Classification of Iridium
Elemental Category
Iridium is classified as a metal. It is a transition metal and belongs to the platinum group metals (PGM), alongside elements such as platinum, palladium, rhodium, ruthenium, and osmium.
Physical Characteristics
Color and Luster
Iridium exhibits a distinct silvery-white color. Its surface displays a bright metallic luster, a characteristic common to many metals.
Texture and Hardness
When in its pure form, iridium is known for its extreme hardness. It is also notably brittle, particularly when compared to more malleable or ductile metals, which can make it difficult to fabricate.
State of Matter at Room Temperature
At standard room temperature (approximately 25°C), iridium exists in a solid state.
Thermal Properties
Melting Point
Iridium possesses an exceptionally high melting point. It transitions from a solid to a liquid phase at approximately 2466 °C. This property is crucial for its application in high-temperature environments.
Boiling Point
The boiling point of iridium is also significantly high, reflecting the strong metallic bonds within its structure. It vaporizes at approximately 4428 °C.