CaPtGa3 crystallizes in the tetragonal I4mm space group. Ca(1) is bonded in a 16-coordinate geometry to four equivalent Pt(1), four equivalent Ga(2), and eight equivalent Ga(1) atoms. Pt(1) is bonded in a 9-coordinate geometry to four equivalent Ca(1), one Ga(2), and four equivalent Ga(1) atoms. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a distorted bent 120 degrees geometry to four equivalent Ca(1), two equivalent Pt(1), and two equivalent Ga(2) atoms. In the second Ga site, Ga(2) is bonded in a distorted single-bond geometry to four equivalent Ca(1), one Pt(1), and four equivalent Ga(1) atoms.
CaPtGa3 crystallizes in the tetragonal I4mm space group. Ca(1) is bonded in a 16-coordinate geometry to four equivalent Pt(1), four equivalent Ga(2), and eight equivalent Ga(1) atoms. All Ca(1)-Pt(1) bond lengths are 3.26 Å. All Ca(1)-Ga(2) bond lengths are 3.20 Å. There are four shorter (3.42 Å) and four longer (3.45 Å) Ca(1)-Ga(1) bond lengths. Pt(1) is bonded in a 9-coordinate geometry to four equivalent Ca(1), one Ga(2), and four equivalent Ga(1) atoms. The Pt(1)-Ga(2) bond length is 2.46 Å. All Pt(1)-Ga(1) bond lengths are 2.52 Å. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a distorted bent 120 degrees geometry to four equivalent Ca(1), two equivalent Pt(1), and two equivalent Ga(2) atoms. Both Ga(1)-Ga(2) bond lengths are 2.64 Å. In the second Ga site, Ga(2) is bonded in a distorted single-bond geometry to four equivalent Ca(1), one Pt(1), and four equivalent Ga(1) atoms.