MARTIN HEINRICH KLAPROTH (1743-1817), German chemist, was born at Wernigerode on the 1st of December 1743.
Klaproth was the leading chemist of his time in Germany.
Klaproth, Description de file de Formose, mem.
In the same year as Klaproth detected uranium, he also isolated zirconia or zirconium oxide from the mineral variously known as zircon, hyacinth, jacynth and jargoon; but he failed to obtain the metal, this being first accomplished some years later by Berzelius, who decomposed the double potassium zirconium fluoride with potassium.
In the following year, 1795, Klaproth announced the discovery of a third new element, titanium; its isolation' (in a very impure form), as in the case of zirconium, was reserved for Berzelius.
Klaproth, and especially by Berzelius; these chemists are to be regarded as the pioneers in this branch of descriptive chemistry.
Klaproth and Vauquelin also investigated this earth, but without detecting that it was a complex mixture - a discovery reserved for C. G.
The next discovery, made independently and simultaneously in 1803 by Klaproth and by W.
Klaproth in 1799, is obtained when pure carbon (graphite or charcoal) is oxidized by alkaline permanganate, or when carbon forms the positive pole in an electrolytic cell (Ber., 1883, 16, p. 1209).
Martin Heinrich Klaproth showed the necessity for igniting precipitates before weighing them, if they were not decomposed by this process; and he worked largely with Louis Nicolas Vauquelin in perfecting the analysis of minerals.
Experimental conditions were thoroughly worked out; the necessity of working with hot or cold solutions was clearly emphasized; and the employment of small quantities of substances instead of the large amounts recommended by Klaproth was shown by him to give more consistent results.
Klaproth in the mineral honeystone, which is the aluminium salt of the acid, The acid may be prepared by warming honeystone with ammonium carbonate, boiling off the excess of the ammonium salt and adding ammonia to the solution.
Klaproth had discovered the presence of potassium in leucite and lepidolite, it occurred to L.
In 1789 Klaproth isolated from pitchblende a yellow oxide which he viewed as the oxide of a new metal, which he named uranium, after the newly discovered planet of Herschel.
Independently of him Klaproth in 1793 discovered a new metal in rutile, and called it titanium; he subsequently found that it was identical with Gregor's element.
Klaproth, however, was unable to prepare the pure oxide, which was first accomplished in 1821 by Rose.
The names of their cities can be explained only by reference to Turkish or Ugrian dialects (Klaproth, Mem.
Modern: Klaproth, "Mem.
The metal was detected in the mineral strontianite, found at Strontian in Argyllshire, by Cruikshank in 1787, and by Crawford in 17 9 0; and the discovery was confirmed by Hope in 1792 and by Klaproth in 1793.
Lan guage.Since the year 1820, when Klaproth concluded that the Japanese language had sprung from the Ural-Altaic stock, philologists have busied themselves in tracing its affinities.
Klaproth in 1789 analysed the mineral zircon or hyacinth and found it to contain a new earth, which he called "zirconia."
Klaproth, has no resemblance to the salt described by Pliny.
Klaproth, on the other hand, supposed they were a mixture of Finns and Turks, and the Hungarian traveller Reguli discovered that the tatarized Meshchers of the Obi closely resembled Hungarians.
(Julius Klaproth, Lettre a M.
1297, as Klaproth admits.
Bailak Kibdjaki, also, an Arabian writer, shows in his Merchant's Treasure, a work given to the world in 1282, that the magnetized needle, floated on water by means of a splinter of wood or a reed, was employed on the Syrian seas at the time of his voyage from Tripoli to Alexandria (1242), and adds:"They say that the captains who navigate the Indian seas use, instead of the needle and splinter, a sort of fish made out of hollow iron, which, when thrown into the water, swims upon the surface, and points out the north and south with its head and tail" (Klaproth, Lettre, p. 57).
Klaproth at Berlin.
Klaproth and the German Academy, and by most English chemists except Cavendish, who rather suspended his judgment, and Priestley, who stubbornly clung to the opposite view.
Klaproth in 1803, whilst J.
Du Chinois, par Abel-Remusat, revu et complete par Klaproth et Landresse (Paris, 1836); H.
HEINRICH JULIUS KLAPROTH (1783-1835), German Orientalist and traveller, was born in Berlin on the 11th of October 1783, the son of the chemist Martin Heinrich Klaproth (q.