Tin (II) sulfide

Tin monosulfide is a non - stoichiometric compound, where 0 <δ <0,00027, dissolves up to 2.7⋅10 ⁻² at.% Sulfur.

There are two modifications of α and β, the transition temperature α → β is 605 ° C, and the ΔH transition α → β is 0.7 kJ / mol.

ΔG formation (α-SnS): −108 kJ / mol.

ΔH sublimation 220 kJ / mol; sublimated without decomposition. The equation of the temperature dependence of the vapor pressure: log p (Pa) = −10600 / T + 12.27.

The linear expansion temperature coefficient is 14.1⋅10 ⁻⁶ K ⁻¹ . Thermal conductivity 0.113 W / (cm · K).

A semiconductor is usually of p type, the effective mass of holes along the axes a, b, c : M _a = M _b = 0.2 m _e , M _c = 1.0 m _e ( m _e is the mass of a free electron ); temperature coefficient ΔE: −4.8⋅10 ⁻⁴ K ⁻¹ .

It is insoluble in water and dilute mineral acids, it dissolves with decomposition in concentrated sulfuric and nitric acids, and in a saturated aqueous solution of ammonium polysulfide it dissolves with the formation of complexes.

Obtained by fusion of stoichiometric tin and sulfur compositions , precipitation of Sn (II) salts from aqueous solutions of H ₂ S in the presence of H ₂ SO ₄ , and the interaction of molten SnCl ₂ with sulfur. Single crystals and epitaxial films are grown by chemical vapor deposition using chemical transport reactions, and single crystals are also grown by directional melt crystallization. SnS is also the weight form in the determination of Sn ²⁺ , a polymerization catalyst used to produce SnO ₂ .

In nature, it is represented by the rare mineral herzenbergite .

Tin monosulfide is used as a semiconductor material for photoresistors and photodiodes .

• Tin disulfide

• An article on tin chalcogenides in the encyclopedia on XuMuK.ru