#184
P6cc
Example – AlPO-5, Al(PO4)
An effective harmonic potential for aluminophosphate molecular sieves : application to AlPO4-5
Demontis, P.; Gulin Gonzalez, J.; Suffritti, G.B.; Tilocca, A.; de las Pozas, C.
Microporous and Mesoporous Materials (2001) 42, p103-p111
Al (blue)
P (orange)
AlO4 tetrahedra
PO4 tetrahedra
The Fascination of Crystals and Symmetry 