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Figure 3
Pressure dependence of lattice parameters a and c, and atomic volume V from 90 to 210 GPa. The open symbols represent experimental data in this work, the solid symbols represent the calculated lattice constants a and c, and the c/a ratio, respectively. The b.c.c. structure remains stable up to 210 GPa, no new phase transition was observed from 140 to 210 GPa. The phases Se-V′ and Se-VI coexist from 140 to 160 GPa.

IUCrJ
Volume 9| Part 2| March 2022| Pages 253-260
ISSN: 2052-2525
https://doi.org/10.1107/S2052252522000252