Hutchinsonite, TlPbAssSg, M,. = 1074.72, orthorhombic, Pbca, a = 10.786(3) A, b = 35.389(8) A, c = 8.141(3) A, Z = 8, Dx = 4.59 g/cm3, {L(MoK" = 330.60 cm 1, F(OOO) = 3776, locality:: Qilliruvika, Peru. The anisotropic refinement converged to give the value of R = 00.045(wR = 0.046) for 2992 reflections used. The Pb and TI atoms occupy distinct sites M 1 and M2, respectively. The former has sev...