Episode 3 of 4

Iridium and Osmium Residues

When
1803 to June 21, 1804
Where
London
Part of
Wollaston, Tennant and Berzelius identify new elements

Tennant analyzed platinum ore residues in 1803, identifying iridium and osmium, documented in 1804.

Smithson Tennant analyzed insoluble residues from platinum ores in 1803, concluding they contained new metals. He identified iridium and osmium, naming osmium for its volatile oxide's smell. The discovery was documented in a letter to the Royal Society on June 21, 1804.

Sources

  1. Iridium Wikipedia, revision of 2026-09-26
  2. Osmium Wikipedia, revision of 2026-09-12

Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.