Le tétrabromomercurate(II) de monométhylammonium

Bis(monomethylammonium) tetrabromomercurate, (CH₃NH₃)₂HgBr₄, 2CH₆N⁺.Hg²⁺.4Br⁻, is monoclinic, space group P2₁/c. Unit-cell dimensions are: a = 7.979(4), b = 13.351(4), c = 11.289(4) Å, β = 96.36(2)°, Z = 4, D_m = 3.25, D_x = 3.24 Mgm⁻³. The compound undergoes a phase transition at low temperature. The JCPDS Diffraction File No. of this compound is 33-1997.