TbMnSi is Matlockite structured and crystallizes in the tetragonal P4/nmm space group. Tb(1) is bonded in a 9-coordinate geometry to four equivalent Mn(1) and five equivalent Si(1) atoms. Mn(1) is bonded to four equivalent Tb(1) and four equivalent Si(1) atoms to form a mixture of distorted edge and face-sharing MnTb4Si4 tetrahedra. Si(1) is bonded in a 9-coordinate geometry to five equivalent Tb(1) and four equivalent Mn(1) atoms.
TbMnSi is Matlockite structured and crystallizes in the tetragonal P4/nmm space group. Tb(1) is bonded in a 9-coordinate geometry to four equivalent Mn(1) and five equivalent Si(1) atoms. All Tb(1)-Mn(1) bond lengths are 3.13 Å. There are four shorter (2.93 Å) and one longer (3.38 Å) Tb(1)-Si(1) bond length. Mn(1) is bonded to four equivalent Tb(1) and four equivalent Si(1) atoms to form a mixture of distorted edge and face-sharing MnTb4Si4 tetrahedra. All Mn(1)-Si(1) bond lengths are 2.45 Å. Si(1) is bonded in a 9-coordinate geometry to five equivalent Tb(1) and four equivalent Mn(1) atoms.