K2SrVB5O12 crystallizes in the monoclinic P2_1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 8-coordinate geometry to one O(11), one O(3), one O(4), one O(5), one O(6), one O(9), and two equivalent O(8) atoms. In the second K site, K(2) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(11), one O(4), one O(6), one O(7), and one O(8) atom. Sr(1) is bonded in a 9-coordinate geometry to one O(10), one O(12), one O(5), one O(7), one O(9), two equivalent O(1), and two equivalent O(2) atoms. V(1) is bonded in a tetrahedral geometry to one O(1), one O(4), one O(5), and one O(8) atom. There are five inequivalent B sites. In the first B site, B(1) is bonded to one O(2), one O(6), one O(7), and one O(9) atom to form corner-sharing BO4 tetrahedra. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(10), one O(12), and one O(9) atom. In the third B site, B(3) is bonded to one O(10), one O(11), one O(12), and one O(7) atom to form corner-sharing BO4 tetrahedra. In the fourth B site, B(4) is bonded in a trigonal planar geometry to one O(11), one O(2), and one O(3) atom. In the fifth B site, B(5) is bonded in a trigonal planar geometry to one O(3), one O(4), and one O(6) atom. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one K(2), two equivalent Sr(1), and one V(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to two equivalent Sr(1), one B(1), and one B(4) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one K(1), one B(4), and one B(5) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one K(1), one K(2), one V(1), and one B(5) atom. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one K(1), one Sr(1), and one V(1) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one K(1), one K(2), one B(1), and one B(5) atom. In the seventh O site, O(7) is bonded in a distorted bent 120 degrees geometry to one K(2), one Sr(1), one B(1), and one B(3) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one K(2), two equivalent K(1), and one V(1) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one K(1), one Sr(1), one B(1), and one B(2) atom. In the tenth O site, O(10) is bonded in a distorted bent 120 degrees geometry to one K(2), one Sr(1), one B(2), and one B(3) atom. In the eleventh O site, O(11) is bonded in a distorted bent 120 degrees geometry to one K(1), one K(2), one B(3), and one B(4) atom. In the twelfth O site, O(12) is bonded in a distorted bent 150 degrees geometry to one Sr(1), one B(2), and one B(3) atom.
K2SrVB5O12 crystallizes in the monoclinic P2_1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 8-coordinate geometry to one O(11), one O(3), one O(4), one O(5), one O(6), one O(9), and two equivalent O(8) atoms. The K(1)-O(11) bond length is 3.24 Å. The K(1)-O(3) bond length is 2.91 Å. The K(1)-O(4) bond length is 3.21 Å. The K(1)-O(5) bond length is 2.68 Å. The K(1)-O(6) bond length is 2.81 Å. The K(1)-O(9) bond length is 2.96 Å. There is one shorter (2.59 Å) and one longer (3.30 Å) K(1)-O(8) bond length. In the second K site, K(2) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(11), one O(4), one O(6), one O(7), and one O(8) atom. The K(2)-O(1) bond length is 2.99 Å. The K(2)-O(10) bond length is 3.03 Å. The K(2)-O(11) bond length is 3.07 Å. The K(2)-O(4) bond length is 2.85 Å. The K(2)-O(6) bond length is 3.21 Å. The K(2)-O(7) bond length is 2.68 Å. The K(2)-O(8) bond length is 2.57 Å. Sr(1) is bonded in a 9-coordinate geometry to one O(10), one O(12), one O(5), one O(7), one O(9), two equivalent O(1), and two equivalent O(2) atoms. The Sr(1)-O(10) bond length is 2.85 Å. The Sr(1)-O(12) bond length is 2.98 Å. The Sr(1)-O(5) bond length is 2.50 Å. The Sr(1)-O(7) bond length is 2.63 Å. The Sr(1)-O(9) bond length is 2.63 Å. There is one shorter (2.60 Å) and one longer (2.85 Å) Sr(1)-O(1) bond length. There is one shorter (2.66 Å) and one longer (2.84 Å) Sr(1)-O(2) bond length. V(1) is bonded in a tetrahedral geometry to one O(1), one O(4), one O(5), and one O(8) atom. The V(1)-O(1) bond length is 1.73 Å. The V(1)-O(4) bond length is 1.89 Å. The V(1)-O(5) bond length is 1.71 Å. The V(1)-O(8) bond length is 1.68 Å. There are five inequivalent B sites. In the first B site, B(1) is bonded to one O(2), one O(6), one O(7), and one O(9) atom to form corner-sharing BO4 tetrahedra. The B(1)-O(2) bond length is 1.51 Å. The B(1)-O(6) bond length is 1.48 Å. The B(1)-O(7) bond length is 1.46 Å. The B(1)-O(9) bond length is 1.49 Å. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(10), one O(12), and one O(9) atom. The B(2)-O(10) bond length is 1.38 Å. The B(2)-O(12) bond length is 1.36 Å. The B(2)-O(9) bond length is 1.39 Å. In the third B site, B(3) is bonded to one O(10), one O(11), one O(12), and one O(7) atom to form corner-sharing BO4 tetrahedra. The B(3)-O(10) bond length is 1.52 Å. The B(3)-O(11) bond length is 1.48 Å. The B(3)-O(12) bond length is 1.47 Å. The B(3)-O(7) bond length is 1.47 Å. In the fourth B site, B(4) is bonded in a trigonal planar geometry to one O(11), one O(2), and one O(3) atom. The B(4)-O(11) bond length is 1.35 Å. The B(4)-O(2) bond length is 1.39 Å. The B(4)-O(3) bond length is 1.40 Å. In the fifth B site, B(5) is bonded in a trigonal planar geometry to one O(3), one O(4), and one O(6) atom. The B(5)-O(3) bond length is 1.40 Å. The B(5)-O(4) bond length is 1.37 Å. The B(5)-O(6) bond length is 1.37 Å. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one K(2), two equivalent Sr(1), and one V(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to two equivalent Sr(1), one B(1), and one B(4) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one K(1), one B(4), and one B(5) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one K(1), one K(2), one V(1), and one B(5) atom. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one K(1), one Sr(1), and one V(1) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one K(1), one K(2), one B(1), and one B(5) atom. In the seventh O site, O(7) is bonded in a distorted bent 120 degrees geometry to one K(2), one Sr(1), one B(1), and one B(3) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one K(2), two equivalent K(1), and one V(1) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one K(1), one Sr(1), one B(1), and one B(2) atom. In the tenth O site, O(10) is bonded in a distorted bent 120 degrees geometry to one K(2), one Sr(1), one B(2), and one B(3) atom. In the eleventh O site, O(11) is bonded in a distorted bent 120 degrees geometry to one K(1), one K(2), one B(3), and one B(4) atom. In the twelfth O site, O(12) is bonded in a distorted bent 150 degrees geometry to one Sr(1), one B(2), and one B(3) atom.