To surrender or relinquish, as sovereign power; to withdraw definitely from filling or exercising, as a high office, station, dignity; as, to abdicate the throne, the crown, the papacy. [imp. & p. p. Abdicated ( ); p. pr.
History of IR and FTIR spectroscopy. Chemical IR spectroscopy was emerged as a science in 1800 by Sir William Herschel. Firstly most IR instrumentation was based on prism or grating monochromators. Michelson invented interferometer in 1881.
Iridium is a chemical element with symbol Ir and atomic number 77.  It is a very hard, brittle, silvery-white transition metal of the  platinum family.2 people found this useful. Edit.ridium was discovered in 1803 among insoluble impurities in natural platinum. Smithson Tennant, the primary discoverer, named the iridium for the goddess Iris, personificatio â¦ n of the rainbow, because of the striking and diverse colors of its salts.