Synthesis and crystal structure study of Y2O3 high‐pressure polymorph

Single crystal high pressure polymorph of yttria was synthesized for the first time using a link–type cubic anvil apparatus. Crystal structure was refined from single crystal data. High pressure polymorph was confirmed as a monoclinic phase. Lattice parameters of the high pressure polymorph at room temperature and ambient pressure were determined as follows: a = 13.8714 Å, b = 3.4487 Å, c = 8.5862 Å, β = 100.12°.