AM_Caledonite_1 Formula: Pb5 Cu2 S3 (O21 C) H6 Name: Caledonite Unit cell: 20.089 7.146 6.56 90.0 90.0 90.0 , V=941.73 Space group: PMN21 (31)

Giacovazzo C , Menchetti S , Scordari F , Acta Crystallographica, Section B , 29 (1973) p.1986-1990, The crystal structure of caledonite, Cu2Pb5(SO4)3CO3(OH)6