Zobrazeno 1 - 10
of 38
pro vyhledávání: '"Stephen A. Gramsch"'
Autor:
Stephen A. Gramsch, Keenan Brownsberger, Maddury Somayazulu, Changyong Park, Muhtar Ahart, Russell J. Hemley
Publikováno v:
The Journal of Physical Chemistry C. 121:27327-27331
High-pressure X-ray diffraction of PdHx and PdDx demonstrates that these materials remain in a face-centered cubic (fcc, Fm3m) structure to megabar pressures at room temperature. The volumes indicate stoichiometric compositions under pressure with x
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3886f17b5eb8f81f75fbae91068f59c8
https://doi.org/10.1021/acs.jpcc.7b09290
https://doi.org/10.1021/acs.jpcc.7b09290
Autor:
S. A. Kharlamova, Atsushi Kyono, Viktor V. Struzhkin, Ho-kwang Mao, Yuki Nakamoto, Russell J. Hemley, Takamitsu Yamanaka, Stephen A. Gramsch
Publikováno v:
American Mineralogist. 100:1736-1743
A structural change in Fe2SiO4 spinel (ringwoodite) has been found by synchrotron powder diffraction study and the structure of a new high-pressure phase was determined by Monte-Carlo simulation method and Rietveld profile fitting of X-ray diffractio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d6926024af056fb4aa2ad92466efd37
https://doi.org/10.2138/am-2015-4744
https://doi.org/10.2138/am-2015-4744
Autor:
Atsushi Kyono, Yuki Nakamoto, Stephen A. Gramsch, Masato Kato, Tomoya Tamura, Masafumi Sakata, Takamitsu Yamanaka
Publikováno v:
American Mineralogist. 100:1752-1761
The Jahn-Teller effect at Cu2+ in cuprospinel CuFe2O4 was investigated using high-pressure single-crystal synchrotron X-ray diffraction techniques at beamline BL10A at the Photon Factory, KEK, Japan. Six data sets were collected in the pressure range
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8bffb0867fa43dfff4dbcccdfb54d5d7
https://doi.org/10.2138/am-2015-5224
https://doi.org/10.2138/am-2015-5224
Publikováno v:
High Pressure Research. 34:327-336
The properties of solid and liquid phases of H2O at high pressure and temperature remain an active area of research. In this study, Brillouin spectroscopy has been used to determine the temperature dependence of sound velocities in H2O as a function
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cccc45d20621df5b64e94b306e535f4e
https://doi.org/10.1080/08957959.2014.946504
https://doi.org/10.1080/08957959.2014.946504
Autor:
Daijo Ikuta, Takamitsu Yamanaka, Bjorn O. Mysen, Atsushi Kyono, Ho-kwang Mao, Muhtar Ahart, Russell J. Hemley, Stephen A. Gramsch
Publikováno v:
Physics and Chemistry of Minerals. 39:131-141
The crystal structure of chromite FeCr2O4 was investigated to 13.7 GPa and ambient temperature with single-crystal X-ray diffraction techniques. The unit-cell parameter decreases continuously from 8.3832 (5) to 8.2398 (11) A up to 11.8 GPa. A fit to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::425b50774961267dbd11c94c310b6049
https://doi.org/10.1007/s00269-011-0468-6
https://doi.org/10.1007/s00269-011-0468-6
Autor:
Stephen A. Gramsch, Russell J. Hemley, Ho-kwang Mao, Muhtar Ahart, Takamitsu Yamanaka, Atsushi Kyono
Publikováno v:
American Mineralogist. 96:1193-1198
We report in situ Raman spectroscopic studies of ulvospinel in a diamond-anvil cell under hydrostatic conditions up to 57 GPa at room temperature. Two modes near 493 and 681 cm −1 are observed clearly at 1 GPa. In the cubic spinel structure, the lo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a7eef068abc636f5c83741f0498c475a
https://doi.org/10.2138/am.2011.3707
https://doi.org/10.2138/am.2011.3707
Autor:
Erik D. Emmons, Vamsi Krishna Kamisetty, Aaron Covington, Raja Chellappa, Russell J. Hemley, Juan C. Fallas, Stephen A. Gramsch, Wen-Ming Chien, Dhanesh Chandra
Publikováno v:
The Journal of Physical Chemistry B. 114:5649-5656
High-pressure Raman spectroscopy has been used to study tris(hydroxymethyl)aminomethane (C(CH(2)OH)(3)NH(2), Tris). Molecules with globular shapes such as Tris have been studied thoroughly as a function of temperature and are of fundamental interest
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4bde6f57c5da561bf6d4f6bbbe2156d7
https://doi.org/10.1021/jp9092892
https://doi.org/10.1021/jp9092892
Autor:
Yue, Meng, Peter J, Eng, John S, Tse, Dawn M, Shaw, Michael Y, Hu, Jinfu, Shu, Stephen A, Gramsch, Chi-chang, Kao, Chichang, Kao, Russell J, Hemley, Ho-Kwang, Mao
Publikováno v:
Proceedings of the National Academy of Sciences. 105:11640-11644
The detailing of the intermolecular interactions in dense solid oxygen is essential for an understanding of the rich polymorphism and remarkable properties of this element at high pressure. Synchrotron inelastic x-ray scattering measurements of oxyge
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::48a513898dffa9282a5c6f29a8a53f2c
https://doi.org/10.1073/pnas.0805601105
https://doi.org/10.1073/pnas.0805601105
Publikováno v:
The Journal of Physical Chemistry B. 111:10785-10789
In situ high-pressure Raman spectroscopy studies on LiNH2 (lithium amide) have been performed at pressures up to 25 GPa. The pressure-induced changes in the Raman spectra of LiNH2 indicates a phase transition that begins at approximately 12 GPa is co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fe019f12e3d4274988cb18540b175525
https://doi.org/10.1021/jp073206w
https://doi.org/10.1021/jp073206w
Autor:
Dhanesh Chandra, Russell J. Hemley, Jung-Fu Lin, Raja Chellappa, Stephen A. Gramsch, Yang Song
Publikováno v:
The Journal of Physical Chemistry B. 110:11088-11097
The pressure-induced phase transformations in pure LiAlH4 have been studied using in situ Raman spectroscopy up to 7 GPa. The analyses of Raman spectra reveal a phase transition at approximately 3 GPa from the ambient pressure monoclinic alpha-LiAlH4
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b26a102dcaa3ab9d8411ef90e8f69a61
https://doi.org/10.1021/jp060473d
https://doi.org/10.1021/jp060473d