AM_Harmotome_3 Formula: Ba Ca.3 (Al2.48 Si5.52) O22 H12 Name: Harmotome Unit cell: 9.879 14.139 8.693 90.0 124.81 90.0 , V=996.94 Space group: P121/M1 (11)

Rinaldi R , Pluth J J , Smith J V , Acta Crystallographica, Section B , 30 (1974) p.2426-2433, Zeolites of the phillipsite family. Refinement of the crystal structure of, phillipsite and harmotome