To crystal chemistry of compounds of MHgYX (M = Cu, Ag, Y = S, Se, X = Cl, Br, I)
-
Stanislav V. Borisov
Abstract
In the crystal structures MHgYX (M = Cu, Ag, Y = S, Se, X = Cl, Br, I) and also in CuHg2S2I and Ag2HgSI2 the packing of anions X and Y varies from the hexagonal closest packing (CuHgSI, CuHg2S2I, and α-AgHgSI) to a cubic space-centered packing (Ag2HgSI2, CuHgSBr (295 K), β-AgHgSI, and CuHgSBr (358 K). The packing regularity for large (I–) and smaller (S2–) anions is ensured because Hg2+ has linear coordination S—Hg—S (S—S ≈ 4.5 Å), which is comparable with I—I contacts in a joint close packing. S2–(Se2–) are surrounded in a tetrahedral manner and form stable groups (Hg,M)4Y where the most strong chemical bonds Hg—Y, M—Y, Hg—Hg (∼3.5 Å), Hg—M are concentrated. The chains, layers, and frameworks of (Hg,M)4Y tetrahedra form a “skeleton” and, thus, determine the structure form and the sizes of elementary cells.
© by Oldenbourg Wissenschaftsverlag, München
Articles in the same Issue
- Symmetries of coincidence site lattices of cubic lattices
- About the degree of hydration in potassiumtrisoxalatochromate hydrate
- Structural variations of Cr-doped (Y,REE)AlO3 perovskites
- Structure change of Mn2O3 under high pressure and pressure-induced transition
- To crystal chemistry of compounds of MHgYX (M = Cu, Ag, Y = S, Se, X = Cl, Br, I)
- The crystal structures of solvent-free alkali-metal squarates from powder diffraction data
- PDF from X-ray powder diffraction for nanometer-scale atomic structure analysis of quasicrystalline alloys
- Cu2MnMIVS4 (MIV = Si, Ge, Sn) — analysis of crystal structures and tetrahedra volumes of normal tetrahedral compounds
- Synthesis and crystal structure of a homotrinuclear Ni(II) complex
- Two new mononuclear Ni(II) complexes with reduced ONNO type Schiff base
- The cubic limiting complexes of lattice complexes with trigonal characteristic symmetry
Articles in the same Issue
- Symmetries of coincidence site lattices of cubic lattices
- About the degree of hydration in potassiumtrisoxalatochromate hydrate
- Structural variations of Cr-doped (Y,REE)AlO3 perovskites
- Structure change of Mn2O3 under high pressure and pressure-induced transition
- To crystal chemistry of compounds of MHgYX (M = Cu, Ag, Y = S, Se, X = Cl, Br, I)
- The crystal structures of solvent-free alkali-metal squarates from powder diffraction data
- PDF from X-ray powder diffraction for nanometer-scale atomic structure analysis of quasicrystalline alloys
- Cu2MnMIVS4 (MIV = Si, Ge, Sn) — analysis of crystal structures and tetrahedra volumes of normal tetrahedral compounds
- Synthesis and crystal structure of a homotrinuclear Ni(II) complex
- Two new mononuclear Ni(II) complexes with reduced ONNO type Schiff base
- The cubic limiting complexes of lattice complexes with trigonal characteristic symmetry
