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Name: Yttrium
Symbol: Y
Atomic Number: 39
Atomic Mass: 88.90585 g
Number of Protons/Electrons: 39
Number of Neutrons: 50
Ionic Radius: Y3+ / 0.893 Angstrom
Metal
Melting Point: 1526.0 °C
Boiling Point: 3337.0 °C
Density @ 293 K: 4.469 g/cm3
Oxide
Melting Point: 2415.0 °C
Density cubic C: 2.989 g/cm3
Formula: Y2O3
Molecular weight: 225.81 g
Oxide %: 78.75
Dehydrated Carbonate
Formula: Y2(CO3)3
Molecular weight: 357.84 g
Oxide %: 63.1
Anhydrous Chloride
Formula: Y2Cl3
Molecular weight: 195.26 g
Oxide %: 57.8
Anhydrous Fluoride
Formula: YF3
Molecular weight: 1445.90 g
Oxide %: 77.4
Hydroxide
Formula: Y(OH)3
Molecular weight: 139.93 g
Oxide %: 80.7
Dehydrated Nitrate
Formula: Y2(NO3)3
Molecular weight: 274.92 g
Oxide %: 41.05
Dehydrated Oxalate
Formula: Y2(CO3)3
Molecular weight: 441.87 g
Oxide %: 51.1
Anhydrous sulfate
Formula: Y2(SO4)3
Molecular weight: 465.98 g
Oxide %: 48.45
* theoretic data
| Isotope |
Demi-vie |
Y-86
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14.74 hours |
Y-87
|
3.35 days |
Y-88
|
106.6 days |
Y-89
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Stable |
Y-90
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2.67 days |
| Y-90m |
3.19 hours |
| Y-91 |
58.51 days |
| Y-91m |
49.71 minutes |
| Y-92 |
3.54 hours |
| Y-93 |
10.2 hours |
Date of discovery: 1794
Discoverer: Johann Gadolin
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Markets and applications
Electronics:
Luminescence (three band lamps),
Cathode ray tubes (CRT),
Ceramics (capacitors),
SUPERAMIC™,
Phosphors,
Ferrite for micro-waves
Others:
Glass industry,
Oxygen sensor,
Radars,
Laser,
Refractors
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