Ir

Iridium

Atomic Number 77 · Metal bead

The most corrosion-resistant metal known. An iridium-rich layer in rock marks the asteroid impact that killed the dinosaurs.

Atomic Mass

192.22 u

Category

Transition Metal

Phase (STP)

Solid

Density

22.56 g/cm³

Melting Point

2446 °C

Boiling Point

4428 °C

Electronegativity

2.2 (Pauling)

Atomic Radius

135 pm

Electron Configuration

[Xe] 4f14 5d7 6s2

Discovered

1803 — Smithson Tennant

Find Iridium Samples

Sample form: Metal bead

Luciteria Science

Premium element samples in acrylic cubes

Engineered Labs

Element collections and periodic table displays

Various element samples and collections

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