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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on MnBe12 by Materials Project

Be12Mn crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are three inequivalent Be sites. In the first Be site, Be is bonded in a 10-coordinate geometry to ten Be and two equivalent Mn atoms. There are a spread of Be–Be bond distances ranging from 2.05–2.17 Å. Both Be–Mn bond lengths are 2.73 Å. In the second Be site, Be is bonded in a 12-coordinate geometry to ten Be and two equivalent Mn atoms. There are a spread of Be–Be bond distances ranging from 2.12–2.35 Å. Both Be–Mn bond lengths are 2.54 Å. In the third Be site, Be is bonded in a 10-coordinate geometry to thirteen Be and one Mn atom. There are one shorter (2.20 Å) and four longer (2.57 Å) Be–Be bond lengths. The Be–Mn bond length is 2.48 Å. Mn is bonded in a 12-coordinate geometry to twenty Be atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on MnBe3 by Materials Project

Be3Mn is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Be is bonded to eight equivalent Be and four equivalent Mn atoms to form BeMn4Be8 cuboctahedra that share corners with twelve equivalent BeMn4Be8 cuboctahedra, edges with eight equivalent MnBe12 cuboctahedra, edges with sixteen equivalent BeMn4Be8 cuboctahedra, faces with four equivalent MnBe12 cuboctahedra, and faces with fourteen equivalent BeMn4Be8 cuboctahedra. All Be–Be bond lengths are 2.30 Å. All Be–Mn bond lengths are 2.30 Å. Mn is bonded to twelve equivalent Be atoms to form MnBe12 cuboctahedra that share corners with twelve equivalent MnBe12 cuboctahedra, edges with twenty-four equivalent BeMn4Be8 cuboctahedra, faces with six equivalent MnBe12 cuboctahedra, and faces with twelve equivalent BeMn4Be8 cuboctahedra.

36 MATERIALS SCIENCE↗