Platinum (disambiguation)
Platinum is a chemical element with symbol Pt and atomic number 78.
Synthesis of precious metals
The cost of platinum as of October 2014 was $39,900 per kilogram, making it equally as expensive as rhodium. Iridium, by contrast, has only about half the value of platinum ($18,000/kg). Iridium has two naturally occurring isotopes, Ir and Ir. Irradiation by slow neutrons would transmute these isotopes into Ir and Ir, with short half-lives of 73 days and 19 hours, respectively; the predominant decay pathway for both of these isotopes is beta-minus decay into Pt and Pt.