Lantaani

Kemiallinen merkki: La
Järjestysluku: 57
Kategoria: lantanoidit
Ryhmä: 3
Jakso: 6
Lohko: f
Moolimassa: 138,90547 g/mol
Elektronia kuorilla: 2, 8, 18, 18, 9, 2
CAS-numero: 7439-91-0
Olomuoto: kiinteä
Tiheys: 6,162 kg/l (lähellä huoneenlämpöä)
Sulamispiste: 1193 K (920 °C, 1688 °F)
Kiehumispiste: 3737 K (3464 °C, 6267 °F)
Kiderakenne: hexagonal
Hapetusluvut: 3
Elektronegatiivisuus: 1,10 (Pauling-asteikko)
Nimen alkuperä: lanthano
Nimen tarkoitus: a Greek word which means 'to lie hidden'
Faktoja:
- is found in some rare-earth minerals, usually in combination with cerium and other rare earth elements
- is malleable, ductile, and soft enough to be cut with a knife
- is one of the most reactive of the rare-earth metals
- reacts directly with elemental carbon, nitrogen, boron, selenium, silicon, phosphorus, sulfur, and with halogens
- oxidizes rapidly when exposed to air
- has no known biological role
- uses include carbon lighting applications, metal additive, petroleum cracking catalysts, glass polishing compound etc,