Ba2Zn(BO2)6 crystallizes in the triclinic P-1 space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 9-coordinate geometry to one O(10), one O(11), one O(7), two equivalent O(5), two equivalent O(6), and two equivalent O(8) atoms. In the second Ba site, Ba(2) is bonded in a 9-coordinate geometry to one O(1), one O(12), one O(2), one O(3), one O(4), one O(5), one O(6), one O(8), and one O(9) atom. Zn(1) is bonded to one O(12), one O(9), and two equivalent O(1) atoms to form edge-sharing ZnO4 tetrahedra. There are six inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to one O(3), one O(4), and one O(9) atom. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(10), one O(11), and one O(5) atom. In the third B site, B(3) is bonded in a trigonal planar geometry to one O(12), one O(2), and one O(3) atom. In the fourth B site, B(4) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(4) atom. In the fifth B site, B(5) is bonded in a trigonal planar geometry to one O(10), one O(6), and one O(7) atom. In the sixth B site, B(6) is bonded in a trigonal planar geometry to one O(11), one O(7), and one O(8) atom. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Ba(2), two equivalent Zn(1), and one B(4) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Ba(2), one B(3), and one B(4) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Ba(2), one B(1), and one B(3) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Ba(2), one B(1), and one B(4) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Ba(2), two equivalent Ba(1), and one B(2) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one Ba(2), two equivalent Ba(1), and one B(5) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Ba(1), one B(5), and one B(6) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Ba(2), two equivalent Ba(1), and one B(6) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one Ba(2), one Zn(1), and one B(1) atom. In the tenth O site, O(10) is bonded in a bent 120 degrees geometry to one Ba(1), one B(2), and one B(5) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one Ba(1), one B(2), and one B(6) atom. In the twelfth O site, O(12) is bonded in a 2-coordinate geometry to one Ba(2), one Zn(1), and one B(3) atom.
Ba2Zn(BO2)6 crystallizes in the triclinic P-1 space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 9-coordinate geometry to one O(10), one O(11), one O(7), two equivalent O(5), two equivalent O(6), and two equivalent O(8) atoms. The Ba(1)-O(10) bond length is 3.07 Å. The Ba(1)-O(11) bond length is 3.05 Å. The Ba(1)-O(7) bond length is 3.13 Å. There is one shorter (2.77 Å) and one longer (2.84 Å) Ba(1)-O(5) bond length. There is one shorter (2.80 Å) and one longer (2.85 Å) Ba(1)-O(6) bond length. There is one shorter (2.84 Å) and one longer (2.85 Å) Ba(1)-O(8) bond length. In the second Ba site, Ba(2) is bonded in a 9-coordinate geometry to one O(1), one O(12), one O(2), one O(3), one O(4), one O(5), one O(6), one O(8), and one O(9) atom. The Ba(2)-O(1) bond length is 3.12 Å. The Ba(2)-O(12) bond length is 2.90 Å. The Ba(2)-O(2) bond length is 3.07 Å. The Ba(2)-O(3) bond length is 3.06 Å. The Ba(2)-O(4) bond length is 3.15 Å. The Ba(2)-O(5) bond length is 2.72 Å. The Ba(2)-O(6) bond length is 2.73 Å. The Ba(2)-O(8) bond length is 2.71 Å. The Ba(2)-O(9) bond length is 2.90 Å. Zn(1) is bonded to one O(12), one O(9), and two equivalent O(1) atoms to form edge-sharing ZnO4 tetrahedra. The Zn(1)-O(12) bond length is 1.94 Å. The Zn(1)-O(9) bond length is 1.91 Å. There is one shorter (1.99 Å) and one longer (2.17 Å) Zn(1)-O(1) bond length. There are six inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to one O(3), one O(4), and one O(9) atom. The B(1)-O(3) bond length is 1.41 Å. The B(1)-O(4) bond length is 1.40 Å. The B(1)-O(9) bond length is 1.34 Å. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(10), one O(11), and one O(5) atom. The B(2)-O(10) bond length is 1.41 Å. The B(2)-O(11) bond length is 1.42 Å. The B(2)-O(5) bond length is 1.33 Å. In the third B site, B(3) is bonded in a trigonal planar geometry to one O(12), one O(2), and one O(3) atom. The B(3)-O(12) bond length is 1.34 Å. The B(3)-O(2) bond length is 1.42 Å. The B(3)-O(3) bond length is 1.40 Å. In the fourth B site, B(4) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(4) atom. The B(4)-O(1) bond length is 1.36 Å. The B(4)-O(2) bond length is 1.39 Å. The B(4)-O(4) bond length is 1.40 Å. In the fifth B site, B(5) is bonded in a trigonal planar geometry to one O(10), one O(6), and one O(7) atom. The B(5)-O(10) bond length is 1.42 Å. The B(5)-O(6) bond length is 1.33 Å. The B(5)-O(7) bond length is 1.41 Å. In the sixth B site, B(6) is bonded in a trigonal planar geometry to one O(11), one O(7), and one O(8) atom. The B(6)-O(11) bond length is 1.41 Å. The B(6)-O(7) bond length is 1.42 Å. The B(6)-O(8) bond length is 1.33 Å. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Ba(2), two equivalent Zn(1), and one B(4) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Ba(2), one B(3), and one B(4) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Ba(2), one B(1), and one B(3) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Ba(2), one B(1), and one B(4) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Ba(2), two equivalent Ba(1), and one B(2) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one Ba(2), two equivalent Ba(1), and one B(5) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Ba(1), one B(5), and one B(6) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Ba(2), two equivalent Ba(1), and one B(6) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one Ba(2), one Zn(1), and one B(1) atom. In the tenth O site, O(10) is bonded in a bent 120 degrees geometry to one Ba(1), one B(2), and one B(5) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one Ba(1), one B(2), and one B(6) atom. In the twelfth O site, O(12) is bonded in a 2-coordinate geometry to one Ba(2), one Zn(1), and one B(3) atom.