Chemistry Quick Facts
Google
 
 
Element Properties
   By Name
  By Atomic Number
  By Density
  Melting & Boiling Point
  Electron Configuration
  Radioactive Elements
  Noble & Precious Metals
Periodic Table
Groups
   Periodic Table
  Alkali Metals
  Alkaline Earth Metals
  Halogens
  Noble (Inert) Gases
  Rare Earth Elements
  Transition Metals
  Metalloids (Semimetals)
  Nonmetals
  Poor Metals
Materials
   Toxic Substances
  Semiconductor Materials
  Vitamins
  Amino Acids
Inventions
& Patents
Reference


Zirconium
Chemical Properties & Compounds



Symbol Atomic Number Atomic Weight Melting Point Boiling Point Phase Density Classification
Zr 40 91.224 1855 °C 4409 °C Solid 6.52 g/cm3 Metal


40 yttrium ← zirconium → niobium
Ti
↑
Zr
↓
Hf
General
Name, Symbol, Number zirconium, Zr, 40
Chemical series transition metals
Group, Period, Block 4, 5, d
Appearance silvery white
Standard atomic weight 91.224(2)  g·mol−1
Electron configuration [Kr] 4d2 5s2
Electrons per shell 2, 8, 18, 10, 2
Physical properties
Phase solid
Density (near r.t.) 6.52  g·cm−3
Liquid density at m.p. 5.8  g·cm−3
Melting point 2128 K
(1855 °C, 3371 °F)
Boiling point 4682 K
(4409 °C, 7968 °F)
Heat of fusion 14  kJ·mol−1
Heat of vaporization 573  kJ·mol−1
Heat capacity (25 °C) 25.36  J·mol−1·K−1
Vapor pressure
P(Pa) 1 10 100 1 k 10 k 100 k
at T(K) 2639 2891 3197 3575 4053 4678
Atomic properties
Crystal structure hexagonal
Oxidation states 4
(amphoteric oxide)
Electronegativity 1.33 (scale Pauling)
Ionization energies
(more)		 1st:  640.1  kJ·mol−1
2nd:  1270  kJ·mol−1
3rd:  2218  kJ·mol−1
Atomic radius 155  pm
Atomic radius (calc.) 206  pm
Covalent radius 148  pm
Miscellaneous
Magnetic ordering no data
Electrical resistivity (20 °C) 421 n Ω·m
Thermal conductivity (300 K) 22.6  W·m−1·K−1
Thermal expansion (25 °C) 5.7  µm·m−1·K−1
Speed of sound (thin rod) (20 °C) 3800 m/s
Young's modulus 68  GPa
Shear modulus 33  GPa
Poisson ratio 0.34
Mohs hardness 5.0
Vickers hardness 903  MPa
Brinell hardness 650  MPa
CAS registry number 7440-67-7
Selected isotopes
Main article: Isotopes of zirconium
iso NA half-life DM DE (MeV) DP
88Zr syn 83.4 d ε - 88Y
γ 0.392D -
89Zr syn 78.4 h ε - 89Y
β+ 0.902 89Y
γ 0.909D -
90Zr 51.45% Zr is stable with 50 neutrons
91Zr 11.22% Zr is stable with 51 neutrons
92Zr 17.15% Zr is stable with 52 neutrons
93Zr syn 1.53×106y β− 0.060 93Nb
94Zr 17.38% Zr is stable with 54 neutrons
96Zr 2.8% 2.0×1019y [1] β−β− 3.348 96Mo
References
Zirconium Compounds

Source: Wikipedia article Zirconium


Privacy   Disclaimer   Contact   About    Site Map   Home

Last updated: October 2007

Copyright © 2006-2007 Patent-Invent.com