| 1. |
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| 2. |
- Dubrovinskaia, NA, et al.
(författare)
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Direct transition from cristobalite to post-stishovite alpha-PbO2-like silica phase
- 2001
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Ingår i: EUROPEAN JOURNAL OF MINERALOGY. - : E SCHWEIZERBARTSCHE VERLAGS. - 0935-1221. ; 13:3, s. 479-483
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Tidskriftsartikel (refereegranskat)abstract
- In situ X-ray studies in diamond anvil cells at pressures over 80 GPa were used to determine a stable silica phase at extreme conditions. We demonstrate that so far unidentified phases obtained on compression of alpha -cristobalite and a new dense silica
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| 3. |
- Dubrovinskaia, NA, et al.
(författare)
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High-pressure silica polymorphs as hardest known oxides
- 2001
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Ingår i: MATERIALS CHEMISTRY AND PHYSICS. - : ELSEVIER SCIENCE SA. - 0254-0584. ; 68:1-3, s. 77-79
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Tidskriftsartikel (refereegranskat)abstract
- We report the results of an experimental study of the silica phases (stishovite and SiO2 with alpha -PbO2 like structure). These phases were synthesized in laser- and externally electrically heated Mao-Bell type diamond anvil cells (DACs) from a-cristobal
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| 4. |
- Dubrovinsky, LS, et al.
(författare)
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Aggregate sound velocities and acoustic Gruneisen parameter of iron up to 300 GPa and 1,200 K
- 2001
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Ingår i: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA. - : NATL ACAD SCIENCES. - 0027-8424. ; 98:17, s. 9484-9489
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Tidskriftsartikel (refereegranskat)abstract
- Successful interpretation of available geophysical data requires experimental and theoretical information on the elasticity of solids under physical conditions of Earth's interior. Because iron is considered as major component in Earth's core, elastic pro
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| 5. |
- Dubrovinsky, LS, et al.
(författare)
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Pressure-induced transformations of cristobalite
- 2001
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Ingår i: CHEMICAL PHYSICS LETTERS. - : ELSEVIER SCIENCE BV. - 0009-2614. ; 333:3-4, s. 264-270
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Tidskriftsartikel (refereegranskat)abstract
- X-ray in situ studies in electrically and laser-heated diamond anvil cells (DACs) at pressures over 80 cpa and temperatures above 2500 K were used to determine stable silica phase at extreme conditions. We demonstrate that so far unidentified phases obtai
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| 6. |
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| 7. |
- Swamy, V, et al.
(författare)
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Atomistic simulation of the crystal structures and bulk moduli of TiO2 polymorphs
- 2001
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Ingår i: JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS. - : PERGAMON-ELSEVIER SCIENCE LTD. - 0022-3697. ; 62:5, s. 887-895
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Tidskriftsartikel (refereegranskat)abstract
- The crystal structures and bulk moduli of the known or proposed TiO2 polymorphs (which include the low-pressure forms rutile, anatase, brookite, TiO2(B), TiO2(H) and TiO2(R), and the high-pressure columbite-, baddeleyite-, cotunnite-, pyrite-, and fluorit
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| 8. |
- Swamy, V, et al.
(författare)
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Bulk modulus of anatase
- 2001
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Ingår i: JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS. - : PERGAMON-ELSEVIER SCIENCE LTD. - 0022-3697. ; 62:4, s. 673-675
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Tidskriftsartikel (refereegranskat)abstract
- Room-temperature volume versus pressure data of anatase was obtained from X-ray diffraction measurements in a diamond anvil cell up to 7.8 GPa. A fit of the pressure-volume data to a Birch-Murnaghan equation of state with an assumed pressure derivative K'
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| 9. |
- Talyzin, AV, et al.
(författare)
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In situ Raman study of C-60 thin films at high pressures - art. no. 113408
- 2001
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Ingår i: PHYSICAL REVIEW B. - 0163-1829. ; 6411:11, s. 3408-
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Tidskriftsartikel (refereegranskat)abstract
- Raman spectra from a systematic in situ study of C-60 thin films at nonhydrostatic compression up to 30 GPa are presented in a broad spectral range (200-1800 cm(-1)). The results show that the superhard fullerite obtained at 22.5 GPa transforms back to on
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| 10. |
- Talyzin, AV, et al.
(författare)
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Superhard and superelastic films of polymeric C-60
- 2001
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Ingår i: DIAMOND AND RELATED MATERIALS. - 0925-9635. ; 10:11, s. 2044-2048
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Tidskriftsartikel (refereegranskat)abstract
- The C-60 thin film deposited on steel substrate was transformed by high pressure-high temperature treatment to a superhard and superelastic material. The films were studied by Raman spectroscopy in situ at 20 GPa after heating at 300 degreesC and ex situ
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