మూస:Infobox niobium

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నియోబియం, 00Nb
A lump of gray shining crystals with hexagonal facetting
నియోబియం
Pronunciation/naɪˈoʊbiəm/ ​(ny-OH-bee-əm)
Appearancegray metallic, bluish when oxidized
Standard atomic weight Ar°(Nb)
నియోబియం 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 Ununtrium Flerovium Ununpentium Livermorium Ununseptium Ununoctium
V
↑
Nb
↓
Ta
జిర్కోనియం ← నియోబియం → మాలిబ్డెనం
Groupమూస:Infobox element/symbol-to-group/format
Periodperiod 5
Block  d-block
Electron configuration[Kr] 4d4 5s1
Electrons per shell2, 8, 18, 12, 1
Physical properties
Phase at STPsolid
Melting point2750 K ​(2477 °C, ​4491 °F)
Boiling point5017 K ​(4744 °C, ​8571 °F)
Density (near r.t.)8.57 g/cm3
Heat of fusion30 kJ/mol
Heat of vaporization689.9 kJ/mol
Molar heat capacity24.60 J/(mol·K)
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 2942 3207 3524 3910 4393 5013
Atomic properties
Oxidation states−3, −1, 0, +1, +2, +3, +4, +5 (a mildly acidic oxide)
ElectronegativityPauling scale: 1.6
Atomic radiusempirical: 146 pm
Covalent radius164±6 pm
Color lines in a spectral range
Spectral lines of నియోబియం
Other properties
Natural occurrenceprimordial
Crystal structure ​body-centered cubic (bcc)
Cubic body-centered crystal structure for నియోబియం
Speed of sound thin rod3480 m/s (at 20 °C)
Thermal expansion7.3 µm/(m⋅K)
Thermal conductivity53.7 W/(m⋅K)
Electrical resistivity152 n Ω⋅m (at 0 °C)
Magnetic orderingparamagnetic
Young's modulus105 GPa
Shear modulus38 GPa
Bulk modulus170 GPa
Poisson ratio0.40
Mohs hardness6.0
Vickers hardness1320 MPa
Brinell hardness736 MPa
CAS Number7440-03-1
History
DiscoveryCharles Hatchett (1801)
First isolationChristian Wilhelm Blomstrand (1864)
రసాయన మూలకం గా గుర్తించినవారుHeinrich Rose (1844)
Isotopes of నియోబియం
Template:infobox నియోబియం isotopes does not exist
 Category: నియోబియం
| references

References

These references will appear in the article, but this list appears only on this page.
  1. ↑ "Standard Atomic Weights: Niobium". CIAAW. 2017.
  2. ↑ Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; et al. (2022-05-04). "Standard atomic weights of the elements 2021 (IUPAC Technical Report)". Pure and Applied Chemistry (in ఇంగ్లీష్). doi:10.1515/pac-2019-0603. ISSN 1365-3075.


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