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4
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0029659563
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S. K. Saxena et al., ibid. 274, 1357 (1996).
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Saxena, S.K.1
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5
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0007038967
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We laser-heated samples in a large variety of pressure media and found that the laser power required in a NaCl pressure medium is markedly higher than that for CsCl or KBr media. This result is consistent with a comparative study of several alkali halides, where the thermal conductivity of NaCl in the B2 structure was estimated to be at least three times that of CsCl [G. A. Slack and R. G. Ross, J. Phys. C 18, 3957 (1985)).
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J. Phys. C
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Slack, G.A.1
Ross, R.G.2
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6
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3543031272
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note
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2 laser techniques of order 1000 K.
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-
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7
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0000653342
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YAG laser heating without thermally insulating media causes temperature gradients in silicates ranging from 100° to 1000° per micrometer depending on the peak temperature [D. L. Heinz and R. Jeanloz, J. Geophys. Res. 92, 11437 (1987)].
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(1987)
J. Geophys. Res.
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, pp. 11437
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Heinz, D.L.1
Jeanloz, R.2
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11
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0005755473
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Y. Syono and M. H. Manghnani, Eds. American Geophysical Union, Washington, DC
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R. Boehler and A. Chopelas, in High Pressure Research: Applications to Earth and Planetary Sciences, Y. Syono and M. H. Manghnani, Eds. (American Geophysical Union, Washington, DC, 1992), pp. 55-60.
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(1992)
High Pressure Research: Applications to Earth and Planetary Sciences
, pp. 55-60
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Boehler, R.1
Chopelas, A.2
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12
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0000587529
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Y. Syono and M. H. Manghnani, Eds. American Geophysical Union, Washington, DC
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A. Chopelas and R. Boehler, in High Pressure Research: Applications to Earth and Planetary Sciences, Y. Syono and M. H. Manghnani, Eds. (American Geophysical Union, Washington, DC, 1992), pp. 101-108.
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(1992)
High Pressure Research: Applications to Earth and Planetary Sciences
, pp. 101-108
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Chopelas, A.1
Boehler, R.2
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14
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3543024156
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note
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The emitted light from the sample was measured from areas of 2 to 3 μm in diameter in the center of the hot spot with a charge-coupled device (CCD) detector in the wavelength range of 500 to 815 nm. Emissivity was taken to be independent of the wavelength.
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-
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15
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3543037240
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note
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0.15O was provided by S. Kesson (Australian National University). Powder mixtures with 1-to 2-μm grain size were compressed at about 5 GPa with a DAC to form pellets with about 10-μm thickness.
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16
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3542991729
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note
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The orthoenstatite sample was from the Smithsonian Institute (#137311).
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17
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3543011630
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note
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2 laser and rapid quenching between two platinum-plated copper blocks.
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19
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0028792960
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J. K. Kingma, R. E. Cohen, R. J. Hemley, H. K. Mao, Nature 374, 243 (1995).
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(1995)
Nature
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Kingma, J.K.1
Cohen, R.E.2
Hemley, R.J.3
Mao, H.K.4
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20
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3543048245
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note
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-1 lower. Upon pressure release, the position of the Raman modes matches those measured previously.
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21
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3542994103
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note
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-1 in the spectrum taken at 15 GPa (Fig. 3B).
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22
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0031816465
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G. Serghiou, A. Zerr, A. Chopelas, R. Boehler, Phys. Chem. Miner. 25, 193 (1998).
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(1998)
Phys. Chem. Miner.
, vol.25
, pp. 193
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Serghiou, G.1
Zerr, A.2
Chopelas, A.3
Boehler, R.4
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23
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0006620376
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M. D. Dyar, C. McCammon, M. W. Schaefer, Eds. Special Publication 5, Geochemical Society, Columbus, OH
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A. Chopelas, in Mineral Spectroscopy: A Tribute to Roger Burns, M. D. Dyar, C. McCammon, M. W. Schaefer, Eds. (Special Publication 5, Geochemical Society, Columbus, OH, 1996), pp. 229-242.
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(1996)
Mineral Spectroscopy: A Tribute to Roger Burns
, pp. 229-242
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Chopelas, A.1
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24
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3542993498
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note
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Raman and fluorescence spectra from the samples were excited with the 457.9-nm line of a Spectra Physics 2025-5 argon ion laser. The laser light entered the diamond cell at an incident angle of 25° and was focused to a 15-μm spot on the sample with powers ranging from 5 to 100 mW depending on pressure. The signal was detected with a liquid nitrogen-cooled CCD detector or a photomultiplier. Spectra were taken at room temperature from the laser-heated spot.
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-
-
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25
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3543022950
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3+ on part per million levels in MgO crystals has been detected by this method [A. M. Glass, J. Chem. Phys. 46, 2080 (1967)].
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(1967)
J. Chem. Phys.
, vol.46
, pp. 2080
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Glass, A.M.1
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27
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3543018752
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note
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We thank A. Chopelas, O. Tschauner, V. Hillgren, and L. Nigay for many helpful discussions.
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