Periodic System for Chemists

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Table
70
173.04

Yb

Ytterbium

Identification

CAS Number: 7440-64-4
Discovery Year: 1878
Discoverer: Jean de Marignac
Discovery Location: Switzerland

Properties

Atomic Mass: 173.045 →Density: 6.9 g/cm³ →
Crust Abundance: 3.2 mg/kg
Crystal Structure: FCC

Atomic Dimensions

Atomic Radius: 175 pm →
Atomic Radius (Rahm): 277 pm
Covalent Radius: 187 pm →
Van der Waals Radius: 225.99999999999997 pm
Atomic Volume: 24.8 cm³/mol
Lattice Constant: 5.49 Å

Thermodynamics

Melting Point: 1097 K →Boiling Point: 1466 K →Specific Heat: 0.145 J/(g·K) →Heat of Fusion: 3.35 kJ/mol →Heat of Vaporization: 159 kJ/mol →
Heat of Formation: 155.6 kJ/mol

Electronic Structure

Electron Config: [Xe] 4f14 6s2
Block: f
Period: 6 →Electron Affinity: -0.02 eV →
Oxidation States: +2, +3

Abundance & Geochemistry

Crust Abundance: 3.2 mg/kg
Sea Abundance: 8.2e-7 mg/L
Geochemical Class: rare earth & related
Goldschmidt Class: litophile

About

Silvery metallic element of the lanthanoids. Seven natural isotopes and ten artificial isotopes are known. Used in certain steels. Discovered by J.D.G. Marignac in 1878.

Isotopes

Yb-174 174 31.90%
Yb-172 172 21.75%
Yb-173 173 16.10%
Yb-171 171 14.22%
Yb-176 176 12.89%
Yb-170 170 3.02%
Yb-168 168 0.1260%

Related Elements

Category

Lanthanides

Same Period

67 Ho Holmium68 Er Erbium69 Tm Thulium71 Lu Lutetium72 Hf Hafnium73 Ta Tantalum

Periodic Trends

Electronegativity →Atomic Radius →Density →Melting Point →

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