Caesium alums nitrate

According to J. M. Ordway, when alkali hydroxide is added to a soln. of chromic nitrate, chromic hydroxide is precipitated. The precipitate appears when more than two-thirds of the acid has been neutralized. This proves that nitric acid can dissolve more chromic hydroxide than eorresponds with the normal nitrate. C. Montemartini and L. Losana studied the e.m.f. of the soln. N. Bjerrum and C. Fourholt determined the masked hydroxide, Cr(H20)e—, by precipitation as caesium alum. With soln. of chromic nitrate they obtained the results indicated in Table V. 

Uses Of the Stassfurt salts.—The magnesium compounds in the Stassfurt salts are used for the preparation of magnesium and of its salts. The potash salts are an essential constituent of many fertilizers used in agriculture, etc. 22 and potassium chloride is the starting-point for the manufacture of the many different kinds of potassium salts used in commerce—carbonate, hydroxide, nitrate, chlorate, chromate, alum, ferrocyanide, cyanide, iodide, bromide, etc. Chlorine and bromine are extracted by electrolysis and other processes from the mother liquids obtained in the purification of the potash salts. Boric acid and borax are prepared from boracite. Caesium and rubidium are recovered from the crude carnallite and sylvite. 

Does Eka-caesium exist — Several considerations point to the possibility of the existence of an undiscovered alkali element, with atomic number 87 and an atomic weight of approximately 224. Diligent search in caesium materials has been made1 for this missing element by fractionation of the nitrate, di-chloriodide, chloride, perchlorate, sulfate, and alums. In every case careful examination of the extreme portions of the material failed to reveal any indication of a new element. If such an element exists, it must belong very definitely to the radioactive series and it may have such a short life period that its detection becomes very difficult. 

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