The title compound, (C5H12N)(2)[HgCl4], contains piperidinium cations
and tetrachloromercurate anions, which are connected by N-H ... Cl bon
ds via the C11, C12 and C13 atoms into a two-dimensional network in th
e ((1) over bar 01) plane through the origin. The Hg-Cl bond lengths l
ie between 2.431 (3) and 2.515 (2) Angstrom.