YTYAN IRIDIUM, Platinum's twin companion And to which it has a great resemblance,
Is a white and brittle metal that fuses With difficulty in the Compound Blowpipe
J. Carrington Sellars,
Chemistianity, 1873, p-186
Griffith, W.P., Bicentenary of Four Platinum Group Metals, Part II: Osmium and Iridium
– events surrounding their discoveries. In: Platinum Metals Review 48,
4 (October 2004): 182-189 (on-line).
International Platinum Association, Iridium History
Platinum. Gmelins Handbuch der anorganische Chemie,8. Aufl.; System-Nummer
68 (1951), Pt. A. pp. 12-13.
Tennant, Smithson, "On two Metals, found in the black powder remaining after the
solution of Platina." Philosophical Transactions of the Royal Society of London
95 (1805), 411-418
Weeks, Mary Elvira, Discovery of the Elements, comp. rev. by Heny M. Leicester (Easton,
Pa.: Journal of Chemical Education, 1968), pp. 414-418
Greek Mythology: IRIS Goddess of the Rainbow & Messenger of the Gods w/ Pictures
(on-line) (The illustration to the right is from that page).