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Name: Lutetium
Symbol: Lu
Atomic Number: 71
Atomic Mass: 174.967 g
Number of Protons/Electrons: 71
Number of Neutrons: 104
Ionic Radius: Lu3+ / 0.848 Angstrom
Metal
Melting Point: 1663.0 °C
Boiling Point: 3315.0 °C
Density @ 293 K: 9.840 g/cm3
Oxide
Melting Point: 2490.0 °C
Density cubic C: 9.4209 g/cm3
Formula: Lu2O3
Molecular weight: 397.94 g
Metal %: 87.95
Toxicity LD 50.PO: (rat) > 1000 mg/kg
Dehydrated Carbonate
Formula *: Lu2(CO3)3
Molecular weight: 529.97 g
Oxide %: 75.1
Anhydrous Chloride
Formula *: LuCl3
Molecular weight: 281.33 g
Oxide %: 70.7
Toxicity LD 50.PO: (mouse) 7100 mg/kg
Anhydrous Fluoride
Formula *: LuF3
Molecular weight: 231.97 g
Oxide %: 85.75
Hydroxide
Formula *: Lu(OH)3
Molecular weight: 225.99 g
Oxide %: 88.05
Dehydrated Nitrate
Formula *: Lu(NO3)3
Molecular weight: 360.98 g
Oxide %: 55.1
Dehydrated Oxalate
Formula *: Lu2(C2O4)3
Molecular weight: 614.00 g
Oxide %: 64.8
Anhydrous sulfate
Formula *: Lu2(SO4)3
Molecular weight: 638.11 g
Oxide %: 62.35
* theoretic data
| Isotope |
Half Life |
| Lu-172 |
6.7 days |
| Lu-172m |
3.7 minutes |
| Lu-173 |
1.37 years |
| Lu-174 |
3.3 years |
| Lu-174m |
142.0 days |
| Lu-175 |
Stable |
| Lu-176 |
3.6E10 years |
| Lu-177 |
6.68 days |
| Lu-177m |
160.7 days |
Date of discovery: 1907
Discoverer: George Urbain
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Markets and applications
Applications:
Single crystal scintillator
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