New phases which contain mixed-valent vanadium; SrV6O11, SrTxV6-xO11 (T=Ti, Cr, Fe) and NaFe3V9O19 were synthesized. Crystal structures of them and NaV6O11 were determined and discussed in comparison with the magnetoplumbite structure. Random cation distributions in SrTxV6-xO11 suggest that AT6O11 phases contain itinerant d-electrons. NaV6O11, SrV6O11 and NaFe3V9O19 were revealed to show spontaneous magnetization.