Ca3Au7Ge4 crystallizes in the orthorhombic Pnnm space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 14-coordinate geometry to two equivalent Au(1), two equivalent Au(3), two equivalent Au(4), three equivalent Au(2), two equivalent Ge(2), and three equivalent Ge(1) atoms. In the second Ca site, Ca(2) is bonded in a 8-coordinate geometry to two equivalent Au(2), four equivalent Au(4), and two equivalent Ge(2) atoms. There are four inequivalent Au sites. In the first Au site, Au(1) is bonded in a 5-coordinate geometry to two equivalent Ca(1), two equivalent Au(2), two equivalent Au(3), one Ge(1), and two equivalent Ge(2) atoms. In the second Au site, Au(2) is bonded in a 10-coordinate geometry to one Ca(2), three equivalent Ca(1), one Au(3), one Au(4), two equivalent Au(1), and two equivalent Ge(1) atoms. In the third Au site, Au(3) is bonded to four equivalent Ca(1), two equivalent Au(2), four equivalent Au(1), and two equivalent Ge(2) atoms to form distorted face-sharing AuCa4Ge2Au6 cuboctahedra. In the fourth Au site, Au(4) is bonded in a 7-coordinate geometry to two equivalent Ca(1), two equivalent Ca(2), one Au(2), one Ge(1), and two equivalent Ge(2) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 3-coordinate geometry to three equivalent Ca(1), one Au(1), one Au(4), two equivalent Au(2), and one Ge(2) atom. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to one Ca(2), two equivalent Ca(1), one Au(3), two equivalent Au(1), two equivalent Au(4), and one Ge(1) atom.
Ca3Au7Ge4 crystallizes in the orthorhombic Pnnm space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 14-coordinate geometry to two equivalent Au(1), two equivalent Au(3), two equivalent Au(4), three equivalent Au(2), two equivalent Ge(2), and three equivalent Ge(1) atoms. There is one shorter (3.13 Å) and one longer (3.20 Å) Ca(1)-Au(1) bond length. Both Ca(1)-Au(3) bond lengths are 3.38 Å. Both Ca(1)-Au(4) bond lengths are 3.23 Å. There are two shorter (3.31 Å) and one longer (3.41 Å) Ca(1)-Au(2) bond length. Both Ca(1)-Ge(2) bond lengths are 3.26 Å. There are two shorter (3.18 Å) and one longer (3.41 Å) Ca(1)-Ge(1) bond length. In the second Ca site, Ca(2) is bonded in a 8-coordinate geometry to two equivalent Au(2), four equivalent Au(4), and two equivalent Ge(2) atoms. Both Ca(2)-Au(2) bond lengths are 3.13 Å. All Ca(2)-Au(4) bond lengths are 3.28 Å. Both Ca(2)-Ge(2) bond lengths are 3.15 Å. There are four inequivalent Au sites. In the first Au site, Au(1) is bonded in a 5-coordinate geometry to two equivalent Ca(1), two equivalent Au(2), two equivalent Au(3), one Ge(1), and two equivalent Ge(2) atoms. Both Au(1)-Au(2) bond lengths are 2.93 Å. Both Au(1)-Au(3) bond lengths are 2.97 Å. The Au(1)-Ge(1) bond length is 2.82 Å. Both Au(1)-Ge(2) bond lengths are 2.84 Å. In the second Au site, Au(2) is bonded in a 10-coordinate geometry to one Ca(2), three equivalent Ca(1), one Au(3), one Au(4), two equivalent Au(1), and two equivalent Ge(1) atoms. The Au(2)-Au(3) bond length is 2.98 Å. The Au(2)-Au(4) bond length is 2.96 Å. Both Au(2)-Ge(1) bond lengths are 2.58 Å. In the third Au site, Au(3) is bonded to four equivalent Ca(1), two equivalent Au(2), four equivalent Au(1), and two equivalent Ge(2) atoms to form distorted face-sharing AuCa4Ge2Au6 cuboctahedra. Both Au(3)-Ge(2) bond lengths are 2.74 Å. In the fourth Au site, Au(4) is bonded in a 7-coordinate geometry to two equivalent Ca(1), two equivalent Ca(2), one Au(2), one Ge(1), and two equivalent Ge(2) atoms. The Au(4)-Ge(1) bond length is 2.56 Å. Both Au(4)-Ge(2) bond lengths are 2.79 Å. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 3-coordinate geometry to three equivalent Ca(1), one Au(1), one Au(4), two equivalent Au(2), and one Ge(2) atom. The Ge(1)-Ge(2) bond length is 2.66 Å. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to one Ca(2), two equivalent Ca(1), one Au(3), two equivalent Au(1), two equivalent Au(4), and one Ge(1) atom.