By heating gallium in a regulated stream of chlorine the dichloride GaCl2 is obtained as a crystalline mass, which melts at 164 deg.
Gallium forms colourless salts, which in neutral dilute aqueous solutions are converted on heating into basic salts.
The metal is obtained from zinc blende (which only contains it in very small quantity) by dissolving the mineral in an acid, and precipitating the gallium by metallic zinc.
In neutral solutions, zinc gives a precipitate of gallium oxide.
This precipitate is converted into gallium sulphate and finally into a pure specimen of the oxide, from which the metal is obtained by the electrolysis of an alkaline solution.
The bromide, iodide and sulphate are known, as is also gallium ammonium alum.
The atomic weight of galliumhas been determined by Lecoq de Boisbaudran by ignition of gallium ammonium alum, and also by L.
Gallium crystallizes in greyish-white octahedra which melt at 30.
The gallium salts are precipitated by alkaline carbonates and by barium carbonate, but not by sulphuretted hydrogen unless in acetic acid solution.
Gallium oxide Ga2O3 is obtained when the nitrate is heated, or by solution of the metal in nitric acid and ignition of the nitrate.
The precipitate is dissolved in hydrochloric acid and foreign metals are removed by sulphuretted hydrogen; the residual liquid being then fractionally precipitated by sodium carbonate, which throws out the gallium before the zinc.
It would decompose water at a red heat; gallium readily does this at high temperatures.
The slightly acid liquid is then boiled with much water, and the deposit of sub-salt of gallium thus obtained is dissolved in potash, and the solution subjected to electrolysis, by which means a metallic deposit of gallium is obtained.
Footnote 324: In consequence of this curious propertygallium was first described as a liquid metal.
Gallium also forms an alum consisting of the double sulphate with ammonium.
Chemical reactions of gallium:--The following are the chief reactions of the salts of gallium when in solution.
The precipitate containing the gallium concentrated in a small bulk, is redissolved in acid, and the excess of the latter reagent removed by evaporation, after which it is boiled with much water.
Gallium alum is a beautifully crystalline body, more soluble in cold than in hot water.
It will form an alum isomorphous with common alum, this we have seen gallium does.
The gun you brought in was sold six months ago to Dorn Starret, resident of Ceres and proprietor of a small gallium mine there.
Aluminium, galliumand indium were examined from this group.
In gallium the funnel disappears on the proto level, setting free its two contained segments, each of which forms a cylinder, thus yielding twelve bodies on the proto level.
Antimony follows closely in the track of gallium and indium, the upper ring of spheres being identical.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "gallium" in a variety of sentences. We hope that you will now be able to make sentences using this word.
