Vibrational Spectroscopy and X-ray Diffraction of Cd(OH)2 to 28GPa at 300 K [electronic resource]
Advanced Light Source Als.
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Online Access (via OSTI) |
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| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Washington, D.C. : Oak Ridge, Tenn. :
United States. Department of Energy. ; distributed by the Office of Scientific and Technical Information, U.S. Department of Energy,
2006.
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| Subjects: |
MARC
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| 245 | 0 | 0 | |a Vibrational Spectroscopy and X-ray Diffraction of Cd(OH)2 to 28GPa at 300 K |h [electronic resource] |
| 260 | |a Washington, D.C. : |b United States. Department of Energy. ; |a Oak Ridge, Tenn. : |b distributed by the Office of Scientific and Technical Information, U.S. Department of Energy, |c 2006. | ||
| 336 | |a text |b txt |2 rdacontent. | ||
| 337 | |a computer |b c |2 rdamedia. | ||
| 338 | |a online resource |b cr |2 rdacarrier. | ||
| 500 | |a Published through SciTech Connect. | ||
| 500 | |a 03/20/2006. | ||
| 500 | |a "lbnl--59878" | ||
| 500 | |a ": KC0204016" | ||
| 500 | |a Physical Review B 74 2 ISSN 0163-1829; PRBMDO FT. | ||
| 500 | |a Shim, Sang-Heon; Rekhi, Sandeep; Martin, Michael C.; Jeanloz,Raymond. | ||
| 520 | 3 | |a We report Raman and infrared absorption spectroscopy alongwith X-ray diffraction for brucite-type beta-Cd(OH)2 to 28 GPa at 300 K.The OH-stretching modes soften with pressure and disappear at 21 GPa withtheir widths increasing rapidly above 5 GPa, consistent with a gradualdisordering of the H sublattice at 5 20 GPa similar to that previouslyobserved for Co(OH)2.Asymmetry in the peak shapes of the OH-stretchingmodes suggests the existence of diverse disordered sitesfor H atoms inCd(OH)2 under pressure. Above 15 GPa, the A1g(T) lattice mode showsnon-linear behavior and softens to 21 GPa, at which pressure significantchanges are observed: new Raman modes appear, two Raman-active latticemodes and the OH-stretching modes of the low-pressure phase disappears,and the positions of some X-ray diffraction lines change abruptly withthe appearance of weak new diffraction features. These observationssuggest that amorphization of the H sublattice is accompanied by acrystalline-to-crystalline transition at 21 GPa in Cd(OH)2, which has notbeen previously observed in the brucite-type hydroxides. The Ramanspectra of the high-pressure phase of Cd(OH)2 is similar to those of thehigh-pressure phase of single-crystal Ca(OH)2 of which structure has beententatively assigned to the Sr(OH)2 type. | |
| 520 | 0 | |a Advanced Light Source Als. | |
| 536 | |b DE-AC02-05CH11231. | ||
| 536 | |b NSF:EAR-0337697,EAR-0337005. | ||
| 536 | |b 458121. | ||
| 650 | 7 | |a Absorption Spectroscopy. |2 local. | |
| 650 | 7 | |a Atoms. |2 local. | |
| 650 | 7 | |a Diffraction. |2 local. | |
| 650 | 7 | |a Hydroxides. |2 local. | |
| 650 | 7 | |a Raman Spectra. |2 local. | |
| 650 | 7 | |a Spectroscopy. |2 local. | |
| 650 | 7 | |a X-Ray Diffraction. |2 local. | |
| 650 | 7 | |a Geosciences. |2 edbsc. | |
| 710 | 2 | |a Massachusetts Institute of Technology. |4 res. | |
| 710 | 1 | |a United States. |b Department of Energy. |4 spn. | |
| 710 | 2 | |a National Science Foundation (U.S.). |4 spn. | |
| 710 | 1 | |a United States. |b Department of Energy. |b Office of Scientific and Technical Information. |4 dst. | |
| 856 | 4 | 0 | |u http://www.osti.gov/scitech/biblio/919766 |z Online Access (via OSTI) |
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