Classification of Gadolinium
Gadolinium (Gd), atomic number 64, is classified as a metal. It is a member of the lanthanide series, a group of elements also known as rare-earth metals. These elements possess distinct properties that make them valuable in various high-technology applications.
Physical Characteristics
Color and Appearance
Gadolinium typically appears as a silvery-white metal. When its surface is freshly cut or polished, it exhibits a characteristic metallic luster. However, upon prolonged exposure to air, it slowly tarnishes due to oxidation, forming a duller surface layer.
Texture and Malleability
The texture of Gadolinium is relatively soft. It is both malleable, meaning it can be hammered or pressed into thin sheets without breaking, and ductile, indicating it can be drawn into wires. These properties are typical of many metals.
State of Matter
At standard room temperature (approximately 25 °C and 1 atmosphere pressure), Gadolinium exists in a solid state.
Thermal Properties
Melting Point
Gadolinium has a melting point of approximately 1312 °C. This relatively high temperature is characteristic of many transition and rare-earth metals, requiring significant energy input to convert from a solid to a liquid state.
Boiling Point
The boiling point of Gadolinium is approximately 3273 °C. This exceptionally high temperature indicates that it requires an immense amount of thermal energy to transition from a liquid to a gaseous state.