AM_Calcioaravaipaite Formula: Pb Ca2 Al F9 Name: Calcioaravaipaite Unit cell: 7.722 7.516 12.206 98.86 96.91 90.0 , V=694.76 Space group: C-1 (2)

Kampf A R , Merlino S , Pasero M , American Mineralogist , 88 (2003) p.430-435, Order-disorder approach to calcioaravaipaite, [PbCa2Al(F,OH)9]:, The crystal structure of the triclinic MDO polytype