Abstract. NH4CdC13, orthorhombic, Pmnb, a = 3.994 (1), b = 9.026 (3), c = 14.938 (4) A; Z = 4; D m = 2.87, D c = 2.92 g cm-3; /t(Mo K~) = 53.1 cm-1; F(000) = 440; ~.(Mo K~) = 0.70926 A. The structure has been refined by blocked least-squares methods to an R of 0.038 for 759 observed reflections. Our results confirm the earlier structure but give interatomic distances and angles with greater accuracy. Anisotropic temperature factors were introduced and all hydrogen atoms were located.

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