Ba2YGaTe5 crystallizes in the orthorhombic Cmc2_1 space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 7-coordinate geometry to one Te(3), two equivalent Te(1), two equivalent Te(2), and two equivalent Te(4) atoms. In the second Ba site, Ba(2) is bonded in a 8-coordinate geometry to one Te(2), one Te(5), two equivalent Te(1), two equivalent Te(3), and two equivalent Te(4) atoms. Y(1) is bonded to one Te(1), one Te(5), two equivalent Te(2), and two equivalent Te(3) atoms to form YTe6 octahedra that share edges with two equivalent Y(1)Te6 octahedra and edges with two equivalent Ga(1)Te4 tetrahedra. Ga(1) is bonded to one Te(3), one Te(4), and two equivalent Te(5) atoms to form GaTe4 tetrahedra that share corners with two equivalent Ga(1)Te4 tetrahedra and edges with two equivalent Y(1)Te6 octahedra. There are five inequivalent Te sites. In the first Te site, Te(1) is bonded to two equivalent Ba(1), two equivalent Ba(2), and one Y(1) atom to form TeBa4Y square pyramids that share corners with two equivalent Te(3)Ba3Y2Ga octahedra, corners with four equivalent Te(4)Ba4Ga square pyramids, corners with two equivalent Te(2)Ba3Y2 trigonal bipyramids, edges with three equivalent Te(3)Ba3Y2Ga octahedra, edges with two equivalent Te(4)Ba4Ga square pyramids, edges with two equivalent Te(1)Ba4Y square pyramids, and edges with three equivalent Te(2)Ba3Y2 trigonal bipyramids. The corner-sharing octahedral tilt angles are 30°. In the second Te site, Te(2) is bonded to one Ba(2), two equivalent Ba(1), and two equivalent Y(1) atoms to form distorted TeBa3Y2 trigonal bipyramids that share corners with two equivalent Te(3)Ba3Y2Ga octahedra, corners with two equivalent Te(1)Ba4Y square pyramids, corners with four equivalent Te(4)Ba4Ga square pyramids, edges with three equivalent Te(3)Ba3Y2Ga octahedra,  an edgeedge with one Te(4)Ba4Ga square pyramid, edges with three equivalent Te(1)Ba4Y square pyramids, and edges with two equivalent Te(2)Ba3Y2 trigonal bipyramids. The corner-sharing octahedral tilt angles are 7°. In the third Te site, Te(3) is bonded to one Ba(1), two equivalent Ba(2), two equivalent Y(1), and one Ga(1) atom to form distorted TeBa3Y2Ga octahedra that share corners with two equivalent Te(1)Ba4Y square pyramids, corners with four equivalent Te(4)Ba4Ga square pyramids, corners with two equivalent Te(2)Ba3Y2 trigonal bipyramids, edges with two equivalent Te(3)Ba3Y2Ga octahedra, edges with three equivalent Te(1)Ba4Y square pyramids, edges with three equivalent Te(2)Ba3Y2 trigonal bipyramids, and  a faceface with one Te(4)Ba4Ga square pyramid. In the fourth Te site, Te(4) is bonded to two equivalent Ba(1), two equivalent Ba(2), and one Ga(1) atom to form TeBa4Ga square pyramids that share corners with four equivalent Te(3)Ba3Y2Ga octahedra, corners with four equivalent Te(1)Ba4Y square pyramids, corners with four equivalent Te(2)Ba3Y2 trigonal bipyramids, edges with two equivalent Te(4)Ba4Ga square pyramids, edges with two equivalent Te(1)Ba4Y square pyramids,  an edgeedge with one Te(2)Ba3Y2 trigonal bipyramid, and  a faceface with one Te(3)Ba3Y2Ga octahedra. The corner-sharing octahedral tilt angles range from 40-67°. In the fifth Te site, Te(5) is bonded in a 4-coordinate geometry to one Ba(2), one Y(1), and two equivalent Ga(1) atoms.
Ba2YGaTe5 crystallizes in the orthorhombic Cmc2_1 space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 7-coordinate geometry to one Te(3), two equivalent Te(1), two equivalent Te(2), and two equivalent Te(4) atoms. The Ba(1)-Te(3) bond length is 3.87 Å. Both Ba(1)-Te(1) bond lengths are 3.47 Å. Both Ba(1)-Te(2) bond lengths are 3.54 Å. Both Ba(1)-Te(4) bond lengths are 3.51 Å. In the second Ba site, Ba(2) is bonded in a 8-coordinate geometry to one Te(2), one Te(5), two equivalent Te(1), two equivalent Te(3), and two equivalent Te(4) atoms. The Ba(2)-Te(2) bond length is 3.58 Å. The Ba(2)-Te(5) bond length is 4.06 Å. Both Ba(2)-Te(1) bond lengths are 3.46 Å. Both Ba(2)-Te(3) bond lengths are 3.73 Å. Both Ba(2)-Te(4) bond lengths are 3.57 Å. Y(1) is bonded to one Te(1), one Te(5), two equivalent Te(2), and two equivalent Te(3) atoms to form YTe6 octahedra that share edges with two equivalent Y(1)Te6 octahedra and edges with two equivalent Ga(1)Te4 tetrahedra. The Y(1)-Te(1) bond length is 3.00 Å. The Y(1)-Te(5) bond length is 3.24 Å. Both Y(1)-Te(2) bond lengths are 3.05 Å. Both Y(1)-Te(3) bond lengths are 3.16 Å. Ga(1) is bonded to one Te(3), one Te(4), and two equivalent Te(5) atoms to form GaTe4 tetrahedra that share corners with two equivalent Ga(1)Te4 tetrahedra and edges with two equivalent Y(1)Te6 octahedra. The Ga(1)-Te(3) bond length is 2.70 Å. The Ga(1)-Te(4) bond length is 2.58 Å. Both Ga(1)-Te(5) bond lengths are 2.73 Å. There are five inequivalent Te sites. In the first Te site, Te(1) is bonded to two equivalent Ba(1), two equivalent Ba(2), and one Y(1) atom to form TeBa4Y square pyramids that share corners with two equivalent Te(3)Ba3Y2Ga octahedra, corners with four equivalent Te(4)Ba4Ga square pyramids, corners with two equivalent Te(2)Ba3Y2 trigonal bipyramids, edges with three equivalent Te(3)Ba3Y2Ga octahedra, edges with two equivalent Te(4)Ba4Ga square pyramids, edges with two equivalent Te(1)Ba4Y square pyramids, and edges with three equivalent Te(2)Ba3Y2 trigonal bipyramids. The corner-sharing octahedral tilt angles are 30°. In the second Te site, Te(2) is bonded to one Ba(2), two equivalent Ba(1), and two equivalent Y(1) atoms to form distorted TeBa3Y2 trigonal bipyramids that share corners with two equivalent Te(3)Ba3Y2Ga octahedra, corners with two equivalent Te(1)Ba4Y square pyramids, corners with four equivalent Te(4)Ba4Ga square pyramids, edges with three equivalent Te(3)Ba3Y2Ga octahedra,  an edgeedge with one Te(4)Ba4Ga square pyramid, edges with three equivalent Te(1)Ba4Y square pyramids, and edges with two equivalent Te(2)Ba3Y2 trigonal bipyramids. The corner-sharing octahedral tilt angles are 7°. In the third Te site, Te(3) is bonded to one Ba(1), two equivalent Ba(2), two equivalent Y(1), and one Ga(1) atom to form distorted TeBa3Y2Ga octahedra that share corners with two equivalent Te(1)Ba4Y square pyramids, corners with four equivalent Te(4)Ba4Ga square pyramids, corners with two equivalent Te(2)Ba3Y2 trigonal bipyramids, edges with two equivalent Te(3)Ba3Y2Ga octahedra, edges with three equivalent Te(1)Ba4Y square pyramids, edges with three equivalent Te(2)Ba3Y2 trigonal bipyramids, and  a faceface with one Te(4)Ba4Ga square pyramid. In the fourth Te site, Te(4) is bonded to two equivalent Ba(1), two equivalent Ba(2), and one Ga(1) atom to form TeBa4Ga square pyramids that share corners with four equivalent Te(3)Ba3Y2Ga octahedra, corners with four equivalent Te(1)Ba4Y square pyramids, corners with four equivalent Te(2)Ba3Y2 trigonal bipyramids, edges with two equivalent Te(4)Ba4Ga square pyramids, edges with two equivalent Te(1)Ba4Y square pyramids,  an edgeedge with one Te(2)Ba3Y2 trigonal bipyramid, and  a faceface with one Te(3)Ba3Y2Ga octahedra. The corner-sharing octahedral tilt angles range from 40-67°. In the fifth Te site, Te(5) is bonded in a 4-coordinate geometry to one Ba(2), one Y(1), and two equivalent Ga(1) atoms.