The Journal of the Petrological Society of Korea (암석학회지)

The Petrological Society of Korea (한국암석학회)
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Phase Transition Study on Graphite at Room Temperature

고압하에서 방사광을 이용한 흑연에 대한 연구

  • Kim, Young-Ho (Department of Earth and Environmental Sciences and Basic Science Research Institute) ;
  • Na, Ki-Chang (Department of Earth and Environmental Sciences, Choongbuk National University)
  • Published : 1997.10.01
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Abstract

High pressure X-ray diffraction study was carried out on a polycrystalline graphite to investigate the phase transition(s) at room temperature. Energy dispersive X-ray diffraction method was employed using a Mao-Bell type diamond anvil cell with an Wiggler synchrotron Radiation at the National Synchrotron Light Source. Sodium chloride power was used as the internal pressure sensor for the high pressure determinations as well as the pressure medium for quasihydrostatic pressure environment. Graphite transforms into a hexagonal didose not agree with the previously reported observations and this phase persists when pressure is released down to 0.1 MPa. This result dose not agree with the previously reported observations and this discrepancy would be due to the kinetics in phase transition as well as the uniaxially oriented pressure field in the diamond anvil cell.

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