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Article
Synthesis and Thermodynamic Functions of Ruthenium Dichalcogenides in a Wide Temperature Range
Thermodynamic properties of polycrystalline powders of ruthenium dichalcogenides have been studied using calorimetric isobaric heat capacity measurements in a wide temperature range. The adiabatic and differen...
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Article
Synthesis and Thermodynamic Functions of Ruthenium Ditelluride
In this paper, we report the synthesis of crystalline ruthenium ditelluride (RuTe2) and its thermodynamic properties in the range from 10 to 965 K, evaluated from its isobaric heat capacity Cp determined using ca...
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Article
Synthesis and Low-Temperature Thermodynamic Functions of Platinum Ditelluride
In this paper, we report the synthesis of crystalline platinum ditelluride, PtTe2, a synthetic analog of the mineral moncheite, and its thermodynamic properties. Using the isobaric heat capacity of PtTe2 determin...
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Article
Cadmium Behavior in Sulfur-bearing Aqueous Environments: Insight from CdS Solubility Measurements at 25–80°C
The present experimental study explores the effects of temperature and sulfur in Cd aqueous geochemistry under reduced conditions. Greenockite CdS solubility is measured in H2O–H2S–HClO4–NaHS solutions at 25–80°C...
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Article
Crossover in Low-temperature Ground State of Fe(Se,Te) Compounds
We present a comparative study of the transport properties of FeSe \({}_{1-x}\) ...
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Article
Open AccessSolubility of Platinum in Pyrite and Pyrrhotite
A temperature range of processes leading to the concentration of Pt in the crust widely varies from high-temperature orthomagmatic to low-temperature hydrothermal and biogenic. Pyrite FeS2 and pyrrhotite Fe1–xS a...
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Article
High-temperature Behavior of PtBi2 and Possibility of Using the Mineral Insizwaite as a Geothermometer
The article presents investigation of polymorphic transformations of the PtBi2 phases that occur during heating in inert atmosphere and in vacuum. A synthetic medium-temperature β-PtBi2 modification corresponding...
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Article
Thermal Transformation of a Synthetic Analogue of Insizwaite PtBi2 on Air
High-temperature transformation of β-PtBi2, a synthetic analogue of insizwaite, was studied under oxidizing conditions (on air). The behavior of the sample upon heating up to 660°C and cooling was studied by diff...
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Article
Impact of Impurity Phases and Superstoichiometric Iron on the Critical Temperature of Iron Chalcogenides
The results of transport and magnetic measurements of iron chalcogenide crystals are analyzed taking into account the data of the chemical composition and impurity phases obtained by means of X-ray diffractome...
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Article
Thermodynamic Properties of AuSb2
We have for the first time determined the temperature dependence of heat capacity for aurostibite, AuSb2, by adiabatic calorimetry and calculated its standard thermodynamic functions in a wide temperature range. ...
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Article
Heat Capacity and Thermodynamic Functions of PdS
The temperature-dependent heat capacity of vysotskite, PdS, has been determined for the first time by adiabatic, relaxation, and differential scanning calorimetry in a wide temperature range and standard therm...
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Article
Thermodynamic Functions of PtS2 in a Wide Temperature Range
The thermodynamic properties of crystalline platinum disulfide have been studied in the range from 5 to 875 K. The isobaric heat capacity of PtS2 has been determined by two methods: by adiabatic calorimetry from ...
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Article
The Synthesis of Crystals of Chalcogenides of K, Zr, Hf, Hg, and Some Other Elements in Halide Melts under Conditions of Stationary Temperature Gradient
The growth of crystals of metals, alloys, chalcogenides, and pnictides in melts of alkali metal halides under conditions of stationary temperature gradient has been studied. The formation of crystals with part...
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Article
Mössbauer Spectroscopy Study of FeSe0.91S0.09 Superconductor Single Crystals
Mössbauer spectra of single crystals of sulfur-doped iron selenide FeSe0.91S0.09 are studied in a wide temperature range, including the vicinity of structural and superconducting transitions. It is found that iro...
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Article
“Invisible” Gold in Synthetic and Natural Arsenopyrite Crystals, Vorontsovka Deposit, Northern Urals
“Invisible” gold in hydrothermal ores is frequently scattered in the most abundant minerals of the Fe–As–S system. It is assumed that “invisible” gold does not incorporate into the mineral structure (nanoscale...
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Article
Short-Lived Electron Excitations in FeTe1 –xSex as Revealed by Microwave Absorption
The Fe1 +yTe1 –xSex single crystals with the various Se/Te ratios were studied by the microwave absorption and direct current resistivity measurements. The comparison of the microwave absorption data and the resi...
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Article
The Se2 (Gas) Fugacity in Systems with Noble Metals: Chrisstanleyite Ag2Pd3Se4 – Naumannite Ag2Se–β-PdSe2 and Luberoite Pt5Se4–Sudovikovite PtSe2
The reactions of 6Ag(cr) + 3PdSe2(cr) = 2Ag2Se(cr) + Ag2Pd3Se4(cr) and 12Ag(cr) + 5PtSe2(cr) = 6Ag2Se(cr) + Pt5Se4(cr) were studied with the EMF method in a completely solid-state galvanic cell with an Ag ion-con...
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Article
Iron and Sulfur Isotope Factors of Pyrite: Data from Experimental Mössbauer Spectroscopy and Heat Capacity
Mössbauer spectra of pyrite (FeS2) are measured within a temperature range of 90–295 K. The isomer shift is described by the Debye model with a Mössbauer temperature θM = 551.4 K. These results are used to calcul...
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Article
Structural Phase Transitions and the Equation of State in SnSe at High Pressures up to 2 Mbar
The crystal structure of tin selenide SnSe has been studied under quasihydrostatic compression at pressures up to 205 GPa created in diamond anvil cells at room temperature. Two structural phase transitions ha...
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Article
Structural phase transitions and the equation of state of SnTe at high pressures up to 2 mbar
Synchrotron X-ray diffraction studies of the structure of SnTe have been performed at room temperature and high pressures under the conditions of quasihydrostatic compression up to 193.5 GPa created in diamond...
