The crystal structure of Hg(OH)NO3 has been determined by x-ray diffraction method using 570 independent three-dimensional intensity data obtained by photographic technique. The crystals are monocliinc with a = 6.57 ± 0.01 Å, b = 7.19 ± 0.01 Å, c = 7.83 ± 0.01 Å, β = 115° 40′ ± 10′ and 4 formula units per unit cell. The space group is P21/c – C2h5. The refinement yielded an R value of 8.1% for observed reflections. The mercury and oxygen atoms (of OH groups) form infinite planar –Hg–O–Hg–O– zig-zag chains running parallel to the b axis. Within the chain the Hg–O distances are 2.031 ± 0.034 Å and 2.054 ± 0.033 Å and suggest a covalent bond. The angles Hg–O–Hg and O–Hg–O are 123.9 ± 1.3° and 171.5 ± 0.9° respectively. The zig-zag chains built a layer parallel (100). Between two layers is a layer of nitrate groups. The layers are linked together by weak Hg–O bonds of 2.659 Å.
Zeitschrift für Kristallographie – Crystalline Materials offers a place for researchers to present results of their crystallographic studies. The journal includes theoretical as well as experimental research. It publishes Original Papers, Letters and Review Articles in manifold areas of crystallography.