21109-95-5

Usage

Safety Profile

A poison. Flammable byspontaneous chemical reaction, air, moisture, or acidfumes may cause it to ignite. For explosion and disasterhazards, see SULFIDES. To fight fire, use CO2, drychemical. Reacts violently with phosphorus(V) oxide.Mixtures with lea

InChI:InChI=1/Ba.S/q+2;-2

Upstream product

• 7440-39-3 barium 
• 10544-50-0 sulfur 
• 7783-06-4 hydrogen sulfide 
• 1333-74-0 hydrogen 
• 7757-82-6 sodium sulfate 
• 2092-17-3 barium thiocyanate 
• 7704-34-9 sulfur 
• 75-15-0 carbon disulfide 
• 7439-89-6 iron 
• 7789-78-8 calcium hydride 
• 34557-54-5 methane 

Downstream Products

• 7558-02-3 potassium bromide 
• 1313-82-2 sodium sulfide 
• 7704-34-9 sulfur 
• 5908-82-7 barium thiocyanate trihydrate 
• 22541-12-4 barium(II) 
• 5908-64-5 barium acetate trihydrate 
• 7727-37-9 nitrogen 
• 26041-18-9 sulfide ion 

Relevant academic research and scientific papers

Crystal structure and physical properties of Ba2Nb3S8I: A new misfit-layered transition-metal dichalcogenide superconductor

Single crystals of Ba2Nb3S8I have been grown using iodine-vapor transport in fused-quartz tubes. The crystals form as flakes with typical areas of 5–10 mm2 and thicknesses of 5–11 μm. The crystal structure was determined using single-crystal x-ray diffraction with the aid of an APEX II CCD diffractometer. The structure shows trigonal symmetry with space group P31c and lattice parameters a = b = 10.0156(5) ? and c = 25.1414(15) ?. Compositional analysis via x-ray spectroscopy confirms the presence of iodine. Superlattice reflections are evident in x-ray precession images. Measurements of the electrical resistivity reveal a metallic temperature dependence and superconductivity near 1 K. Polycrystalline samples of Ba2Nb3S8I were made in order to have samples large enough for other bulk physical properties measurements. Magnetic susceptibility reveals antiferromagnetism below 275 K. The coexistence of antiferromagnetism and superconductivity is surprising. Specific heat measurements reveal the electronic coefficient γ = 3.95(66) mJ/mol K2. The jump in the specific heat at the superconducting transition temperature Tc (ΔC/γTc = 1.4(2)) and the energy gap associated with the superconducting state (Eg = 0.405(17) meV) agree well with BCS theory.

High pressure phase of Ba2FeS3: An antiferromagnet with one-dimensional spin chains

In this work, we report on the discovery of the high-pressure phase of Ba2FeS3 with quasi one-dimensional (1D) spin chains, which was synthesized under high-pressure and high-temperature conditions. A systematic study was carried out via structural, transport, magnetic and thermodynamic measurements. The high-pressure phase of Ba2FeS3 (denoted by Ba2FeS3 (HP)) crystallizes in a K2AgI3-typed orthorhombic structure with the space group of Pnma (62) and the lattice parameters of a = 8.6831 (1) ?, b = 4.2973 (1) ?, and c = 17.0254 (2) ?, respectively, which consists of chains of corner-sharing FeS4 tetrahedra along the b axis. Ba2FeS3 (HP) undergoes a long-range antiferromagnetic transition at TN ～56 K, above which the magnetic susceptibility curve exhibits a round hump behavior with the maximum temperature Tmax ～110 K. In addition, the intrachain coupling Jintra is about ?18 K obtained by using the Wagner-Friedberg model. The specific heat data suggest that the total magnetic entropy change ΔS caused by the long-range ordering transition is only ～20% of the expected value for a S = 2 system. For comparison, the properties of K2CuCl3-typed Ba2FeS3 with similar quasi 1D spin chains were presented as well. Our results indicate that both compounds exhibit a typical feature expected for compounds with 1D spin chains.

Thermal reduction of barium sulphate with carbon monoxide-A thermogravimetric study

The kinetic parameters of the reduction of barium sulphate to barium sulphide using carbon monoxide fractions of 2.4-9.6% and temperatures of 850-1000 °C, using an isothermal thermogravimetric method, were obtained. This reaction has shown to be temperature and carbon monoxide concentration dependent. By variation in temperature, at constant CO fractions, an average activation energy of 149 (±10) kJ/mol was observed. By changing the CO fraction at constant temperature, it is suggested that the reduction reaction is first order in CO. An overall reaction rate equation is proposed.

Synthesis, Structure, and Optical Properties of Antiperovskite-Derived Ba2MQ3X (M = As, Sb; Q = S, Se; X = Cl, Br, I) Chalcohalides

Six isostructural antiperovskite-derived chalcohalides, Ba2MQ3X (M = As, Sb; Q = S, Se; X = Cl, Br, I), crystallizing in the space group Pnma, have been synthesized by solid-state reactions. The crystal structure features a 3D framework with the [XBa5]9+ disordered square pyramids as building blocks and [MQ3]3- units filling the interspace. [XBa5]9+ disordered square pyramids are edge-sharing along [010], derived from the fusing of the two pyramids in octahedral [XBa6]11+. Surprisingly, Ba2AsS3X (X = Cl, Br, I) show almost the same optical band gap of 2.80 eV, and Ba2AsSe3X (X = Br, I) also have a similar band gap of 2.28 eV. The optical band gap of Ba2SbS3I is 2.64 eV. First-principles calculations reveal that the optical absorption is attributed to the transitions between Q np at the valence band maximum (VBM) and M np-Q np at the conduction band minimum (CBM). These compounds also possess interesting photoluminescence properties with splitting emission peaks on excitation at 200 nm.

Structure of Ba2Cu3 S2[VS4], a new alkaline-earth copper thiovanadate

The new barium copper(I) sulfide tetrathiovanadate(V), Ba2Cu3S2[VS4], was obtained as a by-product of the reaction of BaS with sulvanite (Cu3VS4). The compound crystallizes monoclinically in the space group C2/c (No. 15), with four formula units in the unit cell, a=15.135(2) A, b=8.930(1) A, c=10.738(2) A and β=133.73(1)○. In the structure, infinite double-chains of condensed CuS4 and VS4 tetrahedra are running along [001]. The barium cations are located between the chains at the centers of tricapped trigonal prisms of sulfur atoms.

OPTICAL PROPERTIES OF ALKALINE-EARTH CHALCOGENIDES. II. VACUUM ULTRAVIOLET REFLECTION SPECTRA IN THE SYNCHROTRON RADIATION REGION OF 4-40 ev.

The reflectivity spectra have been measured on single crystals of CaO, CaS, SrO, SrS, SrSe, BaO, BaS and BaSe in the synchrotron radiation region of 4-40 ev. In order to prevent surface deterioration effect, all measurements have been made at 77 K on the fresh (100) surfaces cleaved within a high vacuum. From a chemical trend of the spectra, the observed spectral features are classified into two groups, the interband and band-exciton transitions in the lower energy regions, and the core-excitons in the higher energy region.

Vertex-linked ZnO2S2 tetrahedra in the oxysulfide BaZnOS: A new coordination environment for zinc in a condensed solid

The wide-band-gap semiconductor BaZnOS adopts a high-symmetry modification of the SrZnO2 structure type and contains layers of vertex-linked ZnO2S2 tetrahedra, which represent a novel coordination environment for zinc in the solid state. BaZnOS: orthorhombic, space group Cmcm; a = 3.9619(2) A, b = 12.8541(7) A, c = 6.1175(4) A, Z = 4. Diffuse-reflectance spectroscopy measurements reveal a direct band gap of 3.9(3) eV, consistent with the white color and the results of band structure calculations. The band gap is larger than those observed in ZnO and ZnS, consistent with the more ionic nature of BaZnOS. Attempts to dope this compound electronically have so far not proved possible.

Synthesis and characterization of two lead-containing metal chalcogenides: Ba5Pb2Sn3S13 and Ba6PbSn3Se13

Two new metal chalcogenides, Ba5Pb2Sn3S13 (BPSS) and Ba6PbSn3Se13 (BPSSe), were successfully synthesized in vacuum–sealed silica tubes for the first time. Both of them are isostr

Catalytic effect of zinc oxide on the reduction of barium sulfate by methane

Reduction of barium sulfate by methane was investigated in this work. The thermogravimetric method was used to obtain kinetic parameters of the reaction in the temperature range of 900-975 °C at atmospheric pressure. The kinetics of the reaction has been studied both in the absence and presence of zinc oxide as a catalyst. The conversion-time data have been interpreted by using the grain model, and the effect of catalyst on the kinetic parameters has been elucidated. It was found that zinc oxide acted as fairly strong catalyst for the reaction, especially at higher temperatures. At about 975 °C the reaction rate constant was increased more than 7 times by using 2% of zinc oxide. This enhancement in the rate constant is valuable for industries.

Layered compounds BaM2Ge4Ch6 (M = Rh, Ir and Ch = S, Se) with pyrite-type building blocks and Ge-Ch heteromolecule-like anions

The structures and chemical features of layered compounds BaM 2Ge4Ch6 (M = Rh, Ir; Ch = S, Se) synthesized by high-pressure and high-temperature methods have been systematically studied. These compounds crystallize in an o