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| 2. |
- Saxena, SK, et al.
(författare)
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Stability of perovskite (MgSiO3) in the Earth's mantle
- 1996
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Ingår i: SCIENCE. - 0036-8075. ; 274:5291, s. 1357-1359
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Tidskriftsartikel (refereegranskat)abstract
- Available thermodynamic data and seismic models favor perovskite (MgSiO3) as the stable phase in the mantle. MgSiO3 was heated at temperatures from 1900 to 3200 kelvin with a Nd-YAG laser in diamond-anvil cells to study the phase relations at pressures fr
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| 3. |
- Dubrovinsky, LS, et al.
(författare)
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Experimental and theoretical identification of a new high-pressure phase of silica
- 1997
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Ingår i: NATURE. - 0028-0836. ; 388:6640, s. 362-365
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Tidskriftsartikel (refereegranskat)abstract
- Following the discovery of stishovite (the highest-pressure polymorph of silica known from natural samples), many attempts have been made to investigate the possible existence of denser phases of silica at higher pressures. Based on the crystal structures
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| 4. |
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| 5. |
- Dubrovinsky, LS, et al.
(författare)
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Stability of beta-iron: A new synchrotron X-ray study of heated iron at high pressure
- 1998
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Ingår i: EUROPEAN JOURNAL OF MINERALOGY. - 0935-1221. ; 10:1, s. 43-47
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Tidskriftsartikel (refereegranskat)abstract
- We have conducted a new study on the stability of the beta-iron phase at high pressure and temperature. With the X-ray study of the electrically heated iron wire at pressures between 35 and 68 GPa, we are able to demonstrate the reversibility of transform
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| 6. |
- Dubrovinsky, LS, et al.
(författare)
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X-ray study of iron with in-situ heating at ultra high pressures
- 1997
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Ingår i: GEOPHYSICAL RESEARCH LETTERS. - 0094-8276. ; 24:14, s. 1835-1838
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Tidskriftsartikel (refereegranskat)abstract
- We provide experimental evidence concerning the structure and the pressure-temperature stability of a new polymorph of iron with the double hexagonal close-packed (DHCP) structure. This experiment was performed by an in-situ electrical heating of an iron-
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| 7. |
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| 8. |
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| 9. |
- SAXENA, SK, et al.
(författare)
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SYNCHROTRON X-RAY STUDY OF IRON AT HIGH-PRESSURE AND TEMPERATURE
- 1995
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Ingår i: SCIENCE. - : AMER ASSOC ADVAN SCIENCE. - 0036-8075. ; 269:5231, s. 1703-1704
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- X-ray synchrotron experiments with in situ laser heating of iron in a diamond-anvil cell show that the high-pressure epsilon phase, a hexagonal close-packed (hcp) structure, transforms to another phase (possibly a polytype double-layer hcp) at a pressure
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| 10. |
- Saxena, SK, et al.
(författare)
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X-ray evidence for the new phase beta-iron at high temperature and high pressure
- 1996
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Ingår i: GEOPHYSICAL RESEARCH LETTERS. - : AMER GEOPHYSICAL UNION. - 0094-8276. ; 23:18, s. 2441-2444
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- X-ray synchrotron study of iron heated between 1400 to 2200 K over a pressure range of 40 to 60 gigapascals confirms previous reports of the transformation of the hexagonal closest packed (HCP) phase of iron (epsilon) to the double HCP Iron (beta). The st
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| 11. |
- Zhang, J, et al.
(författare)
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X-ray diffraction study of magnesite at high pressure and high temperature
- 1997
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Ingår i: PHYSICS AND CHEMISTRY OF MINERALS. - : SPRINGER VERLAG. - 0342-1791. ; 24:2, s. 122-130
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- P-V-T measurements on magnesite MgCO3 have been carried out at high pressure and high temperature up to 8.6 GPa and 1255 K, using a DIA-type, cubic-anvil apparatus (SAM-85) in conjunction with in situ synchrotron X-ray powder diffraction. Precise volumes
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