Beschreibung:
<jats:p>Two new titanates of strontium, lithium and a <jats:italic>3d</jats:italic> metal, with the composition SrLi<jats:italic>M</jats:italic>Ti<jats:sub>4</jats:sub>O<jats:sub>11</jats:sub> (<jats:italic>M</jats:italic> = Cr, Fe), have been discovered. Single crystals were obtained by spontaneous crystallization from a high-temperature solution with LiBO<jats:sub>2</jats:sub> as the solvent. The structure of SrLiCrTi<jats:sub>4</jats:sub>O<jats:sub>11</jats:sub> was refined in the orthorhombic space group <jats:italic>Pnma</jats:italic> (<jats:italic>Z</jats:italic> = 4), while SrLiFeTi<jats:sub>4</jats:sub>O<jats:sub>11</jats:sub> appeared to adopt a four-times larger orthorhombic unit cell with <jats:italic>Pbcn</jats:italic> (<jats:italic>Z</jats:italic> = 16). The structures can be described by a close-packed arrangement of Sr and O atoms. The unit cell contains six `compact planes' perpendicular to [100] in the layer sequence <jats:italic>ABACBC</jats:italic> [(chc)<jats:sub>2</jats:sub>]. Ti and Cr or Fe atoms occupy some of the interstitial octahedral sites created, whereas Li atoms are in tetrahedral sites. Depending on the synthesis conditions of SrLiCrTi<jats:sub>4</jats:sub>O<jats:sub>11</jats:sub>, the distribution of Cr and Ti atoms on the four possible crystallographic sites is not the same. Having a similar compact-planes sequence, SrLiCrTi<jats:sub>4</jats:sub>O<jats:sub>11</jats:sub> and SrLiFeTi<jats:sub>4</jats:sub>O<jats:sub>11</jats:sub> structures differ in the arrangement of Sr and O atoms per layer of close packing, which also induces a correlated variation in the Li-tetrahedra distribution.</jats:p>