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Template:Infobox uranium

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Uranium, 92U
Two hands in brown gloves holding a blotched gray disk with a number 2068 hand-written on it
Uranium
Pronunciation/jʊˈreɪniəm/ ​(yuu-RAY-nee-əm)
Appearancesilvery gray metallic; corrodes to a spalling black oxide coat in air
Standard atomic weight Ar°(U)
Uranium in the periodic table
Hydrogen Helium
Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon
Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon
Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon
Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon
Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson
Nd
↑
U
↓
—
protactinium ← uranium → neptunium
Atomic number (Z)92
Groupf-block groups (no number)
Periodperiod 7
Block  f-block
Electron configuration[Rn] 5f3 6d1 7s2
Electrons per shell2, 8, 18, 32, 21, 9, 2
Physical properties
Phase at STPsolid
Melting point1405.3 K ​(1132.2 °C, ​2070 °F)
Boiling point4404 K ​(4131 °C, ​7468 °F)
Density (at 20° C)19.050 g/cm3 [3]
when liquid (at m.p.)17.3 g/cm3
Heat of fusion9.14 kJ/mol
Heat of vaporization417.1 kJ/mol
Molar heat capacity27.665 J/(mol·K)
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 2325 2564 2859 3234 3727 4402
Atomic properties
Oxidation statescommon: +6
−1,[4] +1,? +2,? +3,[5] +4,[6] +5[6]
ElectronegativityPauling scale: 1.38
Ionization energies
  • 1st: 597.6 kJ/mol
  • 2nd: 1420 kJ/mol
Atomic radiusempirical: 156 pm
Covalent radius196±7 pm
Van der Waals radius186 pm
Color lines in a spectral range
Spectral lines of uranium
Other properties
Natural occurrenceprimordial
Crystal structure ​orthorhombic (oS4)
Lattice constantsa = 285.35 pm
b = 586.97 pm
c = 495.52 pm (at 20 °C)[3]
Thermal expansion15.46×10−6/K (at 20 °C)[lower-alpha 1]
Thermal conductivity27.5 W/(m⋅K)
Electrical resistivity0.280 µΩ⋅m (at 0 °C)
Magnetic orderingparamagnetic
Young's modulus208 GPa
Shear modulus111 GPa
Bulk modulus100 GPa
Speed of sound thin rod3155 m/s (at 20 °C)
Poisson ratio0.23
Vickers hardness1960–2500 MPa
Brinell hardness2350–3850 MPa
CAS Number7440-61-1
History
Namingafter planet Uranus, itself named after Greek god of the sky Uranus
DiscoveryMartin Heinrich Klaproth (1789)
First isolationEugène-Melchior Péligot (1841)
Isotopes of uranium
Main isotopes[7] Decay
abun­dance half-life (t1/2) mode pro­duct
232U synth 68.9 y α 228Th
SF –
233U trace 1.592×105 y[8] α 229Th
SF –
234U 0.005% 2.455×105 y α 230Th
SF –
235U 0.720% 7.038×108 y α 231Th
SF –
236U trace 2.342×107 y α 232Th
SF –
238U 99.3% 4.468×109 y α 234Th
SF –
β−β− 238Pu
File:Symbol category class.svg Category: Uranium
| references
child table, as reused in {IB-U}
Main isotopes of uranium
Main isotopes[7] Decay
abun­dance half-life (t1/2) mode pro­duct
232U synth 68.9 y α 228Th
SF –
233U trace 1.592×105 y[9] α 229Th
SF –
234U 0.005% 2.455×105 y α 230Th
SF –
235U 0.720% 7.038×108 y α 231Th
SF –
236U trace 2.342×107 y α 232Th
SF –
238U 99.3% 4.468×109 y α 234Th
SF –
β−β− 238Pu
Data sets read by {{Infobox element}}
Name and identifiers
Symbol etymology (11 non-trivial)
Top image (caption, alt) caption:

alt:
Pronunciation
Allotropes (overview)
Group (overview)
Period (overview)
Block (overview)
Natural occurrence
Phase at STP
Oxidation states
Spectral lines image
Electron configuration (cmt, ref)
Isotopes
Standard atomic weight
  most stable isotope
File:Notification-icon-Wikidata-logo.svg Wikidata
Wikidata *
* Not used in {{Infobox element}} (2023-01-01)
See also {{Index of data sets}} · Cat:data sets (0) · (this table:
)

Notes

  1. ↑ The thermal expansion is anisotropic: the coefficients for each crystal axis (at 20 °C) are αa = 25.27×10−6/K, αb = 0.76×10−6/K, αc = 20.35×10−6/K, and αaverage = αvolume/3 = 15.46×10−6/K.

References

These references will appear in the article, but this list appears only on this page.
  1. ↑ Lua error in Module:Citation/CS1/Configuration at line 2088: attempt to index field '?' (a nil value).
  2. ↑ Lua error in Module:Citation/CS1/Configuration at line 2088: attempt to index field '?' (a nil value).
  3. ↑ Jump up to: 3.0 3.1 Lua error in Module:Citation/CS1/Configuration at line 2088: attempt to index field '?' (a nil value).
  4. ↑ Th(-I) and U(-I) have been detected in the gas phase as octacarbonyl anions; see Lua error in Module:Citation/CS1/Configuration at line 2088: attempt to index field '?' (a nil value).
  5. ↑ Lua error in Module:Citation/CS1/Configuration at line 2088: attempt to index field '?' (a nil value).
  6. ↑ Jump up to: 6.0 6.1 Lua error in Module:Citation/CS1/Configuration at line 2088: attempt to index field '?' (a nil value).
  7. ↑ Jump up to: 7.0 7.1 Lua error in Module:Citation/CS1/Configuration at line 2088: attempt to index field '?' (a nil value).
  8. ↑ Lua error in Module:Citation/CS1/Configuration at line 2088: attempt to index field '?' (a nil value).
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