Ca (Ni (C N)4) (H2 O)5

C₄H₁₀CaN₄NiO₅

Holt, E.Watson, K.J.

Acta Chemica Scandinavica (1-27,1973-42,1988) (1969) 23, 14-28

a=17.185Å   b=18.859Å   c=6.774Å

α=90°   β=90°   γ=90°