Nickenichite

As₃Ca_0.41Cu_0.39Fe_0.55Mg_2.45Na_0.76O₁₂

Auernhammer, M.Effenberger, H.Hentschel, G.Reinecke, T.Tillmanns, E.

Mineralogy and Petrology (1993) 48, 153-166

a=11.882Å   b=12.760Å   c=6.647Å

α=90°   β=112.81°   γ=90°