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Corrections are given for two of the coefficients for the analytical approximations to X-ray scattering factors in Table 2.2B of International Tables for X-ray Crystallography [(1974), Vol. IV. Birmingham: Kynoch press]. For Ru+4 (p. 100), the coefficient b3 should be 0.036495 rather than 0.36495; for Bi+5 (p. 101), the coefficient b2 should be 0.039042 rather than 0.39042.

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