Contractions. - Uran-n. Ur-n.

Present name. - Uranic Nitrate. (U202)" 2N03,6H10.

Nitrate of Uranium.

The metal Uranium is obtained from Pitchblende. The nitrate may be obtained by treating the pure metal or any of its oxides with Nitric Acid.

Characters and Tests. - Lemon-yellow prismatic crystals, efflorescent in dry, and deliquescent in moist air; soluble in water and in alcohol. The aqueous solution gives a yellow precipitate with Ammonia, no blue colour being produced by an excess of the re-agent; a hair-brown precipitate with yellow Prussiate of Potash, and a yellowish-brown precipitate with Sulphide of Ammonium. Sulphuretted Hydrogen causes no precipitate. The solutions of this salt possess the power of lowering the refrangibility of the rays of light which pass through them producing the peculiar phenomenon called fluorescence.

Preparations. - Solution in distilled water for lx, using dilute alcohol for 1, and rectified spirit for all above. Trituration.

N.B. - These should be prepared by artificial light, and preserved in yellow actinic phials.

Reference to Horn. Proving. - B. J. H., xxvi. Hale's New Remedies.

Proper forms for dispensing. - lx to 3, Trituration. lx and 1, Solution. 3x and upwards, Tincture, Pilules, or Globules.