AM_Paracelsian_2 Formula: Ba (Al2 Si2) O8 Name: Paracelsian Unit cell: 9.076 9.583 8.578 90.0 90.0 90.0 , V=746.07 Space group: PNAM (62)

Smith J V , Acta Crystallographica , 6 (1953) p.613-620, The crystal structure of paracelsian, BaAl2Si2O8, Locality: Benallt Mine, near Rhiw, Carnarvonshire, U.K.