Materials Data on MgMnGe by Materials Project
MgMnGe is Matlockite structured and crystallizes in the tetragonal P4/nmm space group. The structure is three-dimensional. Mg is bonded in a 5-coordinate geometry to four equivalent Mn and five equivalent Ge atoms. All Mg–Mn bond lengths are 2.92 Å. There are one shorter (2.82 Å) and four longer (2.83 Å) Mg–Ge bond lengths. Mn is bonded to four equivalent Mg and four equivalent Ge atoms to form a mixture of distorted edge and face-sharing MnMg4Ge4 tetrahedra. All Mn–Ge bond lengths are 2.50 Å. Ge is bonded in a 9-coordinate geometry to five equivalent Mg and four equivalent Mn atoms.
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