Lutetium

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71

Lu

174.97
Physical Properties
Color silvery-white
Phase at Room Temp. solid
Density (g/cm3) 9.84
Hardness (Mohs) ---
Melting Point (K) 1929.2
Boiling Point (K) 3600
Heat of Fusion (kJ/mol) 19.2
Heat of Vaporization (kJ/mol) 414
Heat of Atomization (kJ/mol) ---
Thermal Conductivity (J/m sec K) 16.4
Electrical Conductivity (1/mohm cm) 16.7
Source Monazite (phosphate), bastnaesite
Atomic Properties
Electron Configuration [Xe]6s24f145d1
Number of Isotopes 59 (2 natural)
Electron Affinity (kJ/mol) 50
First Ionization Energy (kJ/mol) 523.6
Second Ionization Energy (kJ/mol) 1340
Third Ionization Energy (kJ/mol) 2022
Electronegativity 1.27
Polarizability (Å3) 21.9
Atomic Weight 174.97
Atomic Volume (cm3/mol) 17.8
Ionic Radius2- (pm) ---
Ionic Radius1- (pm) ---
Atomic Radius (pm) 174
Ionic Radius1+ (pm) ---
Ionic Radius2+ (pm) ---
Ionic Radius3+ (pm) 100.1
Common Oxidation Numbers +3
Other Oxid. Numbers ---
Abundance
In Earth's Crust (mg/kg) 8×10-1
In Earth's Ocean (mg/L) 1.5×10-7
In Human Body (%) ---
Regulatory / Health
CAS Number 7439-94-3
OSHA Permissible Exposure Limit (PEL) No limits
OSHA PEL Vacated 1989 No limits
NIOSH Recommended Exposure Limit (REL) No limits
Sources:
University of Wisconsin General Chemistry
Mineral Information Institute
Jefferson Accelerator Laboratory
EnvironmentalChemistry.com
 
Glossary

Citation

(2006). Lutetium. Retrieved from http://www.eoearth.org/view/article/51cbee5b7896bb431f697469

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