Uranium Elemental Symbol
Uranium



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D'uranium Uran Uranio De urânio Uranio Uran

Uranium Bohr ModelUranium is a Block F, Group 3, Period 7 element. The number of electrons in each of Uranium's shells is 2, 8, 18, 32, 21, 9, 2 and its electron configuration is [Rn] 5f3 6d1 7s2. The uranium atom has a radius of 138.5.pm High Purity (99.999%) Uranium Oxide (UO) Powderand it's Van der Waals radius is 186.pm. In its elemental form, CAS 7440-61-1, uranium has a silvery gray metallic appearance. Uranium was discovered by Martin Heinrich Klaproth in 1789. It was first isolated by Eugène-Melchior Péligot in 1841. The name Uranium originates from the planet Uranus.

Uranium in its depleted and unenriched forms has numerous commercial applications due to its great density and its bright yellow-green color in glass and ceramics. Because of its great density it has found military applications in armor piercing armaments and in protective shielding. Uranyl Nitrate and Uranyl Acetate are used in medical and analytical laboratories. Uranium is harmful both through its radioactivity and chemical toxicity. Uranium information, including technical data, safety data and its high purity properties, research, applications and other useful facts are discussed below. Scientific facts such as the atomic structure, ionization energy, abundance on earth, conductivity and thermal properties are included.


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  • Isotopes
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Uranium Properties


GENERAL PROPERTIES   PHYSICAL PROPERTIES  
Symbol: U Melting Point: 1135 oC, 2075 oF, 1408.15 K
Atomic Number: 92 Boiling Point: 4131 oC, 7467.8 oF, 4404.15 K
Atomic Weight: 238 Density: 19050 kg m-3
Element Category: Actinide Liquid Density @ Melting Point: 17.3 g·cm−3
Group, Period, Block: n/a, 7, f Specific Heat: N/A
    Heat of Vaporization 417.1 kJ·mol−1
CHEMICAL STRUCTURE Heat of Fusion 9.14 kJ·mol−1
Electrons: 92 Thermal Conductivity: 27.5 W·m−1·K−1
Protons: 92 Thermal Expansion: (25 °C) 13.9 µm·m−1·K−1
Neutrons: 146 Electrical Resistivity: (0 °C) 0.280 µΩ·m
Electron Configuration: [Rn] 5f36d17s2 Electronegativity: 1.38 (Pauling scale)
Atomic Radius: 156 pm Tensile Strength: N/A
Covalent Radius: 196±7 pm Molar Heat Capacity: 27.665 J·mol−1·K−1
Van der Waals radius: 186 pm Young's Modulus: 208 GPa
Oxidation States: 6, 5, 4 Shear Modulus: 111 GPa
Phase: Solid  Bulk Modulus: 100 GPa
Crystal Structure: orthorhombic Poisson Ratio: 0.23
Magnetic Ordering: paramagnetic Mohs Hardness: N/A
1st Ionization Energy: 597.6 kJ·mol−1 Vickers Hardness: N/A
2nd Ionization Energy: 1420 kJ·mol−1 Brinell Hardness: N/A
3rd Ionization Energy: N/A Speed of Sound: (20 °C) 3155 m·s−1
       
IDENTIFIERS   MISCELLANEOUS  
CAS Number: 7440-61-1 Abundance in typical human body, by weight: N/A
ChemSpider ID: 22425 Abundance in typical human body, by atom: N/A
PubChem CID: 23989 Abundance in universe, by weight: N/A
MDL Number: N/A Abundance in universe, by atom: N/A
EC Number: N/A Discovered By: Martin Heinrich Klaproth
Beilstein Number: N/A Discovery Date: 1789
SMILES Identifier: [U]  
InChI Identifier: InChI=1S/U Other Names: D'uranium, Uran, Uranio
InChI Key: JFALSRSLKYAFGM-UHFFFAOYSA-N  
       
       
       
       
       


Recent Research & Development for Uranium

  • Texturing formulations for uranium skin decontamination. Belhomme-Henry C, Phan G, Huang N, Bouvier C, Rebière F, Agarande M, Fattal E. Pharm Dev Technol. 2014 Sep.
  • Evaporation induced self assembled microstructures of silica nanoparticles and Streptococcus lactis cells as sorbent for uranium (VI). J Colloid Interface Sci. 2014 | first author:Mishra A
  • Fast removal of uranium from aqueous solutions using tetraethylenepentamine modified magnetic chitosan resin - KZ Elwakeel, AA Atia, E Guibal - Bioresource Technology, 2014 - Elsevier
  • Genes required for alleviation of uranium toxicity in sulfate reducing bacterium Desulfovibio alaskensis G20 - X Li, H Zhang, Y Ma, P Liu, LR Krumholz - Ecotoxicology, 2014 - Springer
  • Electronic structure and thermodynamic stability of uranium-doped yttrium iron garnet. J Phys Condens Matter. | first author:Rák Z
  • Assessment of the vertical distribution of natural radionuclides in a mineralized uranium area in south-west Spain. Chemosphere. 2014 create date:2013/11/05 | first author:Blanco Rodríguez P
  • Magnetic properties and chiral states of a trimetallic uranium complex. J Phys Condens Matter. 2013 | first author:Carretta S
  • Decay chains and photofission investigation based on nuclear spectroscopy of highly enriched uranium sample. Appl Radiat Isot. 2013 | first author:Sibczynski P
  • Uranium deposition in bones of Wistar rats associated with skeleton development. Appl Radiat Isot. 2013 | first author:Rodrigues G
  • Biosorption of uranium by melanin: Kinetic, equilibrium and thermodynamic studies. Bioresour Technol. 2013 | first author:Saini AS
  • Silica dust, radon and death from non-malignant respiratory diseases in German uranium miners. Occup Environ Med. 2013 | first author:Kreuzer M
  • Controlled Thermolysis of Uranium (Alkoxy)siloxy Complexes: A Route to Polymetallic Complexes of Low-Valent Uranium. Angew Chem Int Ed Engl. | first author:Camp C
  • Synthesis of Terminal Uranium(IV) Disulfido and Diselenido Compounds by Activation of Elemental Sulfur and Selenium. Chemistry. 2013 create date:2013/10/24 | first author:Matson EM
  • Uranium association with iron-bearing phases in mill tailings from gunnar, Canada. Environ Sci Technol. 2013 | first author:Othmane G
  • Bioprecipitation of uranium from alkaline waste solutions using recombinant Deinococcus radiodurans. J Hazard Mater. 2013 | first author:Kulkarni S
  • Mechanism of uranium(VI) uptake by Saccharomyces cerevisiae under environmentally relevant conditions: Batch, HRTEM, and FTIR studies. J Hazard Mater. 2013 create date:2013/09/18 | first author:Lu X
  • Retention and chemical speciation of uranium in an oxidized wetland sediment from the Savannah River Site. J Environ Radioact. 2013 create date:2013/11/19 | first author:Li D
  • High-Temperature, High-Pressure Hydrothermal Synthesis, Crystal Structures, and Spectroscopic Studies of a Uranium(IV) Phosphate (Na(10)U(2)P(6)O(24)) and the Isotypic Cerium(IV) Phosphate (Na(10)Ce(2)P(6)O(24)). Inorg Chem. 2013 | first author:Lai YH
  • Accumulation of uranium by aquatic plants in field conditions: Prospects for phytoremediation. Sci Total Environ. | first author:Favas PJ
  • Curium analysis in plutonium uranium mixed oxide by x-ray fluorescence and absorption fine structure spectroscopy. Talanta 2013 | first author:Degueldre C

Uranium Isotopes


Uranium has two primordial isotopes with long half-lifes: 235U and 238U. Both of these are found in the earth's crust. It has no stable isotopes.