AM_Amstallite Formula: Ca Al1.8 Si3.2 O12.8 Cl.2 H8 Name: Amstallite Unit cell: 18.83 11.517 5.19 90.0 100.86 90.0 , V=1105.37 Space group: C12/C1 (15)

Quint R , Neues Jahrbuch fur Mineralogie, Monatshefte , 1987 (1987) p.253-262, Description and crystal structure of amstallite, CaAl(OH)2[Al0.8Si3.2O8(OH)2]*[(H2O)0.8Cl0.2],, a new mineral from Amstall, Austria, Locality: Amstall, Austria