| Praseodymium, Pr | |
|---|---|
| Categories: | MetalNonferrous MetalPure Element |
| Material Notes: | Physical Form: Silver-Metal; Hexagonal |
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Export data to your CAD/FEA program| Physical Properties | Metric | English | Comments | ||
|---|---|---|---|---|---|
| Density | 6.77 g/cc | 0.245 lb/in³ | |||
| Chemical Properties | Metric | English | Comments | ||
| Atomic Mass | 140.9077 | 140.9077 | 140.90765 – 1995 | ||
| Atomic Number | 59 | 59 | |||
| X-ray Absorption Edge | 0.29517 Å | 0.29517 Å | K | ||
| 1.81307 Å | 1.81307 Å | LI | |||
| 1.92305 Å | 1.92305 Å | LII | |||
| 2.07707 Å | 2.07707 Å | LIII | |||
| Electronegativity | 1.13 | 1.13 | Pauling | ||
| Ionic Radius | 0.900 Å | 0.900 Å | Crystal Ionic Radius for Valence +4 | ||
| 1.013 Å | 1.013 Å | Crystal Ionic Radius for Valence +3 | |||
| Mechanical Properties | Metric | English | Comments | ||
| Hardness, Vickers | 20 | 20 | |||
| Tensile Strength, Ultimate | 110 MPa | 16000 psi | |||
| Tensile Strength, Yield | 100 MPa | 14500 psi | |||
| Elongation at Break | 15 % | 15 % | |||
| Tensile Modulus | 37.3 GPa | 5410 ksi | |||
| Bulk Modulus | 28.8 GPa | 4180 ksi | |||
| Poissons Ratio | 0.281 | 0.281 | |||
| Shear Modulus | 14.8 GPa | 2150 ksi | |||
| Electrical Properties | Metric | English | Comments | ||
| Electrical Resistivity | 0.0000680 ohm-cm | 0.0000680 ohm-cm | |||
| Magnetic Susceptibility | 0.0000378 | 0.0000378 | cgs/g | ||
| Thermal Properties | Metric | English | Comments | ||
| Heat of Fusion | 48.0 J/g | 20.6 BTU/lb | |||
CTE, linear  | 4.50 µm/m-°C @Temperature 20.0 °C | 2.50 µin/in-°F @Temperature 68.0 °F | alpha phase along a-axis | ||
| 11.2 µm/m-°C @Temperature 20.0 °C | 6.22 µin/in-°F @Temperature 68.0 °F | alpha phase along c-axis | |||
| Specific Heat Capacity | 0.1519 J/g-°C | 0.03631 BTU/lb-°F | Gas | ||
| 0.200 J/g-°C | 0.0478 BTU/lb-°F | ||||
| Thermal Conductivity | 11.7 W/m-K | 81.2 BTU-in/hr-ft²-°F | |||
| Melting Point | 927 – 935 °C | 1700 – 1720 °F | |||
| Boiling Point | 3520 °C | 6370 °F | |||
| Heat of Formation | 0.000 kJ/mol | 0.000 kJ/mol | Crystal | ||
| 355.6 kJ/mol | 355.6 kJ/mol | Gas | |||
| Optical Properties | Metric | English | Comments | ||
| Emissivity (0-1) | 0.284 @Wavelength >=645 nm, Temperature 931 – 1537 °C | 0.284 @Wavelength >=645 nm, Temperature 1710 – 2799 °F | Liquid | ||
| Component Elements Properties | Metric | English | Comments | ||
| Praseodymium, Pr | 100 % | 100 % | |||
| Descriptive Properties | |||||
| CAS Number | 7440-10-0 | ||||
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