Hexagonal Barium titanate powder, generating method therefor, dielectric ceramic composition and e

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Dielectric ceramic composition includes a hexagonal type barium titanate as a main component shown by a generic formula of (Ba1-alphaMalpha)A(Ti1-betaMnbeta)BO3 and having hexagonal structure wherein an effective ionic radius of 12-coordinated "M" is -20% or more to +20% or less with respect to an effective ionic radius of 12-coordinated Ba2+ and the A, B, alpha and beta satisfy relations of 1.000<(A/B)@1.040, 0@alpha<0.003, 0.03@beta@0.2, and as subcomponents, with respect to the main component, certain contents of alkaline earth oxide such as MgO and the like, Mn3O4 and/or Cr2O3, and CuO and Al2O3 and rare earth element oxide and glass component including SiO2. According to the present invention, it can be provided the hexagonal type barium titanate powder and the dielectric ceramic composition which are preferable for producing electronic components such as a capacitor and the like showing comparatively high specific permittivity, having advantageous insulation property and having sufficient reliability.