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RHODIUM (45Rh102.9055)

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Element Description

Occurring native with other platinum group metals, rhodium is the highest in electrical and thermal conductivity. It is silvery-white and has a very reflective surface. Rhodium is very hard, durable, and highly resistant to corrosion. It is harder and has a higher melting point than both platinum and palladium, making it a useful hardening element in alloying.

Property Name Property Value Property Name Property Value
Atomic Code (45Rh102.9055) Electronegativity 2.2Pauling's
CAS # 7440-16-6 Covalent Radius 1.25Angstroms
Vickers Hardness (annealed) 120
Melting Point 1966°C Linear Coefficient of Expansion 8.3x10-6K-1
Boiling Point 3695°C Electrical Resistivity @ 20°C 4.5µΩ-cm
Density 12.41g/cm3 Crystal Structure Cubic, face centered
Themal Conductivity @ 11°C 0.21cal/cm2/cm/s/°C Vapor Pressure @ M.P. 1.0mmHg
Specific Heat @ 0°C 0.059cal/g°C Thermionic Work Function 4.80eV
Heat of Fusion 5.2k-cal/g-atom Young's Modulus of Elasticity 60x106psi
Heat of Vaporization 127k-cal/g-atom Magnetic Susceptibility 0.99x10-6cgs
Atomic Volume 8.3W/D Tensile Strength 110,000psi
First Ionization Energy 178K-cal/g-mole

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