AM_Portlandite_17 Formula: Ca (O2 H2) Name: Portlandite Unit cell: 3.5844 3.5844 4.8962 90.0 90.0 120.0 , V=54.48 Space group: P-3M1 (164)

Wyckoff R W G , Crystal Structures , 1 (1963) p.239-444, Second edition. Interscience Publishers, New York, New York, Note: cadmium iodide structure