AM_Cu(HCOO)2_4H2O Formula: Cu C2 O8 H10 Name: Cu(HCOO)2*4H2O Unit cell: 8.15 8.18 6.35 90.0 101.083 90.0 , V=415.44 Space group: P121/A1 (14)

Okada K , Kay M I , Cromer D T , Almodovar I , Journal of Chemical Physics , 44 (1966) p.1648-1653, Crystal structure by neutron diffraction and the antiferroelectric phase, transition in copper formate tetrahydrate