KCr3BiO12 crystallizes in the triclinic P-1 space group. K(1) is bonded in a 8-coordinate geometry to one O(1), one O(11), one O(12), one O(3), one O(5), one O(9), and two equivalent O(10) atoms. There are three inequivalent Cr sites. In the first Cr site, Cr(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. In the second Cr site, Cr(2) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form corner-sharing CrO4 tetrahedra. In the third Cr site, Cr(3) is bonded to one O(10), one O(11), one O(8), and one O(9) atom to form corner-sharing CrO4 tetrahedra. Bi(1) is bonded in a 8-coordinate geometry to one O(12), one O(3), one O(4), one O(5), one O(7), one O(9), and two equivalent O(2) atoms. There are twelve inequivalent O sites. In the first O site, O(12) is bonded in a bent 120 degrees geometry to one K(1) and one Bi(1) atom. In the second O site, O(1) is bonded in a distorted single-bond geometry to one K(1) and one Cr(1) atom. In the third O site, O(2) is bonded in a distorted single-bond geometry to one Cr(1) and two equivalent Bi(1) atoms. In the fourth O site, O(3) is bonded in a 2-coordinate geometry to one K(1), one Cr(1), and one Bi(1) atom. In the fifth O site, O(4) is bonded in a distorted linear geometry to one Cr(1) and one Bi(1) atom. In the sixth O site, O(5) is bonded in a distorted single-bond geometry to one K(1), one Cr(2), and one Bi(1) atom. In the seventh O site, O(6) is bonded in a single-bond geometry to one Cr(2) atom. In the eighth O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Cr(2) and one Bi(1) atom. In the ninth O site, O(8) is bonded in a bent 120 degrees geometry to one Cr(2) and one Cr(3) atom. In the tenth O site, O(9) is bonded in a distorted single-bond geometry to one K(1), one Cr(3), and one Bi(1) atom. In the eleventh O site, O(10) is bonded in a distorted single-bond geometry to two equivalent K(1) and one Cr(3) atom. In the twelfth O site, O(11) is bonded in a single-bond geometry to one K(1) and one Cr(3) atom.
KCr3BiO12 crystallizes in the triclinic P-1 space group. K(1) is bonded in a 8-coordinate geometry to one O(1), one O(11), one O(12), one O(3), one O(5), one O(9), and two equivalent O(10) atoms. The K(1)-O(1) bond length is 2.83 Å. The K(1)-O(11) bond length is 2.98 Å. The K(1)-O(12) bond length is 3.07 Å. The K(1)-O(3) bond length is 3.29 Å. The K(1)-O(5) bond length is 2.82 Å. The K(1)-O(9) bond length is 3.20 Å. There is one shorter (2.80 Å) and one longer (2.84 Å) K(1)-O(10) bond length. There are three inequivalent Cr sites. In the first Cr site, Cr(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. The Cr(1)-O(1) bond length is 1.61 Å. The Cr(1)-O(2) bond length is 1.71 Å. The Cr(1)-O(3) bond length is 1.71 Å. The Cr(1)-O(4) bond length is 1.67 Å. In the second Cr site, Cr(2) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form corner-sharing CrO4 tetrahedra. The Cr(2)-O(5) bond length is 1.66 Å. The Cr(2)-O(6) bond length is 1.60 Å. The Cr(2)-O(7) bond length is 1.66 Å. The Cr(2)-O(8) bond length is 1.79 Å. In the third Cr site, Cr(3) is bonded to one O(10), one O(11), one O(8), and one O(9) atom to form corner-sharing CrO4 tetrahedra. The Cr(3)-O(10) bond length is 1.62 Å. The Cr(3)-O(11) bond length is 1.61 Å. The Cr(3)-O(8) bond length is 1.78 Å. The Cr(3)-O(9) bond length is 1.70 Å. Bi(1) is bonded in a 8-coordinate geometry to one O(12), one O(3), one O(4), one O(5), one O(7), one O(9), and two equivalent O(2) atoms. The Bi(1)-O(12) bond length is 2.43 Å. The Bi(1)-O(3) bond length is 2.30 Å. The Bi(1)-O(4) bond length is 2.36 Å. The Bi(1)-O(5) bond length is 2.50 Å. The Bi(1)-O(7) bond length is 2.42 Å. The Bi(1)-O(9) bond length is 2.47 Å. There is one shorter (2.53 Å) and one longer (2.60 Å) Bi(1)-O(2) bond length. There are twelve inequivalent O sites. In the first O site, O(12) is bonded in a bent 120 degrees geometry to one K(1) and one Bi(1) atom. In the second O site, O(1) is bonded in a distorted single-bond geometry to one K(1) and one Cr(1) atom. In the third O site, O(2) is bonded in a distorted single-bond geometry to one Cr(1) and two equivalent Bi(1) atoms. In the fourth O site, O(3) is bonded in a 2-coordinate geometry to one K(1), one Cr(1), and one Bi(1) atom. In the fifth O site, O(4) is bonded in a distorted linear geometry to one Cr(1) and one Bi(1) atom. In the sixth O site, O(5) is bonded in a distorted single-bond geometry to one K(1), one Cr(2), and one Bi(1) atom. In the seventh O site, O(6) is bonded in a single-bond geometry to one Cr(2) atom. In the eighth O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Cr(2) and one Bi(1) atom. In the ninth O site, O(8) is bonded in a bent 120 degrees geometry to one Cr(2) and one Cr(3) atom. In the tenth O site, O(9) is bonded in a distorted single-bond geometry to one K(1), one Cr(3), and one Bi(1) atom. In the eleventh O site, O(10) is bonded in a distorted single-bond geometry to two equivalent K(1) and one Cr(3) atom. In the twelfth O site, O(11) is bonded in a single-bond geometry to one K(1) and one Cr(3) atom.