Richter in 1863, and of gallium, detected in certain zinc blendes by Lecoq de Boisbaudran in 1875.
Other elements predicted and characterized by Mendeleeff which have been since realized are gallium, discovered in 1875, and germanium, discovered in 1885 by Clemens Winkler.
Rubidium, caesium, thallium, indium and gallium were first discovered by means of this instrument; the study of the rare earths is greatly facilitated, and the composition of the heavenly bodies alone determinable by it.
These three he called ekaboron, ekaaluminium, and ekasilicon; and his prophecy was completely vindicated within fifteen years by the discovery of gallium in 1871, scandium in 1879, and germanium in 1886.
C. Eaton, Pellaea densa, Hook, Gallium kamtschaticum, Sletten.
The elements gallium and indium were discovered in blende.
GALLIUM (symbol Ga; atomic weight 69.9), one of the metallic chemical elements.
The chief chemical and physical properties of gallium had been predicted many years before by D.
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. 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. 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.
Gallium crystallizes in greyish-white octahedra which melt at 30.15° C. to a silvery-white liquid.
The atomic weight of gallium has been determined by Lecoq de Boisbaudran by ignition of gallium ammonium alum, and also by L.
Gallium forms colourless salts, which in neutral dilute aqueous solutions are converted on heating into basic salts.
The gallium salts are precipitated by alkaline carbonates and by barium carbonate, but not by sulphuretted hydrogen unless in acetic acid solution.
In neutral solutions, zinc gives a precipitate of gallium oxide.
By heating gallium in a regulated stream of chlorine the dichloride GaC1 2 is obtained as a crystalline mass, which melts at 164° C. and readily decomposes on exposure to moist air.
It forms very deliquescent long white needles melting at 75.5° C. and boiling at 215-220° C. The bromide, iodide and sulphate are known, as is also gallium ammonium alum.
Gallium is best detected by means of its spark spectrum, which gives two violet lines of wave length 4171 and 4031.
But it is evident that the local particularism of the Lebanon was adverse to this union, and that even Gregory XIII., who sent the gallium to the patriarch Michael, and Clement VII.
INDIUM (symbol In, atomic weight 114.8), a metallic chemical element, included in the sub-group of the periodic classification of the elements containing aluminium, gallium and thallium.
It was a rule of the church that the consecration of metropolitans could not be completed without their receiving the gallium from the hands of the pope.
The meadows are clothed with a rich vegetation - numberless Paeoniae, Scabiosae, Convolvulaceae, Campanulae, Eremurus, Umbelliferae, Gallium, Rosaceae, Altheae, Glycyrrhizae, Scorodosma foetida and Gramineae.
Gallium oxide Ga203 is obtained when the nitrate is heated, or by solution of the metal in nitric acid and ignition of the nitrate.
6), after receiving the gallium in Rome, Manning began his work as archbishop by devoting himself especially to the religious education of the poor and to the establishment of Catholic industrial and reformatory schools.