High-pressure synchrotron x-ray diffraction and Raman spectroscopic study of plumbogummite |
(color online) Plumbogummite Crystal structures (Al: magenta; P: green; O: red). Representations of (a) the six Pb sites (gray spheres), each with a 1/6 occupancy, and (b) one of the six Pb sites showing the PbO12 polyhedron. |