Figure 1
The crystal structure of gustavite, a monoclinic 4,4L homologue of the lillianite homologous series, viewed along the c axis. M3 is Pb in a bicapped trigonal prismatic coordination, coordination number 8. M1a is Bi, M1b is Ag, M2a is Sb/Bi (Sb is the major component) and M2b is Bi/Sb (Bi is the major component), all in octahedral coordination, coordination number 6. |