Evidence of polymorphic transformations of Sn under high pressure
Jing Qiu-Min1, †, , Cao Yu-Hong2, Zhang Yi1, ‡, , Li Shou-Rui1, He Qiang1, Hou Qi-Yue1, Liu Sheng-Gang1, Liu Lei1, Bi Yan1, Geng Hua-Yun1, Wu Qiang1
       

Refinement of the x-ray diffraction pattern at 12.8 GPa by GSAS. The vertical thick lines mark the locations of the diffraction peaks from bct-Sn and the vertical thin lines show those from the rhenium gasket. The bottom curve is the difference taken from the actual spectra minus the structural refinement.