Er(TiGa2)2 crystallizes in the tetragonal I4/mmm space group. Er(1) is bonded in a distorted square co-planar geometry to twelve Ga(1,1,1,1) atoms. Ti(1) is bonded in a 10-coordinate geometry to two equivalent Ti(1) and eight Ga(1,1,1,1) atoms. There are four inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 11-coordinate geometry to three equivalent Er(1); four equivalent Ti(1); and four Ga(1,1,1) atoms. In the second Ga site, Ga(1) is bonded in a 11-coordinate geometry to three equivalent Er(1); four equivalent Ti(1); and four Ga(1,1) atoms. In the third Ga site, Ga(1) is bonded in a 11-coordinate geometry to three equivalent Er(1); four equivalent Ti(1); and four Ga(1,1,1) atoms. In the fourth Ga site, Ga(1) is bonded in a 11-coordinate geometry to three equivalent Er(1); four equivalent Ti(1); and four Ga(1,1) atoms.
Er(TiGa2)2 crystallizes in the tetragonal I4/mmm space group. Er(1) is bonded in a distorted square co-planar geometry to twelve Ga(1,1,1,1) atoms. There are four shorter (2.87 Å) and eight longer (3.29 Å) Er(1)-Ga(1,1,1,1) bond lengths. Ti(1) is bonded in a 10-coordinate geometry to two equivalent Ti(1) and eight Ga(1,1,1,1) atoms. Both Ti(1)-Ti(1) bond lengths are 2.71 Å. All Ti(1)-Ga(1,1,1,1) bond lengths are 2.77 Å. There are four inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 11-coordinate geometry to three equivalent Er(1); four equivalent Ti(1); and four Ga(1,1,1) atoms. There are two shorter (2.64 Å) and two longer (2.89 Å) Ga(1)-Ga(1,1,1) bond lengths. In the second Ga site, Ga(1) is bonded in a 11-coordinate geometry to three equivalent Er(1); four equivalent Ti(1); and four Ga(1,1) atoms. The Ga(1)-Ga(1) bond length is 2.64 Å. In the third Ga site, Ga(1) is bonded in a 11-coordinate geometry to three equivalent Er(1); four equivalent Ti(1); and four Ga(1,1,1) atoms. There is one shorter (2.64 Å) and two longer (2.89 Å) Ga(1)-Ga(1,1) bond lengths. In the fourth Ga site, Ga(1) is bonded in a 11-coordinate geometry to three equivalent Er(1); four equivalent Ti(1); and four Ga(1,1) atoms.