AM_Szymanskiite Formula: Hg8 (Ni2.04 Mg.96) O29.4 C6 Name: Szymanskiite Unit cell: 17.3984 17.3984 6.0078 90.0 90.0 120.0 , V=1574.94 Space group: P63 (173)

Szymanski J T , Roberts A C , The Canadian Mineralogist , 28 (1990) p.709-718, The crystal structure of szymanskiite, a partly disordered (Hg-Hg)2+,, (Ni,Mg)2+ hydronium-carbonate-hydroxide-hydrate