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One of the rare earth elements, yttrium is found in nearly all rare earth minerals. It is also quite prevalent in lunar rock samples. Yttrium is a lustrous, silvery-to-dark gray metal that darkens with exposure to light. It's solid form is relatively stable in air. Melting Point 1522°C Boiling Point 3338°C Density 4.47g/cm 3 Themal Conductivity 0.035cal/cm 2/cm/s/°C Specific Heat @ 27°C 0.071cal/g°C Heat of Fusion 2.7k-cal/g-atom Heat of Vaporization 93k-cal/g-atom Atomic Volume 19.8W/D First Ionization Energy 152K-cal/g-mole Electronegativity 1.3Pauling's Covalent Radius 1.62Angstroms Electrical Resistivity @ 298°C 59.6µΩ-cm Crystal Structure Hexagonal Compressibility 2.68x10 -6cm 2/kg Thermal Neutron Cross Section 1.27barns/atom Magnetic Moment 0.67Bohr magnetons Magnetic Susceptibility 191x10 -6emu/mole Tensile Strength 22,00psi
Yield Strength 9,700psi Transformation Temperature 1479°C