Abstract

N uffieldite, a rare bismuth sulfosalt from Alice Arm, British Columbia, is orthorhombic, space group Pbnm, with a = 14.387(7), b = 21.011(15), c = 4.046(6) A, emeas = 7.01(7) g cm-3 and ecal = 7.21 g cm-3 for Z = 4. Intensity data were photographically recorded with an integrating equiinclination Weissenberg camera employing the multiple-film technique, and were measured with the aid of an automated photoscanner. The structure was solved with the symbolic addition procedure and refined, by least-squares techniques, to a disagreement index of 14.10/0. The asymmetric unit of the structure contains 13 atoms: 5 heavy-metal atoms, Cu, and seven S atoms. On the basis of interatomic distances and coordination geometry, Pb and Bi

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