A new one‐dimensional strontium vanadium tellurite,Sr7V4Te12O41

Vanadium tellurites display a rich structural chemistry with interesting physical properties, such as second harmonic generation (SHG). Tellurites, i.e. Te⁴⁺O_x, are often observed in unusual structures and form various structural motifs, including isolated clusters, chains, layers, and three‐dimensional networks. Similarly, vanadates, i.e. V⁵⁺O_x, show rich structural features, such as VO₄ tetrahedra, VO₅ square pyramids or trigonal bipyramids, and VO₆ octahedra. Strontium vanadium tellurite, Sr₇V₄Te₁₂O₄₁, was obtained from the melt of the solid‐state reaction of SrTeO₄ and VO₂ in a sealed quartz tube as it cooled from 973 K. The crystal structure exhibits a one‐dimensional latticework along the a axis comprised of paired Sr₃Te₃O_x units, namely Sr₆Te₆O_2x+1, with corner‐shared TeO₄ polyhedra – and specifically the Te lone‐pair electrons – facing outward in the bc plane. The Sr₆Te₆O_2x+1 latticework is helical and is layered in the b‐axis direction against sheets of corner‐shared VO₄ tetrahedra, and is linked in the c‐axis direction via individual corner‐shared SrO₈ square prisms.