Erbium element properties

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Name: Erbium Symbol: Er
Group: Rare Earth, Lanthanides Atomic weight: 167.26
Density @ 293 K: 9.05 g/cm3 Atomic volume: 18.4 cm3/mol
Group: Rare Earth, Lanthanides discovered: 1843


state (s, l, g): s
melting point: 1795.2 K boiling point: 3173 K
Heat of fusion: 19.90 kJ/mol Heat of vaporization: 261.0 kJ/mol


1st ionization energy: 588.7 kJ/mole
electronegativity: 1.24 2nd ionization energy: 1151 kJ/mole
electron affinity: 50 kJ/mole 3rd ionization energy: 2194 kJ/mole
Specific heat: 0.17 J/gK heat atomization: 317 kJ/mole atoms

Oxidation & Electrons:

Shells: 2,8,18,30,8,2 electron configuration: [Xe] 4f12 6s2
minimum oxidation number: 0 maximum oxidation number: 3
min. common oxidation no.: 0 max. common oxidation no.: 3

Appearance & Characteristics:

structure: hcp: hexagonal close pkd color: silvery-white
uses: alloys, photogr. filter toxicity:
hardness: mohs characteristics:


reaction with air: vigorous, =>Er2O3
reaction with 6M HCl: mild, =>H2, ErCl3 reaction with 6M HCl: mild, =>H2, ErCl3
reaction with 15M HNO3: mild, =>Er(NO3)3 reaction with 6M NaOH:

Other Forms:

number of isotopes: 6 hydride(s): ErH2 ErH3
oxide(s): Er2O3 chloride(s): ErCl3


ionic radius (2- ion): pm ionic radius (1- ion): pm
atomic radius: 176 pm ionic radius (1+ ion): pm
ionic radius (2+ ion): pm ionic radius (3+ ion): 103 pm


thermal conductivity: 14.5 J/m-sec-deg
electrical conductivity: 14.1 1/mohm-cm polarizability: 22.7 A^3


source: Monazite(phosphate),bastnaesite
rel. abund. solar system: -0.601 log abundance earth's crust: 0.4 log
cost, pure: 270 $/100g cost, bulk: $/100g

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