Chemicool

Lu

71

174.96
Lutetium
General | States | Energies | Oxidation & Electrons |Appearance & Characteristics
Reactions | Other Forms |Radius | Conductivity | Abundance
Encyclopedia Britannica articles

General
Name Lutetium Symbol Lu
atomic number 71 Atomic weight 174.96
Density @ 293 K 9.85 g/cm3 Atomic volume 17.78 cm3/mol
Group Rare Earth, Lanthanides discovered 1907

States
state (s, l, g) s
melting point 1929.2 K boiling point 3600 K
Heat of fusion 18.60 kJ/mol Heat of vaporization 355.90 kJ/mol
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Energies
1st ionization energy 523.6 kJ/mole electronegativity 1.27
2nd ionization energy 1340 kJ/mole electron affinity 50 kJ/mole
3rd ionization energy 2022 kJ/mole Specific heat 0.15 J/gK
heat atomization kJ/mole atoms

Oxidation & Electrons
Shells 2,8,18,32,9,2 electron configuration [Xe] 4f14 5d1 6s2
minimum oxidation number 0 maximum oxidation number 3
min. common oxidation no. 0 max. common oxidation no. 3
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Appearance & Characteristics
structure hcp: hexagonal close pkd color silvery-white
uses alloys toxicity
hardness mohs characteristics

Reactions
reaction with air vigorous, = Lu2O3 reaction with 6M HCl mild, = H2, LuCl3
reaction with 6M HCl mild, = H2, LuCl3 reaction with 15M HNO3 mild, = Lu(NO3)3
reaction with 6M NaOH
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Other Forms
number of isotopes 2 hydride(s) LuH2 LuH3
oxide(s) Lu2O3 chloride(s) LuCl3

Radius
ionic radius (2- ion) pm ionic radius (1- ion) pm
atomic radius 174 pm ionic radius (1+ ion) pm
ionic radius (2+ ion) pm ionic radius (3+ ion) 100.1 pm
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Conductivity
thermal conductivity 16.4 J/m-sec-deg electrical conductivity 16.7 1/mohm-cm
polarizability 21.9 A^3

Abundance
source Monazite(phosphate),bastnaesite rel. abund. solar system -1.435 log
abundance earth's crust -0.3 log cost, pure 6900 $/100g
cost, bulk $/100g
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