Structural Study of solid Hydrogen Sulfide under High Pressure
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An x-ray powder diffraction experiment on solid H<SUB>2</SUB>S was performed with a diamond anvil cell and an image plate to determine the unknown structures of phases I' and IV up to 25 GPa at room temperature. The structures of phases I' and IV were found to be cubic T<SUP>4</SUP> - P2<SUB>1</SUB>3 and tetragonal D<SUP>20</SUP><SUB>4h</SUB> -I4<SUB>1</SUB>/acd, respectively. In phase I', the H<SUB>2</SUB>S molecule had 6-fold asymmetric coordination which brought a displacement from face-center. In phase IV, the molecules were found to form spiral chains along the c axis with partial loss of molecularity. The chains were linked by hydrogen bonds.
- The Review of High Pressure Science and Technology
The Review of High Pressure Science and Technology 7, 790-792, 1998
The Japan Society of High Pressure Science and Technology