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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Ce(MnGe)2 by Materials Project

CeMn2Ge2 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Ce is bonded in a 8-coordinate geometry to eight equivalent Mn and eight equivalent Ge atoms. All Ce–Mn bond lengths are 3.36 Å. All Ce–Ge bond lengths are 3.11 Å. Mn is bonded to four equivalent Ce and four equivalent Ge atoms to form a mixture of face, edge, and corner-sharing MnCe4Ge4 tetrahedra. All Mn–Ge bond lengths are 2.44 Å. Ge is bonded in a 9-coordinate geometry to four equivalent Ce, four equivalent Mn, and one Ge atom. The Ge–Ge bond length is 2.62 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CeMnGe by Materials Project

CeMnGe is Matlockite structured and crystallizes in the tetragonal P4/nmm space group. The structure is three-dimensional. Ce is bonded in a 5-coordinate geometry to four equivalent Mn and five equivalent Ge atoms. All Ce–Mn bond lengths are 3.13 Å. There are four shorter (3.01 Å) and one longer (3.38 Å) Ce–Ge bond lengths. Mn is bonded to four equivalent Ce and four equivalent Ge atoms to form a mixture of distorted edge and face-sharing MnCe4Ge4 tetrahedra. All Mn–Ge bond lengths are 2.50 Å. Ge is bonded in a 9-coordinate geometry to five equivalent Ce and four equivalent Mn atoms.

36 MATERIALS SCIENCE↗