AM_Tangeite Formula: (Ca.924 Pb.076) Cu (V.59 As.41) O5 H Name: Tangeite Unit cell: 5.836 7.43 9.347 90.0 90.0 90.0 , V=405.30 Space group: P212121 (19)

Basso R , Palenzona A , Zefiro L , Neues Jahrbuch fur Mineralogie, Monatshefte , 1989 (1989) p.300-308, Crystal structure refinement of a Sr-bearing term related to copper, vanadates and arsenates of adelite and descloizite groups, Locality: Molinello mine, Val Graveglia, Northern Appenines, Eastern Liguria, Italy