Gold(III) chloride is monoclinic, in space group P2/sub 1//c, with cell dimensions a = 6.57, b = 11.04, c = 6.44 A, and BETA plus or minus 113.3 deg . The atomic positions were determined by Patterson and electron-density projections and were refined by Fourier and least-squares methods with three- dimensional data. The structure consists of plana molecules Au/sub 2/Cl/sub 6/ (at centers of symmetry) in which each Au has four Cl neighbors at 2.23 and 2.25 A (terminal Cl) and 2.33 and 2.34 A (bridge Cl), each plus or minus 0.02 A. Gold scattering factors in the leastsquares refinement were modified for dispersion with little effect on coordinates but with appreciable effect on temperature and scale factors. (auth)
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Clark et al. (1958) studied this question.