한국광물학회지 (Journal of the Mineralogical Society of Korea)
- 제12권1호
- /
- Pages.1-10
- /
- 1999
- /
- 1225-309X(pISSN)
- /
- 2288-7172(eISSN)
천연산 활석에 대한 고압 X-선 회절연구
High Pressure X-ray Diffraction Studies on a Natural Talc
초록
Talc (Mg3Si4O10(OH)2), one of the sheet silicate minerals, which is the hydrothermal alteration product of serpentinite at Cheongarm mine was prepared for the high pressure compressibility studies. Energy dispersive X-ray diffraction experiment was carried out using the Synchrotron Radiation with the Mao-Bell type diamond anvil cell at room temperature. Polycrystalline talc was mixed with MgO powder for pressure sensor as well as pressure medium in the sample chamber. High pressure runs were performed at pressures up to 35.2 GPa. Talc shows no phase transition within the present high pressure region. Bulk modulus of this talc was determined by the Birch-Murnaghan equation of state to be 78 GPa assuming its first pressure derivative Ko' of 4.
키워드