Ternary Mercury Research Articles

Li6A17Hg9 (A=Ca, Sr, Yb): Intermetallic Compounds of Mercury with a Zeolite‐Like Topology of Cubic Networks

Amalgams: New ternary mercury intermetallic compounds have interpenetrating networks composed of Hg atoms that define 12-vertex polyhedral cages and enclose clusters of the remaining atoms (see figure). Surprisingly, this structure is related to a zeolite and a ternary chalcogenide.

ChemInform Abstract: Synthesis and Crystal Structure of Hg2V8O20 — The First Ternary Mercury Vanadate with Mixed‐Valent Vanadium (IV/V).

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

Molecular Clusters of Binary and Ternary Mercury Chalcogenides: Colloidal Synthesis, Characterization, and Optical Spectra.

AbstractFor Abstract see ChemInform Abstract in Full Text.

High-pressure study of ternary mercury chalcogenides: phase transitions, mechanical and electrical properties

In this paper investigations of electrical and mechanical properties of ternary mercury chalcogenides Hg1−xCdxSe, HgSe1−xSx, HgTe1−xSx were performed subjected to hydrostatic pressure treatment. The influence of cation and anion substitutions was tested on the electrical resistivity dependence of P and microhardness H values before and after applying pressure P up to 2.3 GPa. The variations of both the start pressure Pt of sphalerite B3 to cinnabar B9 structure transformation and also H as a function of chemical composition were obtained. A macroscopic bending of the samples found after reversible phase transformations suggests the increase of plasticity in the vicinity of phase transition point. The measurements performed have confirmed the sharp variation in both the electrical and volumetric properties of samples at the beginning of B3→B9 phase transition in contrary to slow structural transformations obtained by x-ray and synchrotron investigations.

Molecular Clusters of Binary and Ternary Mercury Chalcogenides: Colloidal Synthesis, Characterization, and Optical Spectra

A series of binary (HgSe) and ternary (HgSe1-xSx) mercury chalcogenide clusters are synthesized utilizing a colloidal technique involving the phase separation of metal and chalcogen precursors in the presence of strong Hg(II) coordinating ligands. The clusters vary in size between 2 and 3 nm and possess the cubic zinc blende structure of the bulk. Energy-dispersive X-ray measurements show that the composition of the ternary material can be varied throughout the entire composition range from HgS to HgSe. In all cases, the linear absorption of these binary and ternary species is narrow with well-resolved transitions at both the band edge and at higher energies. Complementary band edge emission is also observed with no apparent deep trap emission. Size- and composition (x)-dependent optical properties of these clusters are investigated using photoluminescence (PL) and photoluminescence excitation (PLE) spectra. In the case of HgSe clusters, the size-dependent behavior of up to four excited states is followed. For HgSe1-xSx clusters, where x varies from 0 to 1, a size/composition-dependent progression of up to five excited states is observed.

Structural study of ternary mercury chalcogenides at high pressures

The structure of ternary mercury chalcogenides HgSe1-xSx (x=0.3,0.5,0.6) and HgTe1-xSx (x=0.15) was studied by means of powder neutron diffraction at pressures up to 8 GPa. A phase transition from the zinc blende cubic structure to the hexagonal cinnabar structure was observed at P≈1 GPa in HgSe1-xSx systems and at P≈1.6 GPa in HgTe0.85S0.15. A coexistence of these two phases was observed in the vicinity to the transition pressure. Lattice parameters and atomic positional parameters for the high-pressure hexagonal phase were determined.

Neutron diffraction study of the pressure-driven structural transition in the HgTe0.85S0.15 ternary compound

The structure of the HgTe0.85S0.15 ternary mercury compound was studied by neutron diffraction at high pressures of up to 40 kbar. A phase transition from the cubic (sphalerite-type) to the hexagonal (cinnabar-type) structure was established to occur with increasing pressure and to be accompanied by an abrupt change in the unit-cell volume and interatomic distances. The unit cell parameters, the positions of the Hg and Te/S atoms in the hexagonal cinnabar phase, and their pressure dependences were found.

Binary and Ternary Mercury Chalcogenide Quantum Dots and Clusters

ABSTRACTThis paper describes the synthesis, characterization and optical properties of binary and ternary mercury chalcogenide quantum dots and clusters. Such materials were made by applying a synthetic strategy involving the simultaneous use of strong Hg(II) coordinating ligands and the explicit phase separation of both metal and chalcogen precursors. High quality QDs and clusters are obtained in this manner with sharply structured absorption and band edge emission covering the visible to near infrared.

Neutron diffraction investigation of the structural transition in HgSe1−x Sx ternary mercury chalcogenide systems at high pressures

The structure of HgSe1−xSx ternary mercury chalcogenides at high pressures up to 35 kbar is investigated by neutron diffraction. It is found under pressure, that the HgSe1−xSx compounds undergo, a phase transition from the cubic sphalerite-type to the hexagonal cinnabar-type structure, which is accompanied by a jump-wise change in the unit cell volume and interatomic distances. The unit cell parameters and the positional parameters of Hg and Se (S) atoms in the high-pressure hexagonal phase are determined. A two-phase state is revealed in the phase transition region.