Abstract—During crystal chemical analysis of about fifty mercury-containing compounds the atomic groups same from structure to structure were found. Such atomic groups, namely [Hg4O] oxo-centered tetrahedron and r-octahedron [Hg6O2], are covalently bonded. Quantum-chemical calculations prove stability of these ‘rigid’ atomic groups that are assumed to be formed in the beginning of crystallization. Thus, mechanism of crystallization proposed includes mutual arrangement of isolated or joint-like linked rigid atomic groups and finally their regular packing. At that point symmetry of these rigid atomic groups becomes subgroup of space group of the whole structure.

Index Terms—Crystal structure, mercury, minerals, coordination.

V. V. Atuchin is with the Laboratory of Optical Materials and Structures, Institute of Semiconductor Physics, SB RAS, Novosibirsk, 630090, Russia(e-mail: atuchin@thermo.isp.nsc.ru).
S. V. Borisov is with the Laboratory of Crystal Chemistry, Institute of Inorganic Chemistry, SB RAS, Novosibirsk, 630090, Russia (e-mail: borisov@niic.nsc.ru).
S. A. Magarill is with the Laboratory of Crystal Chemistry, Institute of Inorganic Chemistry, SBRAS, Novosibirsk, 630090, Russia (e-mail: svetlana@niic.nsc.ru).
N. V. Pervukhina is with the Laboratory of Crystal Chemistry, Institute of Inorganic Chemistry, SB RAS, Novosibirsk, 630090, Russia (e-mail: pervukh@niic.nsc.ru).

Cite: Victor V. Atuchin, Stanislav V. Borisov, Svetlana A. Magarill, and Natalia V. Pervulhina, "Rigid Covalent Atomic Groups in Precrystallization Phase for Hg-containing Compounds," International Journal of Applied Physics and Mathematics  vol. 1, no. 2, pp. 88-91 , 2011.