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Name: Dysprosium
Symbol: Dy
Atomic Number: 66
Atomic Mass: 162.5 g
Number of Protons/Electrons: 66
Number of Neutrons: 97
Ionic Radius: DY3+ / 0.908 Angstrom
Metal
Melting Point: 1409.0 °C
Boiling Point: 2335.0 °C
Density @ 293 K: 8.550 g/cm3
Oxide
Melting Point: 2340.0 °C
Density cubic C: 8.161 g/cm3
Formula: DY2O3
Molecular weight: 373.00 g
Metal %: 87.5
Toxicity LD 50.PO: (rat) > 1000 mg/kg
Dehydrated Carbonate
Formula *: DY2(CO3)3
Molecular weight: 505.03 g
Oxide %: 73.85
Anhydrous Chloride
Formula *: DyCl3
Molecular weight: 268.86 g
Oxide %: 69.35
Toxicity LD 50.PO: (mouse) 7650 mg/kg
Anhydrous Fluoride
Formula *: DyF3
Molecular weight: 219.05 g
Oxide %: 84.95
Hydroxide
Formula *: Dy(OH)3
Molecular weight: 213.52 g
Oxide %: 87.35
Dehydrated Nitrate
Formula *: Dy(NO3)3
Molecular weight: 348.51 g
Oxide %: 53.5
Toxicity LD 50.PO: (rat) 3100 mg/kg
Dehydrated Oxalate
Formula *: DY2(C2O4)3
Molecular weight: 589.06 g
Oxide %: 63.3
Anhydrous sulfate
Formula *: DY2(SO4)3
Molecular weight: 613.17 g
Oxide %: 60.85
* theoretic data
| Isotope |
Half Life |
| Dy-154 |
3000000.0 years |
| Dy-154 |
Stable |
| Dy-157 |
8.1 hours |
| Dy-158 |
Stable |
| Dy-159 |
144.4 days |
| Dy-160 |
Stable |
| Dy-161 |
Stable |
| Dy-162 |
Stable |
| Dy-163 |
Stable |
| Dy-164 |
Stable |
| Dy-165 |
2.3 hours |
| Dy-166 |
3.4 days |
Date of discovery: 1886
Discoverer: Paul Emile Lecoq de Boisbaudran
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Markets and applications
Electronics:
Luminescence,
Phosphors,
Applications for nuclear industry,
Ceramics
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