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%