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stannic sulfide, also known as mosaic gold, is used in making paints for imitation gilding and bronzing on metals, plaster, wood, and paper. It is soluble in aqua regia and hot alkali solution. It is also insoluble in water or dilute acids.
Properties:
Golden leaflets with metallic luster; fatty feel to the touch. It is a yellow, hexagonal, flake-shaped crystal with CdI2 crystal structure and occurs naturally as the rare mineral montmorillonite. It is useful as a semiconductor material with a band gap of about 2.2 eV. It is nontoxic, environmentally friendly, and a two-dimensional van der Waals semiconductor with excellent photoelectric properties. It is also widely used as an absorber layer for solar cells, holographic recording and electrical conversion System materials, and anode materials of Lithium Chemicalbook sub-cells.
Uses:
Mosaic gold is commonly used in gilding and bronzing of metals, plaster, and other non-metallic objects and in decorative coating. It is a common ingredient in many paints. It can be mixed with gypsum and other fillers to produce paints for gold color applications. It is also a component of various alloys for gold color plating and manufacturing, including copper-stannic sulfide, silver-stannic sulfide, and iron-stannic sulfide.
It is prepared by combining high-purity tin with low-purity sulfur and vacuum-smelting it in a heated furnace. It then evaporates to produce a crystalline powder. The powder is then washed, reacted with concentrated hydrochloric acid and re-smelted after cooling. Damp reunion can affect its dispersion performance and using effects, so it should be stored in a dry and cool room.