Da, point group

Garner, C. D., Mabbs, F. E. (1970) Studies in eight-coordination. Part I. Crystal field energies in the Das point group. J. Chem. Soc. (A) 1711. 

Reduce the representation. The sums formed in the application of the reduction formula are given in Table 6.6. In this table the symmetry classes that have reducible representation characters of 0 are omitted as they will not contribute to the totals in any irreducible representation. The order of the Da point group h = 8, so that the reduction process yields... 

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