A new compound with the formula Cu 13 Fe 4 V 10 O 44 has been obtained as a result of a solid-state reactions occurring during heating the mixtures both of oxides: CuO, V 2 O 5 , Fe 2 O 3 and vanadates: Cu 5 V 2 O 10 , Cu 3 Fe 4 V 6 O 24. The DTA measurements were used to choose the heating temperatures as well as for determination of thermal stability of the new compound. Cu 13 Fe 4 V 10 O 44 melts incongruently at 790 ± 5°C. The new phase crystallizes in the monoclinic system. The indexing results and the calculated unit cell parameters for Cu 13 Fe 4 V 10 O 44 are given. Its infra-red spectrum and image obtained by means of an electron scanning microscope are presented.