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Template:Infobox ruthenium

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Revision as of 05:11, 6 October 2024 by imported>Jähmefyysikko (make the etymology more concise (the word is medieval, so "19th century" sounds incorrect))
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Ruthenium, 44Ru
Template:Infobox element/symbol-to-top-image-alt
Ruthenium
PronunciationTemplate:Infobox element/pronunciation/format
Appearancesilvery white metallic
Standard atomic weight Ar°(Ru)
Template:Infobox element/standard atomic weight format
Ruthenium 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
Fe
↑
Ru
↓
Os
technetium ← ruthenium → rhodium
Atomic number (Z)44
Groupgroup 8
Periodperiod 5
Block  d-block
Electron configuration[Kr] 4d7 5s1
Electrons per shell2, 8, 18, 15, 1
Physical properties
Phase at STPsolid
Melting point2607 K ​(2334 °C, ​4233 °F)
Boiling point4423 K ​(4150 °C, ​7502 °F)
Density (at 20° C)12.364 g/cm3[1]
when liquid (at m.p.)10.65 g/cm3
Heat of fusion38.59 kJ/mol
Heat of vaporization619 kJ/mol
Molar heat capacity24.06 J/(mol·K)
Specific heat capacity238.053 J/(kg·K)
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 2588 2811 3087 3424 3845 4388
Atomic properties
Oxidation statescommon: +3, +4
−2,[4] −1,[2] 0,[3] +1,[4] +2,[4] +5,[4] +6,[4] +7,[4] +8[4]
ElectronegativityPauling scale: 2.2
Ionization energies
  • 1st: 710.2 kJ/mol
  • 2nd: 1620 kJ/mol
  • 3rd: 2747 kJ/mol
Atomic radiusempirical: 134 pm
Covalent radius146±7 pm
Color lines in a spectral range
Spectral lines of ruthenium
Other properties
Natural occurrenceprimordial
Crystal structure ​hexagonal close-packed (hcp) (hP2)
Lattice constantsa = 270.58 pm
c = 428.16 pm (at 20 °C)[1]
Thermal expansion6.78×10−6/K (at 20 °C)[1][lower-alpha 1]
Thermal conductivity117

αa 5.77 αc 8.80

αavr 6.78 W/(m⋅K)
Electrical resistivity71 nΩ⋅m (at 0 °C)
Magnetic orderingparamagnetic[5]
Molar magnetic susceptibility+39×10−6 cm3/mol (298 K)[5]
Young's modulus447 GPa
Shear modulus173 GPa
Bulk modulus220 GPa
Speed of sound thin rod5970 m/s (at 20 °C)
Poisson ratio0.30
Mohs hardness6.5
Brinell hardness2160 MPa
CAS Number7440-18-8
History
Namingfrom Latin Ruthenia for Russia[6][7]
Discovery and first isolationKarl Ernst Claus (1844)
Isotopes of ruthenium
Main isotopes[8] Decay
Isotope abun­dance half-life (t1/2) mode pro­duct
96Ru 5.54% stable
97Ru synth 2.837 d ε 97Tc
98Ru 1.87% stable
99Ru 12.8% stable
100Ru 12.6% stable
101Ru 17.1% stable
102Ru 31.6% stable
103Ru synth 39.245 d β− 103Rh
104Ru 18.6% stable
106Ru synth 371.8 d β− 106Rh
File:Symbol category class.svg Category: Ruthenium
| references

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Notes

  1. ↑ The thermal expansion is anisotropic: the parameters (at 20 °C) for each crystal axis are αa = 5.77×10−6/K, αc = 8.80×10−6/K, and αaverage = αV = 6.78×10−6/K.[1]

References

  1. ↑ 1.0 1.1 1.2 1.3 Arblaster, John W. (2018). Selected Values of the Crystallographic Properties of Elements. Materials Park, Ohio: ASM International. ISBN 978-1-62708-155-9.
  2. ↑ Ru(–1) occurs in [Ru2(CO)8]2–; see Xuenian Chen; Hima Kumar Lingam; Edward A. Meyers; Sheldon G. Shore (2012). "Structures of DMF solvated potassium and sodium salts of [Fe(CO)4]2– and [M2(CO)8]2– (M = Fe, Ru)". Journal of Organometallic Chemistry. 721–722: 137–143. doi:10.1016/j.jorganchem.2012.07.040.
  3. ↑ Ru(0) is present in the carbonyl-phosphine complex Ru(CO)2(PPh3)3, see Stephane Sentets; Maria del Carmen Rodriguez Martinez; Laure Vendier; Bruno Donnadieu; Vincent Huc; Noël Lugan; Guy Lavigne (2005). "Instant "Base-Promoted" Generation of Roper's-type Ru(0) Complexes Ru(CO)2(PR3)3 from a Simple Carbonylchlororuthenium(II) Precursor". J. Am. Chem. Soc. 127 (42): 14554–14555. doi:10.1021/ja055066e. PMID 16231891.
  4. ↑ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. p. 28. doi:10.1016/C2009-0-30414-6. ISBN 978-0-08-037941-8.
  5. ↑ 5.0 5.1 Haynes, p. 4.130
  6. ↑ Lewis, David E. (2019-09-02). "The Minor Impurity in Spent Ores of the "Siberian Metal": Ruthenium Turns 175". Chemistry – A European Journal. 25 (49): 11394–11401. doi:10.1002/chem.201901922. ISSN 0947-6539.
  7. ↑ Pitchkov, By V. N. (1996-10-01). "The Discovery of Ruthenium: "I Named The New Body, in Honour of my Motherland"". Platinum Metals Review. 40 (4): 181–188. doi:10.1595/003214096X404181188. ISSN 0032-1400.
  8. ↑ Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). "The NUBASE2020 evaluation of nuclear properties" (PDF). Chinese Physics C. 45 (3) 030001. doi:10.1088/1674-1137/abddae.