Ti

Titanium

Identification

CAS Number: 7440-32-6

Discovery Year: 1791

Discoverer: William Gregor

Discovery Location: England

Properties

Atomic Mass: 47.867 →Density: 4.506 g/cm³ →

Crust Abundance: 5650 mg/kg

Crystal Structure: HEX

Atomic Dimensions

Atomic Radius: 140 pm →

Atomic Radius (Rahm): 257 pm

Covalent Radius: 160 pm →

Van der Waals Radius: 211 pm

Metallic Radius: 132 pm

Atomic Volume: 10.6 cm³/mol

Lattice Constant: 2.95 Å

Thermodynamics

Melting Point: 1933 K →Boiling Point: 3560 K →Specific Heat: 0.523 J/(g·K) →Thermal Conductivity: 21.9 W/(m·K) →Heat of Fusion: 18.8 kJ/mol →Heat of Vaporization: 422.6 kJ/mol →

Heat of Formation: 473 kJ/mol

Electronic Structure

Electron Config: [Ar] 3d2 4s2

Block: d

Period: 4 →Group: 4 →Electronegativity: 1.54 →Electron Affinity: 0.079 eV →

Oxidation States: +2, +3, +4

Abundance & Geochemistry

Crust Abundance: 5650 mg/kg

Sea Abundance: 0.001 mg/L

Geochemical Class: first series transition metal

Goldschmidt Class: litophile

About

White metallic transition element. Occurs in numerous minerals. Used in strong, light corrosion-resistant alloys. Forms a passive oxide coating when exposed to air. First discovered by Gregor in 1789.

Isotopes

Ti-48 48 73.72%

Ti-46 46 8.25%

Ti-47 47 7.44%

Ti-49 49 5.41%

Ti-50 50 5.18%