https://www.selleckchem.com/pr....oducts/3,4-dichlorop
The layered crystal of EuSn_2As_2 has a Bi_2Te_3-type structure in rhombohedral (R3[over ¯]m) symmetry and has been confirmed to be an intrinsic magnetic topological insulator at ambient conditions. Combining ab initio calculations and in situ x-ray diffraction measurements, we identify a new monoclinic EuSn_2As_2 structure in C2/m symmetry above ∼14 GPa. It has a three-dimensional network made up of honeycomblike Sn sheets and zigzag As chains, transformed from the layered EuSn_2As_2 via a two-stage reconstru
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