Journal
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
Volume 67, Issue 9-10, Pages 1914-1917Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jpcs.2006.05.058
Keywords
high pressure; equations-of-state; X-ray diffraction
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The high-pressure behavior of molybdenum disulfide (MoS2) has been investigated using an energy dispersive synchrotron X-ray diffraction method in a diamond anvil cell to 38.8 GPa at room temperature. It is found that the c-axis I compression ratio is about three times larger than a-axis at pressures below 10 GPa. It gradually decreases with increasing pressure, and reduces to two times above 28.9 GPa. The reduction of c-axis with pressure displayed a discontinuity between 20.5 and 28.9 GPa. This may result from a phase transformation. The experimental pressure-volume data below 20.5 GPa were fitted with the third-order Birch-Murnaghan equation of state, and the bulk modulus was obtained as K-0T = 53.4 +/- 1 GPa and its pressure derivative as K-0T = 9.2 + 0.4. (c) 2006 Elsevier Ltd. All rights reserved.
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