Atomic Weight of Titanium | Commission on Isotopic Abundances and Atomic Weights
| Isotope | Atomic mass (Da) | Isotopic abundance (amount fraction) |
|---|---|---|
| 46Ti | 45.952 627(1) | 0.0825(3) |
| 47Ti | 46.951 7577(8) | 0.0744(2) |
| 48Ti | 47.947 9409(8) | 0.7372(3) |
| 49Ti | 48.947 8646(8) | 0.0541(2) |
| 50Ti | 49.944 7858(8) | 0.0518(2) |
Titanium is an abundant, widely distributed element, yet until 1993, it was the element with the most uncertain atomic weight with U[Ar(Ti)]/Ar(Ti) = 626 parts per million. This situation changed in 1993 when the Commission acknowledged recent mass spectrometric measurements and recommended Ar(Ti) = 47.867(1).
SOURCE Atomic weights of the elements: Review 2000 by John R de Laeter et al. Pure Appl. Chem. 2003 (75) 683-800© IUPAC 2003
CIAAW
Titanium
Ar(Ti) = 47.867(1) since 1993
The name derives from the Latin titans, who were the mythological "first sons of the earth". It was originally discovered by the English clergyman William Gregor in the mineral ilmenite (FeTiO3) in 1791. He called this mineral menachanite and the element menachin, for the Menachan parish where it was found. It was rediscovered in 1795 by the German chemist Martin Heinrich Klaproth, who called it titanium because it had no characteristic properties to use as a name. Titanium metal was first isolated by the Swedish chemists Sven Otto Pettersson and Lars Fredrik Nilson.