ammon it i fer ous

[Eng., ., ammonite, and Lat. fero to bear or carry.] Containing the remains of ammonites. "The ammon it i fer ous beds of the Lias." - Quar. Jour. Geol. Soc . , vol. xvi. (1860), pt. i., p. 375. ăm-mō-ni-ŭm, s . [In Ger., ., ammonium .] Chem. The name given by Berzelius to a supposed monatomic radical (NH4). It is doubtful whether the ammonia salts-as chloride of ammonium, NH4Cl contain this radical, that is, whether N is sometimes a pentatomic element, or the molecule of NH3 is united with the acid, as HCl, by molecular attraction-thus, NH3. HClin the same manner as water of crystallisation is united in certain crystalline salts. At high temperatures this salt is decomposed into NH3 and HCl. The so-called amalgam of mercury and ammonium decomposes rapidly into hydrogen ammonia and mercury. It is formed by placing sodium amalgam in a saturated solution of NH3HCl. It forms a light. bulky, metallic ma . A dark-blue liquid, said to be (NH4) (ammonium), has been formed at low temperature and high pre ure. But many of the salts of ammonium are isomorphous with those of pota ium and sodium. The salts of ammonium give off NH3 when heated with caustic lime or caustic alkali. With platinic chloride they give a yellow precipitate of double platinic ammonium chloride; also with tartaric acid a nearly insoluble white crystalline precipitate of acid tartrate of ammonia. The salts of ammonium leave no residue when heated to redne .