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Spanish: ItérbioSwedish:
Ytterbium
Atomic Structure of Ytterbium
Atomic Radius: 2.4Å
Atomic Volume: 24.79cm3/mol
Covalent Radius: 1.74Å
Cross Section (Thermal Neutron Capture) 
a/barns: 34.8
Crystal Structure: Cubic face centered
Electron Configuration:1s2
2s2p6
3s2p6d10
4s2p6d10f14
5s2p6
6s2
Electrons per Energy Level: 2,8,18,32,8,2
Shell Model
Ionic Radius: 0.858Å
Filling Orbital: 4f14
Number of Electrons (with no charge): 70
Number of Neutrons (most common/stable nuclide): 103
Number of Protons: 70
Oxidation States: 3,2
Valence Electrons: 4f14 6s2
Chemical Properties of Ytterbium
Electrochemical Equivalent: 2.152g/amp-hr
Electron Work Function:
Electronegativity: 1.1 (Pauling); 1.06 (Allrod Rochow)
Heat of Fusion: 7.66kJ/mol
Incompatibilities:
Ionization PotentialFirst: 6.254Second: 12.188Third: 25.03
Valence Electron Potential (-eV): 50.3
Physical Properties of Ytterbium
Atomic Mass Average: 173.04
Boiling Point: 1467K 1194°C 2181°F
Coefficient of lineal thermal expansion/K-1: 25E-6
ConductivityElectrical: 0.0351 106/cm 
Thermal: 0.349 W/cmK
Density: 6.9g/cc @ 300K
Description:Soft silvery rare earth metal that slowly oxidises in air and react with water.
Elastic Modulus:Bulk: 30.5/GPaRigidity: 9.9/GPaYoungs: 23.9/GPa
Enthalpy of Atomization: 180 kJ/mole @ 25°C
Enthalpy of Fusion: 7.66 kJ/mole
Enthalpy of Vaporization: 128.9 kJ/mole
Flammablity Class:
Freezing Point: see melting point
Hardness ScaleBrinell: 343 MN m-2Vickers: 206 MN m-2
Heat of Vaporization: 128.9kJ/mol
Melting Point: 1097K 824°C 1515°F
Molar Volume: 24.84 cm3/mole
Physical State (at 20°C & 1atm): Solid
Specific Heat: 0.15J/gK
Vapor Pressure = 395Pa@824°C
Regulatory / Health
CAS Number
7440-64-4
OSHA Permissible Exposure Limit (PEL)No limits set by OSHA
OSHA PEL Vacated 1989No limits set by OSHA
NIOSH Recommended Exposure Limit (REL)No limits set by NIOSH
Levels In Humans:Note: this data represents naturally occuring levels of elements in the typical human, it DOES NOT represent recommended daily allowances.Blood/mg dm-3: n/aBone/p.p.m: n/aLiver/p.p.m: n/aMuscle/p.p.m: n/aDaily Dietary Intake: n/aTotal Mass In Avg. 70kg human:
n/a
Discovery Year: 1878Name Origin:Named for Ytterby, Sweden.
Abundance of Ytterbium:Earth's Crust/p.p.m.: 3.3
Seawater/p.p.m.: Atlantic Suface: 0.0000005Atlantic Deep: 7.5E-07Pacific Surface: 3.7E-07Pacific Deep: 0.0000022
Atmosphere/p.p.m.: N/A
Sun (Relative to H=1E12): 8
Sources of Ytterbium: Found in minerals such as yttria, monazite, gadolinite, and xenotime. Annual world wide production is around 50 tons. Primary mining areas are USA, Canada, Greenland and Brazil.
Uses of Ytterbium:Used in metallurgical and chemical experiments and sometimes used in stress gauges.
Additional Notes:
[Last update: 2/22/2007]Notes below
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Ytterbium Menu
Ytterbium Page One
Overview of Ytterbium
Ytterbium's Name in Other Languages
Atomic Structure of Ytterbium
Chemical Properties of Ytterbium
Physical Properties of Ytterbium
Regulatory / Health
Who/When/Where/How
Ytterbium Page Two
Nuclides / Isotopes
Potential Parent Nuclides
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