Figure 3
(a) The crystal structure of owyheeite viewed down [100]. Atoms are represented by gray (S), blue (predominant Pb), red (predominant Sb), green (Ag) and orange (putative Cu) spheres of arbitrary radius. Background according to modulation amplitude with respect to the average structure (yellow: <0.10 Å, blue: 0.10–0.24 Å, red: >0.24 Å). Numbering schemes of the (b) S- and (c) M-sites. Slightly more than an asymmetric unit is shown for better orientation. |