Ba4CuZn2Ge20 crystallizes in the orthorhombic Ama2 space group. There are four inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 20-coordinate geometry to one Ge(10), one Ge(11), one Ge(12), one Ge(7), two equivalent Ge(1), two equivalent Ge(2), two equivalent Ge(3), two equivalent Ge(4), two equivalent Ge(5), two equivalent Ge(6), two equivalent Ge(8), and two equivalent Ge(9) atoms. In the second Ba site, Ba(2) is bonded in a 8-coordinate geometry to two equivalent Ge(5), two equivalent Ge(6), two equivalent Ge(8), and two equivalent Ge(9) atoms. In the third Ba site, Ba(3) is bonded in a 8-coordinate geometry to two equivalent Ge(10), two equivalent Ge(11), two equivalent Ge(12), and two equivalent Ge(7) atoms. In the fourth Ba site, Ba(4) is bonded in a 8-coordinate geometry to two equivalent Ge(5), two equivalent Ge(6), two equivalent Ge(8), and two equivalent Ge(9) atoms. Cu(1) is bonded in a tetrahedral geometry to one Ge(11), one Ge(7), and two equivalent Ge(5) atoms. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a tetrahedral geometry to two equivalent Ge(6) and two equivalent Ge(9) atoms. In the second Zn site, Zn(2) is bonded in a tetrahedral geometry to one Ge(10), one Ge(12), and two equivalent Ge(8) atoms. There are twelve inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 5-coordinate geometry to one Ba(1), one Ge(1), one Ge(5), one Ge(6), and one Ge(7) atom. In the second Ge site, Ge(2) is bonded in a 5-coordinate geometry to one Ba(1), one Ge(10), one Ge(2), one Ge(8), and one Ge(9) atom. In the third Ge site, Ge(3) is bonded in a 5-coordinate geometry to one Ba(1), one Ge(11), one Ge(4), one Ge(6), and one Ge(8) atom. In the fourth Ge site, Ge(4) is bonded in a 5-coordinate geometry to one Ba(1), one Ge(12), one Ge(3), one Ge(5), and one Ge(9) atom. In the fifth Ge site, Ge(5) is bonded in a 1-coordinate geometry to one Ba(1), one Ba(2), one Ba(4), one Cu(1), one Ge(1), and one Ge(4) atom. In the sixth Ge site, Ge(6) is bonded in a 1-coordinate geometry to one Ba(1), one Ba(2), one Ba(4), one Zn(1), one Ge(1), and one Ge(3) atom. In the seventh Ge site, Ge(7) is bonded in a 1-coordinate geometry to one Ba(1), two equivalent Ba(3), one Cu(1), and two equivalent Ge(1) atoms. In the eighth Ge site, Ge(8) is bonded in a 1-coordinate geometry to one Ba(1), one Ba(2), one Ba(4), one Zn(2), one Ge(2), and one Ge(3) atom. In the ninth Ge site, Ge(9) is bonded in a 1-coordinate geometry to one Ba(1), one Ba(2), one Ba(4), one Zn(1), one Ge(2), and one Ge(4) atom. In the tenth Ge site, Ge(10) is bonded in a 1-coordinate geometry to one Ba(1), two equivalent Ba(3), one Zn(2), and two equivalent Ge(2) atoms. In the eleventh Ge site, Ge(11) is bonded in a 1-coordinate geometry to one Ba(1), two equivalent Ba(3), one Cu(1), and two equivalent Ge(3) atoms. In the twelfth Ge site, Ge(12) is bonded in a 1-coordinate geometry to one Ba(1), two equivalent Ba(3), one Zn(2), and two equivalent Ge(4) atoms.
Ba4CuZn2Ge20 crystallizes in the orthorhombic Ama2 space group. There are four inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 20-coordinate geometry to one Ge(10), one Ge(11), one Ge(12), one Ge(7), two equivalent Ge(1), two equivalent Ge(2), two equivalent Ge(3), two equivalent Ge(4), two equivalent Ge(5), two equivalent Ge(6), two equivalent Ge(8), and two equivalent Ge(9) atoms. The Ba(1)-Ge(10) bond length is 3.61 Å. The Ba(1)-Ge(11) bond length is 3.69 Å. The Ba(1)-Ge(12) bond length is 3.60 Å. The Ba(1)-Ge(7) bond length is 3.67 Å. Both Ba(1)-Ge(1) bond lengths are 3.45 Å. Both Ba(1)-Ge(2) bond lengths are 3.46 Å. Both Ba(1)-Ge(3) bond lengths are 3.46 Å. Both Ba(1)-Ge(4) bond lengths are 3.46 Å. Both Ba(1)-Ge(5) bond lengths are 3.68 Å. Both Ba(1)-Ge(6) bond lengths are 3.61 Å. Both Ba(1)-Ge(8) bond lengths are 3.61 Å. Both Ba(1)-Ge(9) bond lengths are 3.62 Å. In the second Ba site, Ba(2) is bonded in a 8-coordinate geometry to two equivalent Ge(5), two equivalent Ge(6), two equivalent Ge(8), and two equivalent Ge(9) atoms. Both Ba(2)-Ge(5) bond lengths are 3.60 Å. Both Ba(2)-Ge(6) bond lengths are 3.65 Å. Both Ba(2)-Ge(8) bond lengths are 3.63 Å. Both Ba(2)-Ge(9) bond lengths are 3.67 Å. In the third Ba site, Ba(3) is bonded in a 8-coordinate geometry to two equivalent Ge(10), two equivalent Ge(11), two equivalent Ge(12), and two equivalent Ge(7) atoms. Both Ba(3)-Ge(10) bond lengths are 3.66 Å. Both Ba(3)-Ge(11) bond lengths are 3.62 Å. Both Ba(3)-Ge(12) bond lengths are 3.64 Å. Both Ba(3)-Ge(7) bond lengths are 3.61 Å. In the fourth Ba site, Ba(4) is bonded in a 8-coordinate geometry to two equivalent Ge(5), two equivalent Ge(6), two equivalent Ge(8), and two equivalent Ge(9) atoms. Both Ba(4)-Ge(5) bond lengths are 3.60 Å. Both Ba(4)-Ge(6) bond lengths are 3.65 Å. Both Ba(4)-Ge(8) bond lengths are 3.63 Å. Both Ba(4)-Ge(9) bond lengths are 3.66 Å. Cu(1) is bonded in a tetrahedral geometry to one Ge(11), one Ge(7), and two equivalent Ge(5) atoms. The Cu(1)-Ge(11) bond length is 2.44 Å. The Cu(1)-Ge(7) bond length is 2.44 Å. Both Cu(1)-Ge(5) bond lengths are 2.44 Å. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a tetrahedral geometry to two equivalent Ge(6) and two equivalent Ge(9) atoms. Both Zn(1)-Ge(6) bond lengths are 2.51 Å. Both Zn(1)-Ge(9) bond lengths are 2.51 Å. In the second Zn site, Zn(2) is bonded in a tetrahedral geometry to one Ge(10), one Ge(12), and two equivalent Ge(8) atoms. The Zn(2)-Ge(10) bond length is 2.52 Å. The Zn(2)-Ge(12) bond length is 2.52 Å. Both Zn(2)-Ge(8) bond lengths are 2.52 Å. There are twelve inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 5-coordinate geometry to one Ba(1), one Ge(1), one Ge(5), one Ge(6), and one Ge(7) atom. The Ge(1)-Ge(1) bond length is 2.51 Å. The Ge(1)-Ge(5) bond length is 2.55 Å. The Ge(1)-Ge(6) bond length is 2.53 Å. The Ge(1)-Ge(7) bond length is 2.55 Å. In the second Ge site, Ge(2) is bonded in a 5-coordinate geometry to one Ba(1), one Ge(10), one Ge(2), one Ge(8), and one Ge(9) atom. The Ge(2)-Ge(10) bond length is 2.53 Å. The Ge(2)-Ge(2) bond length is 2.50 Å. The Ge(2)-Ge(8) bond length is 2.53 Å. The Ge(2)-Ge(9) bond length is 2.53 Å. In the third Ge site, Ge(3) is bonded in a 5-coordinate geometry to one Ba(1), one Ge(11), one Ge(4), one Ge(6), and one Ge(8) atom. The Ge(3)-Ge(11) bond length is 2.55 Å. The Ge(3)-Ge(4) bond length is 2.50 Å. The Ge(3)-Ge(6) bond length is 2.53 Å. The Ge(3)-Ge(8) bond length is 2.53 Å. In the fourth Ge site, Ge(4) is bonded in a 5-coordinate geometry to one Ba(1), one Ge(12), one Ge(3), one Ge(5), and one Ge(9) atom. The Ge(4)-Ge(12) bond length is 2.54 Å. The Ge(4)-Ge(5) bond length is 2.55 Å. The Ge(4)-Ge(9) bond length is 2.53 Å. In the fifth Ge site, Ge(5) is bonded in a 1-coordinate geometry to one Ba(1), one Ba(2), one Ba(4), one Cu(1), one Ge(1), and one Ge(4) atom. In the sixth Ge site, Ge(6) is bonded in a 1-coordinate geometry to one Ba(1), one Ba(2), one Ba(4), one Zn(1), one Ge(1), and one Ge(3) atom. In the seventh Ge site, Ge(7) is bonded in a 1-coordinate geometry to one Ba(1), two equivalent Ba(3), one Cu(1), and two equivalent Ge(1) atoms. In the eighth Ge site, Ge(8) is bonded in a 1-coordinate geometry to one Ba(1), one Ba(2), one Ba(4), one Zn(2), one Ge(2), and one Ge(3) atom. In the ninth Ge site, Ge(9) is bonded in a 1-coordinate geometry to one Ba(1), one Ba(2), one Ba(4), one Zn(1), one Ge(2), and one Ge(4) atom. In the tenth Ge site, Ge(10) is bonded in a 1-coordinate geometry to one Ba(1), two equivalent Ba(3), one Zn(2), and two equivalent Ge(2) atoms. In the eleventh Ge site, Ge(11) is bonded in a 1-coordinate geometry to one Ba(1), two equivalent Ba(3), one Cu(1), and two equivalent Ge(3) atoms. In the twelfth Ge site, Ge(12) is bonded in a 1-coordinate geometry to one Ba(1), two equivalent Ba(3), one Zn(2), and two equivalent Ge(4) atoms.