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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|
|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|