TaMnSi crystallizes in the orthorhombic Ima2 space group. There are three inequivalent Ta sites. In the first Ta site, Ta(1) is bonded in a 11-coordinate geometry to two equivalent Mn(2), four equivalent Mn(1), one Si(2), and four equivalent Si(1) atoms. In the second Ta site, Ta(2) is bonded in a 5-coordinate geometry to one Si(2) and four equivalent Si(1) atoms. In the third Ta site, Ta(3) is bonded in a 5-coordinate geometry to one Si(2) and four equivalent Si(1) atoms. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a 4-coordinate geometry to two equivalent Ta(1), two equivalent Si(1), and two equivalent Si(2) atoms. In the second Mn site, Mn(2) is bonded in a 4-coordinate geometry to two equivalent Ta(1), two equivalent Si(1), and two equivalent Si(2) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to two equivalent Ta(1), two equivalent Ta(2), two equivalent Ta(3), one Mn(2), and two equivalent Mn(1) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to one Ta(1), one Ta(2), one Ta(3), two equivalent Mn(2), and four equivalent Mn(1) atoms.
TaMnSi crystallizes in the orthorhombic Ima2 space group. There are three inequivalent Ta sites. In the first Ta site, Ta(1) is bonded in a 11-coordinate geometry to two equivalent Mn(2), four equivalent Mn(1), one Si(2), and four equivalent Si(1) atoms. Both Ta(1)-Mn(2) bond lengths are 2.81 Å. There are two shorter (2.72 Å) and two longer (2.74 Å) Ta(1)-Mn(1) bond lengths. The Ta(1)-Si(2) bond length is 2.78 Å. There are two shorter (2.60 Å) and two longer (2.61 Å) Ta(1)-Si(1) bond lengths. In the second Ta site, Ta(2) is bonded in a 5-coordinate geometry to one Si(2) and four equivalent Si(1) atoms. The Ta(2)-Si(2) bond length is 2.60 Å. There are two shorter (2.60 Å) and two longer (2.61 Å) Ta(2)-Si(1) bond lengths. In the third Ta site, Ta(3) is bonded in a 5-coordinate geometry to one Si(2) and four equivalent Si(1) atoms. The Ta(3)-Si(2) bond length is 2.63 Å. There are two shorter (2.59 Å) and two longer (2.62 Å) Ta(3)-Si(1) bond lengths. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a 4-coordinate geometry to two equivalent Ta(1), two equivalent Si(1), and two equivalent Si(2) atoms. Both Mn(1)-Si(1) bond lengths are 2.45 Å. There is one shorter (2.36 Å) and one longer (2.38 Å) Mn(1)-Si(2) bond length. In the second Mn site, Mn(2) is bonded in a 4-coordinate geometry to two equivalent Ta(1), two equivalent Si(1), and two equivalent Si(2) atoms. Both Mn(2)-Si(1) bond lengths are 2.47 Å. Both Mn(2)-Si(2) bond lengths are 2.40 Å. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to two equivalent Ta(1), two equivalent Ta(2), two equivalent Ta(3), one Mn(2), and two equivalent Mn(1) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to one Ta(1), one Ta(2), one Ta(3), two equivalent Mn(2), and four equivalent Mn(1) atoms.