1990 – 1994

1994

129. Hemley, R. J., C. T. Prewitt and K. J. Kingma, High-pressure behavior of silica, High-pressure behavior of silica, in Reviews of Mineralogy (eds. P. Heaney, Gibbs, G. V. and Prewitt, C. T.) 41-81 (Mineralogical Society of America, Washington, D.C., 1994).

128. Eggert, J. H., R. J. Hemley, H. K. Mao and J. L. Feldman, Rotation-vibration and intermolecular dynamics of hydrogen and deuterium, in High-Pressure Science and Technology - 1993 (eds. S. C. Schmidt, Shaner, J. W., Samara, G. A. and Ross, M.) 845-848 (American Institute of Physics, New York, 1994).

127. Mao, H. K. and R. J. Hemley, Raman scattering from high pressure solids of hydrogen and deuterium, in Proceedings of the Fourteenth International Conference on Raman Spectroscopy, (eds. N. Yu and X. Li) 828-829 (John Wiley & Sons, New York, 1994).

126. Zha, C. S., R. J. Hemley, H. K. Mao, T. S. Duffy, and C. Meade, Acoustic velocities and refractive index of SiO2 glass to 57.5 GPa by Brillouin scattering, Phys. Rev. B, 50, 13105-13112 (1994).PDF

125. Mao, H. K. and R. J. Hemley, Materials science at ultrahigh pressures, in Advanced Materials '94, (eds. M. Kamo, et al.) 229-234 (National Institute for Research in Inorganic Materials, Tsukuba, Japan, 1994).

124. Jeanloz, R. and R. J. Hemley, Thermoelasticity of perovskite: an emerging consensus, Eos Trans. Am. Geophys. Union, 75,476-477 (1994).

123. Mao, H. K., J. Shu, J. Hu, and R. J. Hemley, High-pressure x-ray diffraction study of diaspore, Solid State Comm., 90, 497-500 (1994). PDF

122. Reichlin, R., A. K. McMahan, M. Ross, S. Martin, J. Hu, R. J. Hemley, H. K. Mao, and Y. Wu, Optical, x-ray, and band-structure studies of iodine at pressures of several megabars, Phys. Rev. B, 49, 3725-3733 (1994). (PDF)

121. Kingma, K. J., R. J. Hemley, H. K. Mao, and D. R. Veblen, Reply to Comment by L. E. McNeil and M. Grimsditch, on "New high-pressure transformation in alpha-quartz," Phys. Rev. Lett., 72, 1302 (1994). PDF

120. Palmer, D. C., R. J. Hemley, and C. T. Prewitt, Raman spectroscopic study of high-pressure phase transitions in cristobalite, Phys. Chem. Minerals, 21, 481-488 (1994).

119. Mao, H. K. and R. J. Hemley, Ultrahigh-pressure transitions in solid hydrogen, Rev. Mod. Phys., 66, 671-692 (1994).

118. Reffner, J., G. L. Carr, S. Sutton, R. J. Hemley, and G. P. Williams, Infrared microspectroscopy at the NSLS, Synchrotron Radiation News, 7, 30-37 (1994).

117. Duffy, T. S., W. L. Vos, C. S. Zha, R. J. Hemley, and H. K. Mao, Sound velocities in dense hydrogen and the interior of Jupiter, Science, 263, 1590-1593 (1994). PDF

116. Hemley, R. J., Z. G. Soos, M. Hanfland, and H. K. Mao, Charge-transfer states in dense hydrogen, Nature, 369, 384-387 (1994).

115. Kingma, K. J., and R. J. Hemley, Raman spectroscopic study of microcrystalline silica, Am. Mineral., 79, 269-273 (1994).

114. Mao, H. K., R. J. Hemley and A. L. Mao, Recent design of ultrahigh-pressure diamond cell, in High Pressure Science and Technology - 1993 (eds. S. C. Schmidt, Shaner, J. W., Samara, G. A. and Ross, M.) 1613-1616 (AIP Press, New York, 1994).

113. Hanfland, M., R. J. Hemley and H. K. Mao, Synchrotron infrared measurements of pressure- induced transformations in solid hydrogen, in High-Pressure Science and Technology - 1993 (eds. S. C. Schmidt, Shaner, J. W., Samara, G. A. and Ross, M.) 877-880 (American Institute of Physics, New York, 1994).

112. Zha, C. S., T. S. Duffy, H. K. Mao and R. J. Hemley, in High-Pressure Science and Technology - 1993 (eds. S. C. Schmidt, Shaner, J. W., Samara, G. A. and Ross, M.) 873-876 (American Institute of Physics, New York, 1994).

111. Vos, W. L., L. W. Finger, R. J. Hemley, H. K. Mao and H. S. Yoder, Phase behavior of H2-H2O at high pressure, in High Pressure Science and Technology - 1993 (eds. S. C. Schmidt, Shaner, J. W., Samara, G. A. and Ross, M.) 857-860 (AIP Press, New York, 1994).

110. Eggert, J. H., R. J. Hemley, H. K. Mao and J. L. Feldman, Rotation-vibration and intermolecular dynamics of hydrogen and deuterium, in High-Pressure Science and Technology - 1993 (eds. S. C. Schmidt, Shaner, J. W., Samara, G. A. and Ross, M.) 845-848 (American Institute of Physics, New York, 1994).

109. Hu, J., H.-k. Mao, J. Shu and R. J. Hemley, High pressure energy dispersive x-ray diffraction technique with synchrotron radiation, in High Pressure Science and Technology - 1993 (eds. S. C. Schmidt, Shaner, J. W., Samara, G. A. and Ross, M.) 441-444 (AIP Press, New York, 1994).

108. Zha, C. S., T. S. Duffy, H. K. Mao and R. J. Hemley, Brillouin scattering of silica glass to 57.5 GPa, in High-Pressure Science and Technology - 1993 (eds. S. C. Schmidt, Shaner, J. W., Samara, G. A. and Ross, M.) 93-96 (American Institute of Physics, New York, 1994).

107. Kingma, K. J., R. J. Hemley, D. R. Veblen and H. K. Mao, High-pressure crystalline transformations and amorphization in a-quartz, in High-Pressure Science and Technology - 1993 (eds. S. C. Schmidt, Shaner, J. W., Samara, G. A. and Ross, M.) 39-42 (American Institute of Physics, New York, 1994).

106. Eggert, J. H., H. K. Mao, and R. J. Hemley, Bivibron linewidths in solid deuterium at high pressure, J. Lumin., 58, 328-331 (1994). PDF

1993

105. Williams, Q., R. J. Hemley, M. B. Kruger and R. Jeanloz, High pressure infrared spectra of α- quartz, coesite, stishovite and amorphous silica, J. Geophys. Res., 98, 22157-22170 (1993).

104. Zha, C. S., T. S. Duffy, H. K. Mao, and R. J. Hemley, Elasticity of hydrogen to 24 GPa from single-crystal Brillouin scattering and synchrotron x-ray diffraction, Phys. Rev. B, 48, 9246-9255 (1993). PDF

103. Vos, W. L., L. W. Finger, R. J. Hemley, and H. K. Mao, Novel H2-H2O clathrates at high pressures, Phys. Rev. Lett., 71, 3150-3153 (1993). PDF

102. Loubeyre, R., R. LeToullec, J. P. Pinceaux, H. K. Mao, J. Hu, and R. J. Hemley, Equation of state and phase diagram of solid 4He from single-crystal x-ray diffraction over a large P-T domain, Phys. Rev. Lett., 71, 2272-2275 (1993). PDF

101. Kingma, K. J., R. J. Hemley, H. K. Mao, and D. R. Veblen, New high-pressure transformation in alpha-quartz, Phys. Rev. Lett., 70, 3927-3930 (1993). PDF

100. Hemley, R. J., H. K. Mao, M. Hanfland, J. H. Eggert, C. S. Zha and J. F. Shu, Experimental investigations of dense solid hydrogen, in Physics of Strongly Coupled Plasmas (eds. H. M. Van Horn and Ichimaru, S.) (1993).

99. Hemley, R. J., J. H. Eggert, and H. K. Mao, Low-frequency Raman spectroscopy of deuterium to megabar pressures at 77-295 K, Phys. Rev. B, 48, 5779-5788 (1993). PDF

98. Hanfland, M., R. J. Hemley and H. K. Mao, Novel infrared vibron absorption in solid hydrogen at megabar pressures, Phys. Rev. Lett., 70, 3760-3763 (1993). PDF

97. Fei, Y., H. K. Mao, and R. J. Hemley, Thermal expansivity, bulk modulus, and melting curve of H2O-ice VII to 20 GPa, J. Chem. Phys., 99, 5369-5373 (1993).

96. Eggert, J. H., H. K. Mao, and R. J. Hemley, Observation of a two-vibron bound-to-unbound transition in solid deuterium at high pressure, Phys. Rev. Lett., 70, 2301-2304 (1993). PDF

95. Kingma, K. J., C. Meade, R. J. Hemley, H. K. Mao, and D. R. Veblen, Microstructural observation of alpha-quartz amorphization, Science, 259, 666-669 (1993).

1992

94. Meade, C., R. J. Hemley, and H. K. Mao, High-pressure x-ray diffraction of SiO2 glass, Phys. Rev. Lett., 69, 1387-1390 (1992). PDF

93. Hanfland, M., R. J. Hemley, H. K. Mao, and G. P. Williams, Synchrotron infrared spectroscopy at megabar pressures: vibrational dynamics of hydrogen to 180 GPa, Phys. Rev. Lett., 69, 1129-1132 (1992). PDF

92. Eggert, J. H., C. S. Zha, R. J. Hemley, and H. K. Mao, Raman scattering of vibrational overtones in deuterium at high pressures, J. Low Temp. Phys., 89, 707-710 (1992).

91. Stixrude, L., R. J. Hemley, Y. Fei, and H. K. Mao, Thermoelasticity of silicate perovskite and magnesiowüstite and stratification of the Earth's mantle, Science, 257, 1099-1101 (1992).

90. Vos, W. L., L. W. Finger, R. J. Hemley, J. Z. Hu, H. K. Mao, and J. A. Schouten, A high-pressure van der Waals compound in solid nitrogen-helium mixtures, Nature, 358, 46-48 (1992).

89. Hemley, R. J. and H. K. Mao, Static compression to multimegabar pressures, in Proceedings of the APS 1991 Topical Conference on Shock Compression of Condensed Matter, June 17-20, 1991, Elsevier, New York (eds. S. C. Schmidt, Dick, R. D., Forbes, J. W. and Tasker, D. G.) (Williamsburgh, VA, 1992).

88. Meade, C., R. Jeanloz and R. J. Hemley, Spectroscopic and x-ray diffraction studies of metastable crystal-amorphous transitions in Ca(OH)2 and serpentine, in High Pressure Research in Mineral Physics: Application to Earth and Planetary Sciences (eds. Y. Syono and Manghnani, M.) (Terra Scientific Publishing Co, in press, 1992).

87. Hemley, R. J., L. Stixrude, Y. Fei and H. K. Mao, Constraints on the composition of the lower mantle from P-V-T measurements of (Fe,Mg)SiO3-perovskite and (Fe,Mg)O, in High-Pressure Research in Mineral Physics: Application to Earth and Planetary Sciences (eds. Y. Syono and Manghnani, M.) (Terra Scientific Publishing Co (TERRAPUB), Washington, D. C., 1992).

86. Badding, J. V., H. K. Mao and R. J. Hemley, High-pressure crystal structure and equation of state of iron hydride: Implications for the Earth's Core, in High Pressure Research in Mineral Physics: Application to Earth and Planetary Sciences (eds. Y. Syono and Manghnani, M.) (Terra Scientific Publishing Co (TERRAPUB), Washington, DC, 1992).

85. Hemley, R. J. and H. K. Mao, Raman studies of dense hydrogen: constraints on structure, dynamics, and metallization, in ICORS Wurzburg '92 - Thirteenth International Conference on Raman Spectroscopy (eds. W. Kiefer, Cardona, M., Schaack, G., Schneider, F. W. and Schrotter, H. W.) 762-763 (J. Wiley & Sons, New York, 1992).

84. Mao, H. K., and R. J. Hemley, Hydrogen at high pressure, Am. Scientist, 80, 234-247 (1992).

83. Hemley, R. J. and H. K. Mao, Metallic hydrogen, in McGraw-Hill Yearbook of Science and Technology, 207-209 (McGraw-Hill, New York, 1992).

82. Hemley, R. J., and H. K. Mao, Anomalous low-frequency excitations in diamond-cell studies of hydrogen at megabar pressures, Phys. Lett. A, 163, 429-434, 1992. (PDF)

81. Mao, H. K., R. J. Hemley, and M. Hanfland, Stability of ruby in solid hydrogen at megabar pressures, Phys. Rev. B, 45, 8108-8111 (1992). PDF

80. Hemley, R. J., and R. E. Cohen, Silicate perovskite, Ann. Rev. Earth Planet. Sci., 20, 553-600 (1992).

79. Kubicki, J. D., R. J. Hemley, and A. M. Hofmeister, Raman and infrared study of pressure-induced structural changes in MgSiO3, CaMgSi2O6 and CaSiO3 glasses, Am. Mineral., 77, 258-269 (1992).

1991

78. Vos, W. L., L. W. Finger, R. J. Hemley, H. K. Mao, J. Hu, J. Shu, R. LeSar, A. deKuijper, and J. A. Schouten, X-ray diffraction of solid nitrogen-helium mixtures, Ann. Rep.. Geophys. Lab., 138-141 (1991).

77. Mao, H. K., R. J. Hemley, Y. Fei, J. F. Shu, L. C. Chen, A. P. Jephcoat, Y. Wu, and W. A. Bassett, Effect of pressure, temperature, and composition on lattice parameters and density of (Fe,Mg)SiO3-perovskites to 30 GPa, J. Geophys. Res., 96, 8069-8079 (1991).

76. Mao, H. K., and R. J. Hemley, Optical transitions in diamond at ultrahigh pressures, Nature, 351, 721-724 (1991).

75. Kaxiras, E., J. Broughton, and R. J. Hemley, Onset of metallization and related transitions in solid hydrogen, Phys. Rev. Lett., 67, 1138-1141 (1991). PDF

74. Hemley, R. J., H. K. Mao and M. Hanfland, Spectroscopic investigations of the insulator-metal transition in solid hydrogen, in Molecular Systems under High Pressure, Proceeding of the II Archimedes Workshop "Molecular solid under pressure", Catania, May 21-31, 1990 (eds. R. Pucci and Piccitto, G.) 223-243 (Elsevier, Amsterdam, 1991).

73. Hemley, R. J., and Kubicki, J. D., Deep mantle melting, Nature , 349, 283-284 (1991).

72. Hemley, R. J., M. Hanfland, and H. K. Mao, High-pressure dielectric measurements of solid hydrogen to 170 GPa, Nature, 350, 488-491 (1991).

71. Hanfland, M., R. J. Hemley, and H. K. Mao, Optical absorption measurements of hydrogen at megabar pressures, Phys. Rev. B, 43, 8767-8770 (1991). PDF

70. Fei, Y., H. K. Mao, R. J. Hemley, and J. Shu, Simultaneous high P-T diffraction measurements of (Fe,Mg)SiO3-perovskite and (Fe,Mg)O magnesiowüstite: implications for lower mantle composition, Ann. Rep. Geophys. Lab., 107-114 (1991).

69. Badding, J. V., H. K. Mao, and R. J. Hemley, High-pressure synchrotron x-ray diffraction of Cs IV and Cs V, Solid State Comm., 77, 801-805 (1991). PDF

68. Badding, J. V., R. J. Hemley, and H. K. Mao, High pressure chemistry of hydrogen in metals: In-situ study of iron hydride, Science, 253, 421-424 (1991).

1990

67. Hanfland, M., Hemley, R. J., and Mao, H. K., Optical properties of hydrogen at megabar pressures, Annual Report of the Director of the Geophysical Laboratory, Carnegie Institution of Washington, 1989-1990, Geophysical Laboratory, Washington, D.C. 96-100 (1990).

66. Hemley, R. J., H. K. Mao, and J. F. Shu, Low-frequency vibrational dynamics and structure of hydrogen at megabar pressures, Phys. Rev. Lett., 65, 2670-2673 (1990). PDF

65. Hemley, R. J., H. K. Mao, L. W. Finger, A. P. Jephcoat, R. M. Hazen, and C. S. Zha, Equation of state of solid hydrogen and deuterium from single-crystal x-ray diffraction to 26.5 GPa, Phys. Rev. B, 42, 6458-6470 (1990). (PDF)

64. Mao, H. K., R. J. Hemley, and M. Hanfland, Infrared reflectance measurements of the insulator-metal transition in solid hydrogen, Phys. Rev. Lett, 65, 484-487 (1990). PDF

63. Hemley, R. J., and H. K. Mao, Critical behavior in the hydrogen insulator-metal transition, Science, 249, 391-393 (1990). PDF

62. Mao, H. K., Y. Wu, L. C. Chen, J. F. Shu, and R. J. Hemley, Pressure calibration to 304 GPa on the basis of X-ray diffraction measurements of Pt, Fe and CsI, (Proceedings of the XIIth International AIRAPT Conference, Paderborn, West Germany, July 18-21, 1989), High Pressure Res., 5, 773-775 (1990).

61. Hemley, R. J., and H. K. Mao, Structural transitions in hydrogen and deuterium at ultrahigh pressures, High Pressure Science and Technology (Proceedings of the XIIth International AIRAPT Conference, Paderborn, West Germany, July 18-21, 1989), High Pressure Res., 3, 156-158 (1990).

60. Mao, H. K., and R. J. Hemley, Response to Technical Comment by I. F. Silvera, Science, 247, 863-864 (1990). PDF

59. Mao, H. K., Y. Wu, J. F. Shu, J. Z. Hu, R. J. Hemley, and D. E. Cox, High-pressure phase transition and equation of state of lead to 238 GPa, Solid State Comm., 74, 1027-1029 (1990). PDF

58. Mao, H. K., Y. Wu, R. J. Hemley, L. C. Chen, J. F. Shu, L. W. Finger, and D. E. Cox, High-pressure phase transition and equation of state of CsI, Phys. Rev. Lett., 64, 1749-1752 (1990). PDF