AM_Xonotlite_3 Formula: Ca6 Si6 O19 H2 Name: Xonotlite Unit cell: 8.712 7.363 14.023 89.99 90.36 102.18 , V=879.26 Space group: A-1 (2)

Kudoh Y , Takeuchi Y , Mineralogical Journal , 9 (1979) p.349-373, Polytypism in xonotlite: (I) Structure of an A-1 polytype, Locality: Heguri, Chiba Prefecture, Japan