AM_Hornesite Formula: (Mg2.484 Ni.516) As2 O16 H16 Name: Hornesite Unit cell: 10.2573 13.4211 4.7526 90.0 105.076 90.0 , V=631.74 Space group: C12/M1 (12)

Rojo J M , Mesa J L , Pizarro J L , Lezama L , Arriortua M I , Rojo T , Materials Research Bulletin , 31 (1996) p.925-934, Spectroscopic and magnetic study of the (Mg,M)3(AsO4)2*8H2O (M = Ni2+, Co2+), arsenates, Locality: synthetic, Note: z(Wat2) corrected