Indium is a soft, white, durable metal, somewhat resembling cadmium, wholly destitute of crystalline structure.
Indium is less volatile than either cadmium or zinc.
The most convenient method of estimating indium is by precipitating it as hydrate with ammonia, dissolving the washed precipitate in hot dilute nitric acid, evaporating, igniting, and weighing the oxide thus obtained.
Indium is completely precipitated from a solution of its acetate, as well as from neutral solutions of its salts in general, by sulphuretted hydrogen.
The following process for the detection of indium in zinc-blende, and its extraction from the same source, is given by Winkler.
The following is the process given by the authors:--The blende of Bendsberg is pulverised and then roasted in a Perret furnace, by which treatment the greater part of the indium is volatilised.
Ammonia, neutral sodium carbonate, and acid sodium carbonate, throw down white precipitates insoluble in excess of the precipitant; caustic potash and soda produce a white precipitate of indium hydrate, soluble in excess.
Precipitation with sulphuretted hydrogen does not give exact results on account of the solubility of the indium sulphide.
By once more dissolving in the exactly necessary amount of sulphuric acid, and treating with sulphuretted hydrogen, cadmium, lead, indium and zinc are removed, and the filtrate is then largely diluted with water and boiled.
Boettger's method is to precipitate theindium by zinc, to press the spongy metal so obtained in hot water, then to submit it to pressure in a screw press between filtering paper, and finally to melt it with cyanide of potassium.
Indium forms compounds with bromine, chlorine, iodine, oxygen, and with several of the organic and inorganic acids.
When examined by means of the spectroscope, the flame of indium reveals two brilliant bands--a violet and a blue one.
Thallium discovered by Crookes, and Indium by Reich and Richter.
The complication of three segments of different types in each funnel does not affect the process of breaking up, and indium needs little attention.
Aluminium, gallium and indiumwere examined from this group.
The atomic weight of indium has been determined by C.
The precipitated indium hydroxide is converted into a basic sulphite by boiling with excess of sodium bisulphite, and then into the normal sulphite by dissolving in hot sulphurous acid.
Indium Sulphate, In2(SO4)3, is obtained as a white powder very soluble in water by evaporating the trioxide with sulphuric acid.
Indium is a soft malleable metal, melting at 155 deg.
Indium oxide, In2O3, is a yellow powder which is formed on ignition of the hydroxide.
Indium salts can be recognized by the dark blue colour they give in the flame of the Bunsen burner; and by the white beads of metal and the yellow incrustation formed when heated on charcoal with sodium carbonate.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "indium" in a variety of sentences. We hope that you will now be able to make sentences using this word. Other words: gold; iron; lead; metal; silver
