium at static pressures above 750 gigapascals},
author = {Dubrovinsky, L. and Dubrovinskaia, N. and Bykova, E. and Bykov, M. and Prakapenka, V. and Prescher, C. and Glazyrin, K. and Liermann, H.-P. and Hanfland, M. and Ekholm, M. and Feng, Q. and Pourovskii, L.V. and Katsnelson, M.I. and Wills, J.M. and Abrikosov, I.A. and Radboud) and Bayreuth) and NUST-Russia) and UC) and Link) and LANL) and ESRF)},
abstractNote = {},
doi = {10.1038/nature14681},
journal = {Nature},
number = 09, 2015,
volume = 525,
place = {United States},
year = 2016,
month = 6
}
  • Osmium is one of the most incompressible elemental metals, and is used as a matrix material for synthesis of ultrahard materials. To examine the behavior of osmium metal under extreme conditions of high pressure and temperature, we measured the thermal equation of state of osmium metal at pressures up to 50 GPa and temperatures up to 3000 K. X-ray diffraction measurements were conducted in the laser heated diamond anvil cell at GeoSoilEnviroCARS and the High Pressure at the Advanced Photon Source and beamline 12.2.2 at the advanced light source. Ambient temperature data give a zero pressure bulk modulus of 421more » (3) GPa with a first pressure derivative fixed at 4. Fitting to a high temperature Birch-Murnaghan equation of state gives a room pressure thermal expansion of 1.51(0.06) x 10{sup -5} K{sup -1} with a first temperature derivative of 4.9(0.7) x 10{sup -9} K{sup -2} and the first temperature derivative of bulk modulus of be dK{sub 0}/dT = -0.055 (0.004). Fitting to a Mie-Grueneisen-Debye equation of state gives a Grueneisen parameter of 2.32 (0.08) with a q of 7.2 (1.4). A comparison of the high pressure, temperature behavior among Re, Pt, Os, shows that Os has the highest bulk modulus and lowest thermal expansion of the three, suggesting that Os-based ultrahard materials may be especially mechanically stable under extreme conditions.« less
  • No abstract prepared.
  • Oxidation reactions of L-ascorbic acid by three hexacyanometalate(III) ions in aqueous acidic media are studied at elevated pressures. Kinetic parameters characterizing two parallel paths involving ascorbic acid (H[sub 2]Asc) and ascorbate ion (HAsc[sup [minus]]) were reported. The reaction mechanism was discussed on the basis of the volume profiles of the redox reactions between ascorbic acid and hexacyanometalate ions.
  • The vapor pressures of the pentafluorides, ReF/sub 5/, MoF/sub 5/, OsF/ sub 5/, the oxytetrafluorides, ReOF/sub 4/, MoOF/sub 4/, WOF/sub 4/, and the oxyfiuorides ReOF/sub 5/ and ReO/sub 2/F/sub 3/ were measured by a static method using a diaphragm gauge of high sensitivity. The physica- 1 constants, heats of sublimation and vaporization, and entropies of vaporization were derived from the vaporpressure data. The oxypentafiuoride, ReOF/sub 5/ was studied in detail and a hitherto unknown solid-solid transition at 30.0 deg is reported. The thermal disproportionation of the pentafluorides is described. (auth)
  • The spectra, quantum yield, and lifetime of excited Ru(II) and Os(II) tris(bipyridine) and tris(phenanthroline) complexes have been studied in acetonitrile as a function of pressure (0.1-300 MPa) and temperature (2-70/sup 0/C). The radiative and nonradiative transition rates between the luminescent CT level and the ground states are generally increased by 5-10% at pressures of 300 MPa. A pressure effect of greater magnitude and opposite direction is observed for the luminescence lifetime tau of Ru(II) complexes, because a third CT ..-->.. LF nonradiative decay channel is thermally accessible and made inaccessible by pressure. The measurement of activation volumes for tau atmore » different temperatures gives ..delta..V = 11.5 mL/mol for the CT ..-->.. LF deactivation path of Ru(bpy)/sub 3/Cl/sub 2/ in CH/sub 3/CN. 34 references, 5 figures, 8 tables.« less