Symbol
Ir
Atomic Number
77
Atomic Mass
192.217
Protons
77
Neutrons
115
Electrons
77
Type
Transition Metal
Isotopes
Iridium-191, Iridium-193
Discovery Year
1803
Discovered By
William Hyde Wollaston
Group
9
Period
6
Boiling Point
6637°F
Melting Point
6650°F
Electron Configuration
[Xe] 6s² 4f¹⁴ 5d⁷
Density (g/cm³)
22.56
Crystal Structure
Cubic
Magnetism
Paramagnetic
Abundance in Earth's Crust
0.0001%
Phase at Room Temperature
Solid