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


Erbium
Chemical Properties & Compounds



Symbol Atomic Number Atomic Weight Melting Point Boiling Point Phase Density Classification
Er 68 167.259 1529 °C 2868 °C Solid 9.066 g/cm3 Metal


68 holmium ← erbium → thulium
-
↑
Er
↓
Fm
General
Name, Symbol, Number erbium, Er, 68
Chemical series lanthanides
Group, Period, Block n/a, 6, f
Appearance silvery white
Standard atomic weight 167.259(3)  g·mol−1
Electron configuration [Xe] 4f12 6s2
Electrons per shell 2, 8, 18, 30, 8, 2
Physical properties
Phase solid
Density (near r.t.) 9.066  g·cm−3
Liquid density at m.p. 8.86  g·cm−3
Melting point 1802 K
(1529 °C, 2784 °F)
Boiling point 3141 K
(2868 °C, 5194 °F)
Heat of fusion 19.90  kJ·mol−1
Heat of vaporization 280  kJ·mol−1
Heat capacity (25 °C) 28.12  J·mol−1·K−1
Vapor pressure
P(Pa) 1 10 100 1 k 10 k 100 k
at T(K) 1504 1663 (1885) (2163) (2552) (3132)
Atomic properties
Crystal structure hexagonal
Oxidation states 3
(basic oxide)
Electronegativity 1.24 (scale Pauling)
Ionization energies
(more)		 1st:  589.3  kJ·mol−1
2nd:  1150  kJ·mol−1
3rd:  2194  kJ·mol−1
Atomic radius 175  pm
Atomic radius (calc.) 226  pm
Miscellaneous
Magnetic ordering no data
Electrical resistivity (r.t.) (poly) 0.860 µΩ·m
Thermal conductivity (300 K) 14.5  W·m−1·K−1
Thermal expansion (r.t.) (poly)
12.2 µm/(m·K)
Speed of sound (thin rod) (20 °C) 2830 m/s
Young's modulus 69.9  GPa
Shear modulus 28.3  GPa
Bulk modulus 44.4  GPa
Poisson ratio 0.237
Vickers hardness 589  MPa
Brinell hardness 814  MPa
CAS registry number 7440-52-0
Selected isotopes
Main article: Isotopes of erbium
iso NA half-life DM DE (MeV) DP
160Er syn 28.58 h ε 0.330 160Ho
162Er 0.139% Er is stable with 94 neutrons
164Er 1.601% Er is stable with 96 neutrons
165Er syn 10.36 h ε 0.376 165Ho
166Er 33.503% Er is stable with 98 neutrons
167Er 22.869% Er is stable with 99 neutrons
168Er 26.978% Er is stable with 100 neutrons
169Er syn 9.4 d β- 0.351 169Tm
170Er 14.910% Er is stable with 102 neutrons
171Er syn 7.516 h β- 1.490 171Tm
172Er syn 49.3 h β- 0.891 172Tm
References
Erbium Compounds

Source: Wikipedia article Erbium


Privacy   Disclaimer   Contact   About    Site Map   Home

Last updated: October 2007

Copyright © 2006-2007 Patent-Invent.com