AM_Annabergite Formula: (Ni2.64 Mg.36) As2 O16 H16 Name: Annabergite Unit cell: 10.179 13.309 4.725 90.0 105.0 90.0 , V=618.30 Space group: C12/M1 (12)

Wildner M , Giester G , Lengauer C L , McCammon C A , European Journal of Mineralogy , 8 (1996) p.187-192, Structure and crystal chemistry of vivianite-type compounds: Crystal, structures of erythrite and annabergite with a Mossbauer study of erythrite