Phase Transition and EOS of Marmatite (Zn0.76Fe0.23S) up to 623K and 17GPa
JIANG Xi1,3, ZHOU Wen-Ge1, XIE Hong-Sen1, LIU Yong-Gang1, FAN Da-Wei1,3, LIU Jing1,2, LI Yan-Chun2, LUO Chong-Ju2, MA Mai-Ning3
1Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002
2Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049
3Graduate School of Chinese Academy of Sciences, Beijing 100049
Phase Transition and EOS of Marmatite (Zn0.76Fe0.23S) up to 623K and 17GPa
1Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002
2Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049
3Graduate School of Chinese Academy of Sciences, Beijing 100049
Abstract： In situ energy dispersive x-ray diffraction for natural marmatite (Zn0.76Fe0.23S) is performed up to 17.7GPa and 623K. It is fitted by the Birch--Murnaghan equation of state (EOS) that K0 and α0 for marmatite are 85(3)GPa and 0.79(16)×10-4K-1, respectively. Fe2+ isomorphic replacing to Zn2+ in natural crystal is responsible for high bulk modulus and thermal expansivity of marmatite. Temperature derivative of bulk modulus (∂K/∂T)P for marmatite is fitted to be -0.044(23)GPaK-1. The unambiguous B3--B1 phase boundaries for marmatite are determined to be Pupper(GPa)=15.50-0.016 T(°C) and Plower (GPa)=9.94--0.012T(°C) at 300--623K.
JIANG Xi;ZHOU Wen-Ge;XIE Hong-Sen;LIU Yong-Gang;FAN Da-Wei;LIU Jing;LI Yan-Chun;LUO Chong-Ju;MA Mai-Ning. Phase Transition and EOS of Marmatite (Zn0.76Fe0.23S) up to 623K and 17GPa[J]. 中国物理快报, 2007, 24(1): 287-290.
JIANG Xi, ZHOU Wen-Ge, XIE Hong-Sen, LIU Yong-Gang, FAN Da-Wei, LIU Jing, LI Yan-Chun, LUO Chong-Ju, MA Mai-Ning. Phase Transition and EOS of Marmatite (Zn0.76Fe0.23S) up to 623K and 17GPa. Chin. Phys. Lett., 2007, 24(1): 287-290.
2007, Vol. 24 
