Titanium sulphides

Chalcogenides. The crystal structures of titanium sulphides have been reviewed.41 Ti3S8 has several structural features in common with TiS2 including trigonal-prismatic co-ordination polyhedra about S atoms and cubic co-ordination polyhedra about Ti atoms. Whereas six cube faces are shared with trigonal prisms in TiS2 only,... 

Differences between the heats of formation of titanium halide complexes with aliphatic mono- and di-sulphides (n-C3H7) TiX4 (x = 1 or 2 X = Cl or Br) and Bu S(CH2)3SBunTiBr4, in aliphatic and aromatic solvents have been attributed to weak molecular complex formation between the titanium sulphide adduct and the aromatic molecule.178 Variations in the donor ability of the aromatic solvent did not produce any corresponding variation in AH. ... 

The Binary Titanium Sulphides.—The titanium-sulphur system between the composition limits of TiS and TiS2 has long been regarded as a classical point-defect type of non-stoicheiometric phase system. The situation is described in standard texts, such as that of Wells, °° or the review by Wadsley, " and we will survey this historical... 

The crystal structures of modulated materials can be illustrated by reference to the barium iron sulphides of formula BavFe2S4, and the similar strontium titanium sulphides, SrvTiS3. These phases fall into the sub-set of modulated structures called vernier structures, which have two interpenetrating chemical sub-structures. One of these expands or contracts as a smooth function of composition, while the other remains relatively... 

The sulphidation of TiAl in a gas mixture of H2 and H2S formed titanium sulphides on its surface. As a result of this, Al was enriched beneath the... 

If the normal carbonate is used, the basic carbonate or white lead, Pb(OH),. 2PbCO,. is precipitated. The basic carbonate was used extensively as a base in paints but is now less common, having been largely replaced by either titanium dioxide or zinc oxide. Paints made with white lead are not only poisonous but blacken in urban atmospheres due to the formation of lead sulphide and it is hardly surprising that their use is declining. 

Z 1 Niobium 1 Nitrate 1 Osmium 73 a. I Perchlorate Phenols u a o Platinum o 0. 1 5 u 1 Rhodium 1 Rubidium Ruthenium Scandium 1 Selenium Silver I Sodium 1 Strontium 1 Sulphate Sulphides, organic Sulphur dioxide 1 Tantalum 1 Tellurium 1 Thallium Thorium e H 1 Titanium a u ab a 1- I Uranium 1 Vanadium 1 Yttrium 1 Zinc Zirconium... 

Reductant equivalent weights of, 847 Reduction 409 by chromium(II) salts, 409 by hydrogen sulphide, 416 by Jones reductor (zinc amalgam), 410 by liquid amalgams, 412 by silver reductor, 414 by sulphurous acid, 416 by tin(II) chloride, 415 by titanium(II[), 410 by vanadium(II), 410 see also Iron(III), reduction of Reduction potentials 66 Reference electrodes potentials, (T) 554 Relative atomic masses (T) 819 Relative error 134 mean deviation, 134... 

A rapid and clean oxidation of sulphides to sulphoxides can also be carried out using the titanium(III) trichloride/hydrogen peroxide reagent35. On a milimole scale, the oxidation takes place in a time shorter than 20 min upon addition of a solution of hydrogen peroxide to a solution of the sulphide and titanium(III) trichloride in methanol at room temperature. It was suggested that the formation of a sulphoxide in this reaction resulted from a direct coupling of the hydroxy radical with cation radical 20 formed at the sulphur atom of the sulphide (equation 6). 

Potassium sulphide Rhenium (VII) sulphide Silver sulphide Sodium disulphide Sodium polysulphide Sodium sulphide Tin (II) sulphide Tin (IV) sulphide Titanium (IV) sulphide Uranium (IV) sulphide... 

This series of reagents is characterized by the use of metals under the appropriate conditions. In this regard, a mixture of zinc dust and titanium tetrachloride in ether provided a useful synthesis of vinyl sulphides, with the possibility of further substitution alpha to the sulphur atom, as outlined in equation (16). The reaction is easy to carry out and gave yields of 49 to 87%, although the authors do not provide much detail of their experimental procedure and of the purity (chemical or stereochemical) of their products. 

White pigments, some of rather variable composition, that have been used in the past include white lead (Cl Pigment White 1), refractive index 1.9 zinc oxide (Cl Pigment White 4), r.i. 1.9 lithopone (Cl Pigment White 5), r.i. 1.84 zinc sulphide (Cl Pigment White 7), r.i. 2.3 antimony oxide (Cl Pigment White 11), r.i. 2.2. All have been eclipsed by titanium dioxide (Cl Pigment White 6). 

The binary phase diagrams of the titanium oxides and sulphides are very complex with the formation of a very high number of intermediate phases (a similar behaviour is observed also for other intermediate transition metals such as vanadium). In the... 

Bendigo is a classic example of a low-sulphide gold-quartz deposit located in a folded sequence of sandstone and shale of the Cambrian-Ordovician age (Ramsay et al. 1998 Goldberg et al. 2007). Regional soil geochemistry covers an area of 4,000 km. Sampling Grid 5x5 km. 134 samples were collected as can be seen in Fig. 2, titanium anomalies form sub-... 

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