Ba3Ge4 is Magnesium tetraboride-like structured and crystallizes in the orthorhombic Cmmm space group. There are five inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 8-coordinate geometry to two equivalent Ge(1), two equivalent Ge(2), two equivalent Ge(3), and two equivalent Ge(4) atoms. In the second Ba site, Ba(2) is bonded in a 8-coordinate geometry to two equivalent Ge(1), two equivalent Ge(2), and four equivalent Ge(4) atoms. In the third Ba site, Ba(3) is bonded in a 8-coordinate geometry to two equivalent Ge(1), two equivalent Ge(2), and four equivalent Ge(3) atoms. In the fourth Ba site, Ba(4) is bonded in a 8-coordinate geometry to four equivalent Ge(2) and four equivalent Ge(3) atoms. In the fifth Ba site, Ba(5) is bonded in a 8-coordinate geometry to four equivalent Ge(1) and four equivalent Ge(4) atoms. There are four inequivalent Ge sites. In the first Ge site, Ge(3) is bonded in a 9-coordinate geometry to two equivalent Ba(1), two equivalent Ba(3), two equivalent Ba(4), one Ge(3), and two equivalent Ge(2) atoms. In the second Ge site, Ge(4) is bonded in a 9-coordinate geometry to two equivalent Ba(1), two equivalent Ba(2), two equivalent Ba(5), one Ge(4), and two equivalent Ge(1) atoms. In the third Ge site, Ge(1) is bonded in a 8-coordinate geometry to one Ba(2), one Ba(3), two equivalent Ba(1), two equivalent Ba(5), and two equivalent Ge(4) atoms. In the fourth Ge site, Ge(2) is bonded in a 8-coordinate geometry to one Ba(2), one Ba(3), two equivalent Ba(1), two equivalent Ba(4), and two equivalent Ge(3) atoms.
Ba3Ge4 is Magnesium tetraboride-like structured and crystallizes in the orthorhombic Cmmm space group. There are five inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 8-coordinate geometry to two equivalent Ge(1), two equivalent Ge(2), two equivalent Ge(3), and two equivalent Ge(4) atoms. Both Ba(1)-Ge(1) bond lengths are 3.35 Å. Both Ba(1)-Ge(2) bond lengths are 3.34 Å. Both Ba(1)-Ge(3) bond lengths are 3.44 Å. Both Ba(1)-Ge(4) bond lengths are 3.55 Å. In the second Ba site, Ba(2) is bonded in a 8-coordinate geometry to two equivalent Ge(1), two equivalent Ge(2), and four equivalent Ge(4) atoms. Both Ba(2)-Ge(1) bond lengths are 3.60 Å. Both Ba(2)-Ge(2) bond lengths are 3.42 Å. All Ba(2)-Ge(4) bond lengths are 3.40 Å. In the third Ba site, Ba(3) is bonded in a 8-coordinate geometry to two equivalent Ge(1), two equivalent Ge(2), and four equivalent Ge(3) atoms. Both Ba(3)-Ge(1) bond lengths are 3.29 Å. Both Ba(3)-Ge(2) bond lengths are 3.63 Å. All Ba(3)-Ge(3) bond lengths are 3.58 Å. In the fourth Ba site, Ba(4) is bonded in a 8-coordinate geometry to four equivalent Ge(2) and four equivalent Ge(3) atoms. All Ba(4)-Ge(2) bond lengths are 3.61 Å. There are two shorter (3.44 Å) and two longer (3.68 Å) Ba(4)-Ge(3) bond lengths. In the fifth Ba site, Ba(5) is bonded in a 8-coordinate geometry to four equivalent Ge(1) and four equivalent Ge(4) atoms. All Ba(5)-Ge(1) bond lengths are 3.56 Å. There are two shorter (3.68 Å) and two longer (3.74 Å) Ba(5)-Ge(4) bond lengths. There are four inequivalent Ge sites. In the first Ge site, Ge(3) is bonded in a 9-coordinate geometry to two equivalent Ba(1), two equivalent Ba(3), two equivalent Ba(4), one Ge(3), and two equivalent Ge(2) atoms. The Ge(3)-Ge(3) bond length is 2.89 Å. Both Ge(3)-Ge(2) bond lengths are 2.60 Å. In the second Ge site, Ge(4) is bonded in a 9-coordinate geometry to two equivalent Ba(1), two equivalent Ba(2), two equivalent Ba(5), one Ge(4), and two equivalent Ge(1) atoms. The Ge(4)-Ge(4) bond length is 2.55 Å. Both Ge(4)-Ge(1) bond lengths are 2.57 Å. In the third Ge site, Ge(1) is bonded in a 8-coordinate geometry to one Ba(2), one Ba(3), two equivalent Ba(1), two equivalent Ba(5), and two equivalent Ge(4) atoms. In the fourth Ge site, Ge(2) is bonded in a 8-coordinate geometry to one Ba(2), one Ba(3), two equivalent Ba(1), two equivalent Ba(4), and two equivalent Ge(3) atoms.