[en] A number of new hexagonal perovskite-like oxides have been obtained by reacting La₄Ti₃O₁₂ and LaTiO₃. Their crystal structure is based on close-packed stacking of LaO₃ layers and can also be described as consisting of blocks of corners-sharing (TiO₆) octahedra perpendicular to the c-axis, separated by layers of vacant octahedra. The first phase, La₅Ti₄O₁₅, corresponds to the 10H polytypoid with a (hccchhccch) sequence along the c-axis. The second phase, La₆Ti₅O₁₈, corresponds to the 18R polytypoid with a (hcccch)₃ stacking of the LaO₃ layers. La₉Ti₇O₂₇ belongs to the 54R polytipoid with a (hccchhcch)₆ layers stacking. The structure consists of an alternating sequence of La₅Ti₄O₁₅ and La₄TiO₁₂ blocks along the c-axis and thus can be considered as a regular intergrowth between these two phases. The main feature of these new phases is that in each structural unit one of the possible octahedral positions remains unoccupied. These results have been confirmed by refinement of powder XRD data as well as by electron microscopy (SAED, HRTEM) methods