Single-phase crystalline fine particles of(CrxV1-x)(2)O-3 have been synthesized by a vapor-phase explosive reaction of a gas mixture of CrO2Cl2 + VOCl3 + H-2 + O-2 induced by a single laser pulse. The distribution of particle size was uniform with a mean particle size of 80 nm. Lattice constants of (CrxV1-x)(2)O-3 (x = 0 - 1) were accurately determined by the whole-powder-pattern decomposition (WPPD) method. A sharp increase in the a axis-length and a sharp decrease in the c axis-length of the hexagonal unit cell of the oxide (x = 0.03) have been observed. The crystal structures of (CrxV1-x)(2)O-3 (x = 0.15, 0.5, 0.7) were studied by Rietveld analysis.