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| 3. |
- Ahuja, R, et al.
(författare)
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High-pressure structural phase transitions in RuO2 and its geophysical implications
- 2001
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Ingår i: JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS. - : PERGAMON-ELSEVIER SCIENCE LTD. - 0022-3697. ; 62:11, s. 2035-2037
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Tidskriftsartikel (refereegranskat)abstract
- We studied the high-pressure behaviour of RuO2 and compared with that of its analogue SiO2. The high-pressure stability of Pa (3) over bar phase as compared to fluorite (CaF2) phase has been supported through our calculations, which is in full agreement w
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| 5. |
- Ahuja, R, et al.
(författare)
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Theoretical prediction of a phase transition in gold - art. no. 212101
- 2001
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Ingår i: PHYSICAL REVIEW B. - : AMERICAN PHYSICAL SOC. - 0163-1829. ; 6321:21, s. 2101-
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Tidskriftsartikel (refereegranskat)abstract
- We performed theoretical investigations on gold under high pressure through first principles self-consistent total-energy calculations within the local-density approximation as well as generalized gradient approximation using full-potential muffin-tin-orb
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| 6. |
- 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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| 7. |
- 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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| 8. |
- Rekhi, S, et al.
(författare)
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Experimental and theoretical investigations on the compressibility of nanocrystalline nickel
- 2001
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Ingår i: JOURNAL OF MATERIALS SCIENCE. - : KLUWER ACADEMIC PUBL. - 0022-2461. ; 36:19, s. 4719-4721 Language: English
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Tidskriftsartikel (refereegranskat)abstract
- We investigated nanocrystalline nickel experimentally (x-ray diffraction) and theoretically (cluster ab initio calculations). No phase transition was observed in nano-nickel. The volume, isothermal bulk modulus and its pressure derivative derived experime
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| 9. |
- Rekhi, S, et al.
(författare)
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High-pressure Raman study on nanocrystalline CeO2
- 2001
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Ingår i: JOURNAL OF APPLIED PHYSICS. - : AMER INST PHYSICS. - 0021-8979. ; 89:5, s. 2968-2971
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Tidskriftsartikel (refereegranskat)abstract
- To evaluate the reported change in the physical and electronic properties of nanomaterials as compared to bulk material, we performed high-pressure Raman spectroscopy on nanocrystalline CeO2 at room temperature up to a pressure of 36 gigapascals (GPa) wit
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