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DOE OSTI · 1724713

Materials Data on Pm2MgSe4 by Materials Project

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Abstract

MgPm2Se4 is Spinel structured and crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. Mg2+ is bonded to four equivalent Se2- atoms to form MgSe4 tetrahedra that share corners with twelve equivalent PmSe6 octahedra. The corner-sharing octahedral tilt angles are 56°. All Mg–Se bond lengths are 2.65 Å. Pm3+ is bonded to six equivalent Se2- atoms to form PmSe6 octahedra that share corners with six equivalent MgSe4 tetrahedra and edges with six equivalent PmSe6 octahedra. All Pm–Se bond lengths are 2.95 Å. Se2- is bonded in a distorted rectangular see-saw-like geometry to one Mg2+ and three equivalent Pm3+ atoms.

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36 MATERIALS SCIENCEcrystal structureMg-Pm-SePm2MgSe4

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2020-04-30. Materials Data on Pm2MgSe4 by Materials Project. https://doi.org/10.17188/1724713

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