Lutetium

71
Lu
Gruppe
n/a
Periode
6
Blok
d
Protons
Electrons
Neutrons
71
71
104
General Properties
Atomnummer
71
Atommasse
174,9668
Mass Number
175
Kategori
Lantanider
Farve
Silver
Radioactive
Nej
Lutetia is the ancient name for Paris
Krystalstruktur
Simpel Hexagonal
History
French chemist Georges Urbain successfully separated lutetium from ytterbia in 1907 in Paris.

Austrian scientist Carl Auer von Welsbach and American chemist Charles James also succeeded in isolating lutetium independently in the same year.

Pure lutetium metal was first produced in 1953.
Elektroner i hver skal
2, 8, 18, 32, 9, 2
Elektronkonfiguration
[Xe] 4f14 5d1 6s2
Lu
Lutetium was the last natural rare earth element to be discovered
Physical Properties
Tilstandsform
Fast stof
Massefylde
9,84 g/cm3
Smeltepunkt
1925,15 K | 1652 °C | 3005,6 °F
Kogepunkt
3675,15 K | 3402 °C | 6155,6 °F
Smeltevarme
22 kJ/mol
Fordampningsvarme
415 kJ/mol
Varmefylde
0,154 J/g·K
Abundance in Earth's crust
0,000056%
Abundance in Universe
1×10-8%
Ultrapure
Billede akkrediteringer: Images-of-elements
Ultrapure piece of lutetium
CAS Number
7439-94-3
PubChem CID Number
23929
Atomic Properties
Atomradius
174 pm
Kovalent radius
187 pm
Elektronegativitet
1,27 (Paulings skala)
Ionization Potential
5,4259 eV
Atomic Volume
17,78 cm3/mol
Varmeledningsevne
0,164 W/cm·K
Oxidationstrin
3
Applications
Lutetium oxide is used to make catalysts for cracking hydrocarbons in the petrochemical industry.

Lutetium aluminum garnet has been proposed for use as a lens material in high refractive index immersion lithography.

Lutetium is used as a phosphor in LED light bulbs.
Lutetium is considered to be non toxic
Isotoper
Stable Isotopes
175Lu
Unstable Isotopes
150Lu, 151Lu, 152Lu, 153Lu, 154Lu, 155Lu, 156Lu, 157Lu, 158Lu, 159Lu, 160Lu, 161Lu, 162Lu, 163Lu, 164Lu, 165Lu, 166Lu, 167Lu, 168Lu, 169Lu, 170Lu, 171Lu, 172Lu, 173Lu, 174Lu, 176Lu, 177Lu, 178Lu, 179Lu, 180Lu, 181Lu, 182Lu, 183Lu, 184Lu