Figure 2
(a) Representation of a unit cell of 1 with M6 and P6 shown in green and red, respectively. (b) Illustration showing the arrangement of M6 (green balls) and P6 (red balls) in a unit cell with intertwisted M6- and P6-tetrahedron arrangements. (c) Illustration showing the arrangement of four M6 tetrahedrons at four vertexes of a P6 tetrahedron. |