V2GaO5 crystallizes in the triclinic P-1 space group. There are seven inequivalent V sites. In the first V site, V(1) is bonded to one O(2), one O(3), one O(4), one O(9), and two equivalent O(1) atoms to form VO6 octahedra that share  a cornercorner with one V(3)O6 octahedra,  a cornercorner with one V(4)O6 octahedra,  a cornercorner with one V(5)O6 octahedra,  a cornercorner with one Ga(3)O6 octahedra, corners with two equivalent V(2)O6 octahedra,  a cornercorner with one Ga(1)O4 tetrahedra,  a cornercorner with one Ga(2)O4 tetrahedra,  an edgeedge with one V(1)O6 octahedra, and edges with two equivalent V(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-53°. In the second V site, V(2) is bonded to one O(2), one O(3), one O(5), one O(8), and two equivalent O(1) atoms to form VO6 octahedra that share  a cornercorner with one V(3)O6 octahedra,  a cornercorner with one V(4)O6 octahedra,  a cornercorner with one V(5)O6 octahedra,  a cornercorner with one Ga(3)O6 octahedra, corners with two equivalent V(1)O6 octahedra,  a cornercorner with one Ga(1)O4 tetrahedra,  a cornercorner with one Ga(2)O4 tetrahedra,  an edgeedge with one V(2)O6 octahedra, and edges with two equivalent V(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-52°. In the third V site, V(3) is bonded to two equivalent O(3), two equivalent O(6), and two equivalent O(7) atoms to form a mixture of corner and edge-sharing VO6 octahedra. The corner-sharing octahedral tilt angles range from 49-52°. In the fourth V site, V(4) is bonded to two equivalent O(2), two equivalent O(6), and two equivalent O(7) atoms to form a mixture of corner and edge-sharing VO6 octahedra. The corner-sharing octahedral tilt angles range from 48-52°. In the fifth V site, V(5) is bonded to one O(13), one O(15), one O(8), one O(9), and two equivalent O(14) atoms to form VO6 octahedra that share  a cornercorner with one V(1)O6 octahedra,  a cornercorner with one V(2)O6 octahedra,  a cornercorner with one V(6)O6 octahedra,  a cornercorner with one V(7)O6 octahedra,  a cornercorner with one Ga(2)O4 tetrahedra, corners with two equivalent Ga(1)O4 tetrahedra,  an edgeedge with one V(5)O6 octahedra, and edges with three equivalent Ga(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-54°. In the sixth V site, V(6) is bonded to one O(11), one O(12), one O(13), one O(7), and two equivalent O(10) atoms to form distorted VO6 octahedra that share  a cornercorner with one V(3)O6 octahedra,  a cornercorner with one V(4)O6 octahedra,  a cornercorner with one V(5)O6 octahedra,  a cornercorner with one Ga(3)O6 octahedra,  a cornercorner with one Ga(2)O4 tetrahedra, corners with two equivalent Ga(1)O4 tetrahedra,  an edgeedge with one V(6)O6 octahedra, and edges with three equivalent V(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-54°. In the seventh V site, V(7) is bonded to one O(10), one O(12), one O(13), one O(6), and two equivalent O(11) atoms to form distorted VO6 octahedra that share  a cornercorner with one V(3)O6 octahedra,  a cornercorner with one V(4)O6 octahedra,  a cornercorner with one V(5)O6 octahedra,  a cornercorner with one Ga(3)O6 octahedra,  a cornercorner with one Ga(1)O4 tetrahedra, corners with two equivalent Ga(2)O4 tetrahedra,  an edgeedge with one V(7)O6 octahedra, and edges with three equivalent V(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-52°. There are three inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to one O(10), one O(14), one O(4), and one O(5) atom to form GaO4 tetrahedra that share  a cornercorner with one V(1)O6 octahedra,  a cornercorner with one V(2)O6 octahedra,  a cornercorner with one V(7)O6 octahedra,  a cornercorner with one Ga(3)O6 octahedra, corners with two equivalent V(5)O6 octahedra, corners with two equivalent V(6)O6 octahedra, and corners with two equivalent Ga(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 57-66°. In the second Ga site, Ga(2) is bonded to one O(11), one O(15), one O(4), and one O(5) atom to form GaO4 tetrahedra that share  a cornercorner with one V(1)O6 octahedra,  a cornercorner with one V(2)O6 octahedra,  a cornercorner with one V(5)O6 octahedra,  a cornercorner with one V(6)O6 octahedra, corners with two equivalent V(7)O6 octahedra, corners with two equivalent Ga(3)O6 octahedra, and corners with two equivalent Ga(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 57-66°. In the third Ga site, Ga(3) is bonded to one O(12), one O(14), one O(8), one O(9), and two equivalent O(15) atoms to form GaO6 octahedra that share  a cornercorner with one V(1)O6 octahedra,  a cornercorner with one V(2)O6 octahedra,  a cornercorner with one V(6)O6 octahedra,  a cornercorner with one V(7)O6 octahedra,  a cornercorner with one Ga(1)O4 tetrahedra, corners with two equivalent Ga(2)O4 tetrahedra,  an edgeedge with one Ga(3)O6 octahedra, and edges with three equivalent V(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-53°. There are fifteen inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to two equivalent V(1) and two equivalent V(2) atoms. In the second O site, O(2) is bonded in a trigonal planar geometry to one V(1), one V(2), and one V(4) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one V(1), one V(2), and one V(3) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one V(1), one Ga(1), and one Ga(2) atom. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one V(2), one Ga(1), and one Ga(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one V(3), one V(4), and one V(7) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one V(3), one V(4), and one V(6) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one V(2), one V(5), and one Ga(3) atom. In the ninth O site, O(9) is bonded in a trigonal planar geometry to one V(1), one V(5), and one Ga(3) atom. In the tenth O site, O(10) is bonded to one V(7), two equivalent V(6), and one Ga(1) atom to form OV3Ga tetrahedra that share  a cornercorner with one O(14)V2Ga2 tetrahedra, corners with two equivalent O(11)V3Ga tetrahedra,  an edgeedge with one O(10)V3Ga tetrahedra, and  an edgeedge with one O(11)V3Ga tetrahedra. In the eleventh O site, O(11) is bonded to one V(6), two equivalent V(7), and one Ga(2) atom to form OV3Ga tetrahedra that share  a cornercorner with one O(15)VGa3 tetrahedra, corners with two equivalent O(10)V3Ga tetrahedra,  an edgeedge with one O(10)V3Ga tetrahedra, and  an edgeedge with one O(11)V3Ga tetrahedra. In the twelfth O site, O(12) is bonded in a trigonal planar geometry to one V(6), one V(7), and one Ga(3) atom. In the thirteenth O site, O(13) is bonded in a trigonal planar geometry to one V(5), one V(6), and one V(7) atom. In the fourteenth O site, O(14) is bonded to two equivalent V(5), one Ga(1), and one Ga(3) atom to form distorted OV2Ga2 tetrahedra that share  a cornercorner with one O(10)V3Ga tetrahedra, corners with two equivalent O(15)VGa3 tetrahedra,  an edgeedge with one O(14)V2Ga2 tetrahedra, and  an edgeedge with one O(15)VGa3 tetrahedra. In the fifteenth O site, O(15) is bonded to one V(5), one Ga(2), and two equivalent Ga(3) atoms to form distorted OVGa3 tetrahedra that share  a cornercorner with one O(11)V3Ga tetrahedra, corners with two equivalent O(14)V2Ga2 tetrahedra,  an edgeedge with one O(14)V2Ga2 tetrahedra, and  an edgeedge with one O(15)VGa3 tetrahedra.
V2GaO5 crystallizes in the triclinic P-1 space group. There are seven inequivalent V sites. In the first V site, V(1) is bonded to one O(2), one O(3), one O(4), one O(9), and two equivalent O(1) atoms to form VO6 octahedra that share  a cornercorner with one V(3)O6 octahedra,  a cornercorner with one V(4)O6 octahedra,  a cornercorner with one V(5)O6 octahedra,  a cornercorner with one Ga(3)O6 octahedra, corners with two equivalent V(2)O6 octahedra,  a cornercorner with one Ga(1)O4 tetrahedra,  a cornercorner with one Ga(2)O4 tetrahedra,  an edgeedge with one V(1)O6 octahedra, and edges with two equivalent V(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-53°. The V(1)-O(2) bond length is 2.02 Å. The V(1)-O(3) bond length is 2.01 Å. The V(1)-O(4) bond length is 2.04 Å. The V(1)-O(9) bond length is 1.97 Å. There is one shorter (2.19 Å) and one longer (2.20 Å) V(1)-O(1) bond length. In the second V site, V(2) is bonded to one O(2), one O(3), one O(5), one O(8), and two equivalent O(1) atoms to form VO6 octahedra that share  a cornercorner with one V(3)O6 octahedra,  a cornercorner with one V(4)O6 octahedra,  a cornercorner with one V(5)O6 octahedra,  a cornercorner with one Ga(3)O6 octahedra, corners with two equivalent V(1)O6 octahedra,  a cornercorner with one Ga(1)O4 tetrahedra,  a cornercorner with one Ga(2)O4 tetrahedra,  an edgeedge with one V(2)O6 octahedra, and edges with two equivalent V(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-52°. The V(2)-O(2) bond length is 1.95 Å. The V(2)-O(3) bond length is 1.95 Å. The V(2)-O(5) bond length is 2.07 Å. The V(2)-O(8) bond length is 1.84 Å. Both V(2)-O(1) bond lengths are 2.11 Å. In the third V site, V(3) is bonded to two equivalent O(3), two equivalent O(6), and two equivalent O(7) atoms to form a mixture of corner and edge-sharing VO6 octahedra. The corner-sharing octahedral tilt angles range from 49-52°. Both V(3)-O(3) bond lengths are 2.00 Å. Both V(3)-O(6) bond lengths are 2.07 Å. Both V(3)-O(7) bond lengths are 2.07 Å. In the fourth V site, V(4) is bonded to two equivalent O(2), two equivalent O(6), and two equivalent O(7) atoms to form a mixture of corner and edge-sharing VO6 octahedra. The corner-sharing octahedral tilt angles range from 48-52°. Both V(4)-O(2) bond lengths are 2.00 Å. Both V(4)-O(6) bond lengths are 2.07 Å. Both V(4)-O(7) bond lengths are 2.07 Å. In the fifth V site, V(5) is bonded to one O(13), one O(15), one O(8), one O(9), and two equivalent O(14) atoms to form VO6 octahedra that share  a cornercorner with one V(1)O6 octahedra,  a cornercorner with one V(2)O6 octahedra,  a cornercorner with one V(6)O6 octahedra,  a cornercorner with one V(7)O6 octahedra,  a cornercorner with one Ga(2)O4 tetrahedra, corners with two equivalent Ga(1)O4 tetrahedra,  an edgeedge with one V(5)O6 octahedra, and edges with three equivalent Ga(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-54°. The V(5)-O(13) bond length is 1.96 Å. The V(5)-O(15) bond length is 2.14 Å. The V(5)-O(8) bond length is 2.05 Å. The V(5)-O(9) bond length is 1.94 Å. There is one shorter (2.06 Å) and one longer (2.11 Å) V(5)-O(14) bond length. In the sixth V site, V(6) is bonded to one O(11), one O(12), one O(13), one O(7), and two equivalent O(10) atoms to form distorted VO6 octahedra that share  a cornercorner with one V(3)O6 octahedra,  a cornercorner with one V(4)O6 octahedra,  a cornercorner with one V(5)O6 octahedra,  a cornercorner with one Ga(3)O6 octahedra,  a cornercorner with one Ga(2)O4 tetrahedra, corners with two equivalent Ga(1)O4 tetrahedra,  an edgeedge with one V(6)O6 octahedra, and edges with three equivalent V(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-54°. The V(6)-O(11) bond length is 2.07 Å. The V(6)-O(12) bond length is 1.95 Å. The V(6)-O(13) bond length is 1.95 Å. The V(6)-O(7) bond length is 1.78 Å. There is one shorter (2.06 Å) and one longer (2.18 Å) V(6)-O(10) bond length. In the seventh V site, V(7) is bonded to one O(10), one O(12), one O(13), one O(6), and two equivalent O(11) atoms to form distorted VO6 octahedra that share  a cornercorner with one V(3)O6 octahedra,  a cornercorner with one V(4)O6 octahedra,  a cornercorner with one V(5)O6 octahedra,  a cornercorner with one Ga(3)O6 octahedra,  a cornercorner with one Ga(1)O4 tetrahedra, corners with two equivalent Ga(2)O4 tetrahedra,  an edgeedge with one V(7)O6 octahedra, and edges with three equivalent V(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-52°. The V(7)-O(10) bond length is 2.07 Å. The V(7)-O(12) bond length is 1.94 Å. The V(7)-O(13) bond length is 1.94 Å. The V(7)-O(6) bond length is 1.79 Å. There is one shorter (2.07 Å) and one longer (2.18 Å) V(7)-O(11) bond length. There are three inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to one O(10), one O(14), one O(4), and one O(5) atom to form GaO4 tetrahedra that share  a cornercorner with one V(1)O6 octahedra,  a cornercorner with one V(2)O6 octahedra,  a cornercorner with one V(7)O6 octahedra,  a cornercorner with one Ga(3)O6 octahedra, corners with two equivalent V(5)O6 octahedra, corners with two equivalent V(6)O6 octahedra, and corners with two equivalent Ga(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 57-66°. The Ga(1)-O(10) bond length is 1.91 Å. The Ga(1)-O(14) bond length is 1.86 Å. The Ga(1)-O(4) bond length is 1.82 Å. The Ga(1)-O(5) bond length is 1.82 Å. In the second Ga site, Ga(2) is bonded to one O(11), one O(15), one O(4), and one O(5) atom to form GaO4 tetrahedra that share  a cornercorner with one V(1)O6 octahedra,  a cornercorner with one V(2)O6 octahedra,  a cornercorner with one V(5)O6 octahedra,  a cornercorner with one V(6)O6 octahedra, corners with two equivalent V(7)O6 octahedra, corners with two equivalent Ga(3)O6 octahedra, and corners with two equivalent Ga(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 57-66°. The Ga(2)-O(11) bond length is 1.91 Å. The Ga(2)-O(15) bond length is 1.87 Å. The Ga(2)-O(4) bond length is 1.82 Å. The Ga(2)-O(5) bond length is 1.82 Å. In the third Ga site, Ga(3) is bonded to one O(12), one O(14), one O(8), one O(9), and two equivalent O(15) atoms to form GaO6 octahedra that share  a cornercorner with one V(1)O6 octahedra,  a cornercorner with one V(2)O6 octahedra,  a cornercorner with one V(6)O6 octahedra,  a cornercorner with one V(7)O6 octahedra,  a cornercorner with one Ga(1)O4 tetrahedra, corners with two equivalent Ga(2)O4 tetrahedra,  an edgeedge with one Ga(3)O6 octahedra, and edges with three equivalent V(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-53°. The Ga(3)-O(12) bond length is 1.96 Å. The Ga(3)-O(14) bond length is 2.10 Å. The Ga(3)-O(8) bond length is 1.97 Å. The Ga(3)-O(9) bond length is 1.93 Å. There is one shorter (2.05 Å) and one longer (2.10 Å) Ga(3)-O(15) bond length. There are fifteen inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to two equivalent V(1) and two equivalent V(2) atoms. In the second O site, O(2) is bonded in a trigonal planar geometry to one V(1), one V(2), and one V(4) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one V(1), one V(2), and one V(3) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one V(1), one Ga(1), and one Ga(2) atom. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one V(2), one Ga(1), and one Ga(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one V(3), one V(4), and one V(7) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one V(3), one V(4), and one V(6) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one V(2), one V(5), and one Ga(3) atom. In the ninth O site, O(9) is bonded in a trigonal planar geometry to one V(1), one V(5), and one Ga(3) atom. In the tenth O site, O(10) is bonded to one V(7), two equivalent V(6), and one Ga(1) atom to form OV3Ga tetrahedra that share  a cornercorner with one O(14)V2Ga2 tetrahedra, corners with two equivalent O(11)V3Ga tetrahedra,  an edgeedge with one O(10)V3Ga tetrahedra, and  an edgeedge with one O(11)V3Ga tetrahedra. In the eleventh O site, O(11) is bonded to one V(6), two equivalent V(7), and one Ga(2) atom to form OV3Ga tetrahedra that share  a cornercorner with one O(15)VGa3 tetrahedra, corners with two equivalent O(10)V3Ga tetrahedra,  an edgeedge with one O(10)V3Ga tetrahedra, and  an edgeedge with one O(11)V3Ga tetrahedra. In the twelfth O site, O(12) is bonded in a trigonal planar geometry to one V(6), one V(7), and one Ga(3) atom. In the thirteenth O site, O(13) is bonded in a trigonal planar geometry to one V(5), one V(6), and one V(7) atom. In the fourteenth O site, O(14) is bonded to two equivalent V(5), one Ga(1), and one Ga(3) atom to form distorted OV2Ga2 tetrahedra that share  a cornercorner with one O(10)V3Ga tetrahedra, corners with two equivalent O(15)VGa3 tetrahedra,  an edgeedge with one O(14)V2Ga2 tetrahedra, and  an edgeedge with one O(15)VGa3 tetrahedra. In the fifteenth O site, O(15) is bonded to one V(5), one Ga(2), and two equivalent Ga(3) atoms to form distorted OVGa3 tetrahedra that share  a cornercorner with one O(11)V3Ga tetrahedra, corners with two equivalent O(14)V2Ga2 tetrahedra,  an edgeedge with one O(14)V2Ga2 tetrahedra, and  an edgeedge with one O(15)VGa3 tetrahedra.