Er17Ru6Te3 crystallizes in the triclinic P-1 space group. There are eighteen inequivalent Er sites. In the first Er site, Er(1) is bonded in a 3-coordinate geometry to three equivalent Ru(4) and one Te(1) atom. In the second Er site, Er(2) is bonded in a 5-coordinate geometry to one Ru(2), two equivalent Ru(4), and two equivalent Te(3) atoms. In the third Er site, Er(3) is bonded in a 2-coordinate geometry to three equivalent Ru(6) and two equivalent Te(1) atoms. In the fourth Er site, Er(4) is bonded to one Ru(4), two equivalent Ru(5), and one Te(3) atom to form a mixture of distorted edge and corner-sharing ErTeRu3 tetrahedra. In the fifth Er site, Er(5) is bonded in a 2-coordinate geometry to one Ru(4), two equivalent Ru(2), and two equivalent Te(1) atoms. In the sixth Er site, Er(6) is bonded in a 4-coordinate geometry to one Ru(6), two equivalent Ru(2), and one Te(2) atom. In the seventh Er site, Er(7) is bonded in a 6-coordinate geometry to two equivalent Ru(1), two equivalent Ru(3), and two equivalent Te(3) atoms. In the eighth Er site, Er(8) is bonded in a 2-coordinate geometry to one Ru(5), two equivalent Ru(1), and two equivalent Te(3) atoms. In the ninth Er site, Er(9) is bonded in a 2-coordinate geometry to one Ru(2), two equivalent Ru(3), and two equivalent Te(2) atoms. In the tenth Er site, Er(10) is bonded in a 4-coordinate geometry to one Ru(3), two equivalent Ru(2), and one Te(3) atom. In the eleventh Er site, Er(11) is bonded to one Ru(1), two equivalent Ru(5), and one Te(2) atom to form a mixture of distorted edge and corner-sharing ErTeRu3 tetrahedra. In the twelfth Er site, Er(12) is bonded in a 5-coordinate geometry to one Ru(5), two equivalent Ru(6), and two equivalent Te(2) atoms. In the thirteenth Er site, Er(13) is bonded in a 6-coordinate geometry to two equivalent Ru(1), two equivalent Ru(3), and two equivalent Te(2) atoms. In the fourteenth Er site, Er(14) is bonded in a 4-coordinate geometry to one Ru(2), two equivalent Ru(6), and one Te(1) atom. In the fifteenth Er site, Er(15) is bonded in a 5-coordinate geometry to one Ru(5), two equivalent Ru(4), and two equivalent Te(1) atoms. In the sixteenth Er site, Er(16) is bonded to one Ru(6), two equivalent Ru(5), and one Te(1) atom to form a mixture of distorted edge and corner-sharing ErTeRu3 tetrahedra. In the seventeenth Er site, Er(17) is bonded in a square co-planar geometry to two equivalent Ru(1) and two equivalent Te(3) atoms. In the eighteenth Er site, Er(18) is bonded in a square co-planar geometry to two equivalent Ru(3) and two equivalent Te(2) atoms. There are six inequivalent Ru sites. In the first Ru site, Ru(1) is bonded in a 8-coordinate geometry to one Er(11), one Er(17), two equivalent Er(13), two equivalent Er(7), and two equivalent Er(8) atoms. In the second Ru site, Ru(2) is bonded in a 9-coordinate geometry to one Er(14), one Er(2), one Er(9), two equivalent Er(10), two equivalent Er(5), and two equivalent Er(6) atoms. In the third Ru site, Ru(3) is bonded in a 8-coordinate geometry to one Er(10), one Er(18), two equivalent Er(13), two equivalent Er(7), and two equivalent Er(9) atoms. In the fourth Ru site, Ru(4) is bonded in a 9-coordinate geometry to one Er(4), one Er(5), two equivalent Er(15), two equivalent Er(2), and three equivalent Er(1) atoms. In the fifth Ru site, Ru(5) is bonded in a 9-coordinate geometry to one Er(12), one Er(15), one Er(8), two equivalent Er(11), two equivalent Er(16), and two equivalent Er(4) atoms. In the sixth Ru site, Ru(6) is bonded in a 9-coordinate geometry to one Er(16), one Er(6), two equivalent Er(12), two equivalent Er(14), and three equivalent Er(3) atoms. There are three inequivalent Te sites. In the first Te site, Te(1) is bonded in a 9-coordinate geometry to one Er(1), one Er(14), one Er(16), two equivalent Er(15), two equivalent Er(3), and two equivalent Er(5) atoms. In the second Te site, Te(2) is bonded in a 9-coordinate geometry to one Er(11), one Er(18), one Er(6), two equivalent Er(12), two equivalent Er(13), and two equivalent Er(9) atoms. In the third Te site, Te(3) is bonded in a 9-coordinate geometry to one Er(10), one Er(17), one Er(4), two equivalent Er(2), two equivalent Er(7), and two equivalent Er(8) atoms.
Er17Ru6Te3 crystallizes in the triclinic P-1 space group. There are eighteen inequivalent Er sites. In the first Er site, Er(1) is bonded in a 3-coordinate geometry to three equivalent Ru(4) and one Te(1) atom. There are two shorter (2.81 Å) and one longer (3.40 Å) Er(1)-Ru(4) bond length. The Er(1)-Te(1) bond length is 3.16 Å. In the second Er site, Er(2) is bonded in a 5-coordinate geometry to one Ru(2), two equivalent Ru(4), and two equivalent Te(3) atoms. The Er(2)-Ru(2) bond length is 3.18 Å. There is one shorter (2.91 Å) and one longer (2.92 Å) Er(2)-Ru(4) bond length. There is one shorter (3.52 Å) and one longer (3.54 Å) Er(2)-Te(3) bond length. In the third Er site, Er(3) is bonded in a 2-coordinate geometry to three equivalent Ru(6) and two equivalent Te(1) atoms. There are a spread of Er(3)-Ru(6) bond distances ranging from 2.90-3.62 Å. There is one shorter (3.49 Å) and one longer (3.50 Å) Er(3)-Te(1) bond length. In the fourth Er site, Er(4) is bonded to one Ru(4), two equivalent Ru(5), and one Te(3) atom to form a mixture of distorted edge and corner-sharing ErTeRu3 tetrahedra. The Er(4)-Ru(4) bond length is 2.96 Å. There is one shorter (2.82 Å) and one longer (2.83 Å) Er(4)-Ru(5) bond length. The Er(4)-Te(3) bond length is 3.17 Å. In the fifth Er site, Er(5) is bonded in a 2-coordinate geometry to one Ru(4), two equivalent Ru(2), and two equivalent Te(1) atoms. The Er(5)-Ru(4) bond length is 3.49 Å. Both Er(5)-Ru(2) bond lengths are 2.82 Å. There is one shorter (3.39 Å) and one longer (3.41 Å) Er(5)-Te(1) bond length. In the sixth Er site, Er(6) is bonded in a 4-coordinate geometry to one Ru(6), two equivalent Ru(2), and one Te(2) atom. The Er(6)-Ru(6) bond length is 3.19 Å. There is one shorter (2.86 Å) and one longer (2.87 Å) Er(6)-Ru(2) bond length. The Er(6)-Te(2) bond length is 3.15 Å. In the seventh Er site, Er(7) is bonded in a 6-coordinate geometry to two equivalent Ru(1), two equivalent Ru(3), and two equivalent Te(3) atoms. There is one shorter (2.89 Å) and one longer (2.90 Å) Er(7)-Ru(1) bond length. Both Er(7)-Ru(3) bond lengths are 3.09 Å. There is one shorter (3.28 Å) and one longer (3.30 Å) Er(7)-Te(3) bond length. In the eighth Er site, Er(8) is bonded in a 2-coordinate geometry to one Ru(5), two equivalent Ru(1), and two equivalent Te(3) atoms. The Er(8)-Ru(5) bond length is 3.46 Å. Both Er(8)-Ru(1) bond lengths are 2.81 Å. There is one shorter (3.34 Å) and one longer (3.36 Å) Er(8)-Te(3) bond length. In the ninth Er site, Er(9) is bonded in a 2-coordinate geometry to one Ru(2), two equivalent Ru(3), and two equivalent Te(2) atoms. The Er(9)-Ru(2) bond length is 3.65 Å. There is one shorter (2.79 Å) and one longer (2.80 Å) Er(9)-Ru(3) bond length. Both Er(9)-Te(2) bond lengths are 3.35 Å. In the tenth Er site, Er(10) is bonded in a 4-coordinate geometry to one Ru(3), two equivalent Ru(2), and one Te(3) atom. The Er(10)-Ru(3) bond length is 2.97 Å. Both Er(10)-Ru(2) bond lengths are 2.87 Å. The Er(10)-Te(3) bond length is 3.11 Å. In the eleventh Er site, Er(11) is bonded to one Ru(1), two equivalent Ru(5), and one Te(2) atom to form a mixture of distorted edge and corner-sharing ErTeRu3 tetrahedra. The Er(11)-Ru(1) bond length is 2.86 Å. Both Er(11)-Ru(5) bond lengths are 2.85 Å. The Er(11)-Te(2) bond length is 3.16 Å. In the twelfth Er site, Er(12) is bonded in a 5-coordinate geometry to one Ru(5), two equivalent Ru(6), and two equivalent Te(2) atoms. The Er(12)-Ru(5) bond length is 3.26 Å. Both Er(12)-Ru(6) bond lengths are 2.90 Å. There is one shorter (3.39 Å) and one longer (3.40 Å) Er(12)-Te(2) bond length. In the thirteenth Er site, Er(13) is bonded in a 6-coordinate geometry to two equivalent Ru(1), two equivalent Ru(3), and two equivalent Te(2) atoms. There is one shorter (3.08 Å) and one longer (3.10 Å) Er(13)-Ru(1) bond length. There is one shorter (2.87 Å) and one longer (2.88 Å) Er(13)-Ru(3) bond length. There is one shorter (3.30 Å) and one longer (3.31 Å) Er(13)-Te(2) bond length. In the fourteenth Er site, Er(14) is bonded in a 4-coordinate geometry to one Ru(2), two equivalent Ru(6), and one Te(1) atom. The Er(14)-Ru(2) bond length is 3.23 Å. Both Er(14)-Ru(6) bond lengths are 2.82 Å. The Er(14)-Te(1) bond length is 3.12 Å. In the fifteenth Er site, Er(15) is bonded in a 5-coordinate geometry to one Ru(5), two equivalent Ru(4), and two equivalent Te(1) atoms. The Er(15)-Ru(5) bond length is 3.28 Å. There is one shorter (2.90 Å) and one longer (2.91 Å) Er(15)-Ru(4) bond length. There is one shorter (3.36 Å) and one longer (3.39 Å) Er(15)-Te(1) bond length. In the sixteenth Er site, Er(16) is bonded to one Ru(6), two equivalent Ru(5), and one Te(1) atom to form a mixture of distorted edge and corner-sharing ErTeRu3 tetrahedra. The Er(16)-Ru(6) bond length is 3.02 Å. Both Er(16)-Ru(5) bond lengths are 2.80 Å. The Er(16)-Te(1) bond length is 3.15 Å. In the seventeenth Er site, Er(17) is bonded in a square co-planar geometry to two equivalent Ru(1) and two equivalent Te(3) atoms. Both Er(17)-Ru(1) bond lengths are 3.13 Å. Both Er(17)-Te(3) bond lengths are 3.25 Å. In the eighteenth Er site, Er(18) is bonded in a square co-planar geometry to two equivalent Ru(3) and two equivalent Te(2) atoms. Both Er(18)-Ru(3) bond lengths are 3.18 Å. Both Er(18)-Te(2) bond lengths are 3.18 Å. There are six inequivalent Ru sites. In the first Ru site, Ru(1) is bonded in a 8-coordinate geometry to one Er(11), one Er(17), two equivalent Er(13), two equivalent Er(7), and two equivalent Er(8) atoms. In the second Ru site, Ru(2) is bonded in a 9-coordinate geometry to one Er(14), one Er(2), one Er(9), two equivalent Er(10), two equivalent Er(5), and two equivalent Er(6) atoms. In the third Ru site, Ru(3) is bonded in a 8-coordinate geometry to one Er(10), one Er(18), two equivalent Er(13), two equivalent Er(7), and two equivalent Er(9) atoms. In the fourth Ru site, Ru(4) is bonded in a 9-coordinate geometry to one Er(4), one Er(5), two equivalent Er(15), two equivalent Er(2), and three equivalent Er(1) atoms. In the fifth Ru site, Ru(5) is bonded in a 9-coordinate geometry to one Er(12), one Er(15), one Er(8), two equivalent Er(11), two equivalent Er(16), and two equivalent Er(4) atoms. In the sixth Ru site, Ru(6) is bonded in a 9-coordinate geometry to one Er(16), one Er(6), two equivalent Er(12), two equivalent Er(14), and three equivalent Er(3) atoms. There are three inequivalent Te sites. In the first Te site, Te(1) is bonded in a 9-coordinate geometry to one Er(1), one Er(14), one Er(16), two equivalent Er(15), two equivalent Er(3), and two equivalent Er(5) atoms. In the second Te site, Te(2) is bonded in a 9-coordinate geometry to one Er(11), one Er(18), one Er(6), two equivalent Er(12), two equivalent Er(13), and two equivalent Er(9) atoms. In the third Te site, Te(3) is bonded in a 9-coordinate geometry to one Er(10), one Er(17), one Er(4), two equivalent Er(2), two equivalent Er(7), and two equivalent Er(8) atoms.