AM_Portlandite
Formula: Ca O2 H2
Name: Portlandite
Unit cell: 3.585 3.585 4.871 90.0 90.0 120.0 , V=54.22
Space group: P-3M1 (164)

Henderson D M , Gutowsky H S , American Mineralogist , 47 (1962) p.1231-1251, A nuclear magnetic resonance determination of the hydrogen positions in Ca(OH)2, T = -190 C