Sr2CaV2(Si2O7)2 crystallizes in the monoclinic C2 space group. Sr(1) is bonded in a 11-coordinate geometry to one O(6), two equivalent O(1), two equivalent O(4), two equivalent O(5), two equivalent O(7), and two equivalent O(8) atoms. Ca(1) is bonded in a 8-coordinate geometry to two equivalent O(2), two equivalent O(4), two equivalent O(6), and two equivalent O(8) atoms. V(1) is bonded in a 5-coordinate geometry to one O(4), one O(5), one O(6), one O(7), and one O(8) atom. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(2), one O(4), and one O(8) atom to form corner-sharing SiO4 tetrahedra. In the second Si site, Si(2) is bonded to one O(1), one O(3), one O(5), and one O(7) atom to form corner-sharing SiO4 tetrahedra. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to two equivalent Sr(1), one Si(1), and one Si(2) atom. In the second O site, O(2) is bonded in a distorted linear geometry to two equivalent Ca(1) and two equivalent Si(1) atoms. In the third O site, O(3) is bonded in a linear geometry to two equivalent Si(2) atoms. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to two equivalent Sr(1), one Ca(1), one V(1), and one Si(1) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one V(1), and one Si(2) atom. In the sixth O site, O(6) is bonded in a distorted T-shaped geometry to one Sr(1), one Ca(1), and one V(1) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one V(1), and one Si(2) atom. In the eighth O site, O(8) is bonded in a 1-coordinate geometry to two equivalent Sr(1), one Ca(1), one V(1), and one Si(1) atom.
Sr2CaV2(Si2O7)2 crystallizes in the monoclinic C2 space group. Sr(1) is bonded in a 11-coordinate geometry to one O(6), two equivalent O(1), two equivalent O(4), two equivalent O(5), two equivalent O(7), and two equivalent O(8) atoms. The Sr(1)-O(6) bond length is 2.82 Å. There is one shorter (2.86 Å) and one longer (3.00 Å) Sr(1)-O(1) bond length. There is one shorter (2.74 Å) and one longer (3.30 Å) Sr(1)-O(4) bond length. There is one shorter (2.59 Å) and one longer (2.75 Å) Sr(1)-O(5) bond length. There is one shorter (2.67 Å) and one longer (2.68 Å) Sr(1)-O(7) bond length. There is one shorter (3.00 Å) and one longer (3.21 Å) Sr(1)-O(8) bond length. Ca(1) is bonded in a 8-coordinate geometry to two equivalent O(2), two equivalent O(4), two equivalent O(6), and two equivalent O(8) atoms. There is one shorter (2.57 Å) and one longer (2.95 Å) Ca(1)-O(2) bond length. Both Ca(1)-O(4) bond lengths are 2.76 Å. Both Ca(1)-O(6) bond lengths are 2.15 Å. Both Ca(1)-O(8) bond lengths are 2.42 Å. V(1) is bonded in a 5-coordinate geometry to one O(4), one O(5), one O(6), one O(7), and one O(8) atom. The V(1)-O(4) bond length is 2.14 Å. The V(1)-O(5) bond length is 2.02 Å. The V(1)-O(6) bond length is 1.83 Å. The V(1)-O(7) bond length is 2.02 Å. The V(1)-O(8) bond length is 2.25 Å. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(2), one O(4), and one O(8) atom to form corner-sharing SiO4 tetrahedra. The Si(1)-O(1) bond length is 1.68 Å. The Si(1)-O(2) bond length is 1.63 Å. The Si(1)-O(4) bond length is 1.62 Å. The Si(1)-O(8) bond length is 1.62 Å. In the second Si site, Si(2) is bonded to one O(1), one O(3), one O(5), and one O(7) atom to form corner-sharing SiO4 tetrahedra. The Si(2)-O(1) bond length is 1.69 Å. The Si(2)-O(3) bond length is 1.62 Å. The Si(2)-O(5) bond length is 1.64 Å. The Si(2)-O(7) bond length is 1.63 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to two equivalent Sr(1), one Si(1), and one Si(2) atom. In the second O site, O(2) is bonded in a distorted linear geometry to two equivalent Ca(1) and two equivalent Si(1) atoms. In the third O site, O(3) is bonded in a linear geometry to two equivalent Si(2) atoms. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to two equivalent Sr(1), one Ca(1), one V(1), and one Si(1) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one V(1), and one Si(2) atom. In the sixth O site, O(6) is bonded in a distorted T-shaped geometry to one Sr(1), one Ca(1), and one V(1) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one V(1), and one Si(2) atom. In the eighth O site, O(8) is bonded in a 1-coordinate geometry to two equivalent Sr(1), one Ca(1), one V(1), and one Si(1) atom.