Neodyymi

Kemiallinen merkki: Nd
Järjestysluku: 60
Kategoria: lantanoidit
Ryhmä: n/a
Jakso: 6
Lohko: f
Moolimassa: 144,242 g/mol
Elektronia kuorilla: 2, 8, 18, 22, 8, 2
CAS-numero: 7440-00-8
Olomuoto: kiinteä
Tiheys: 7,01 kg/l (lähellä huoneenlämpöä)
Sulamispiste: 1297 K (1024 °C, 1875 °F)
Kiehumispiste: 3347 K (3074 °C, 5565 °F)
Kiderakenne: hexagonal
Hapetusluvut: 3
Elektronegatiivisuus: 1,14 (Pauling-asteikko)
Nimen alkuperä: neos and didymos
Nimen tarkoitus: Greek words which mean new and twin
Faktoja:
- is present in Mischmetal to the extent of about 18%
- has a bright, silvery metallic luster; however, as one of the more reactive rare earth (Lanthanide) metals, it quickly oxidizes in air
- the oxide layer then falls off, which exposes the
- although a rare earth metal, neodymium is not rare at all - it constitutes 38 ppm of the Earth's crust
- neodymium magnets are the strongest permanent magnets known
- is frequently misspelled as neodynium
- is never found in nature as the free element; rather, it occurs in ores such as monazite sand
- neodymium metal dust is a combustion and explosion hazard
- commercially available magnets made from neodymium are exceptionally strong, and can attract each other from large distances - if not handled carefully, they could come together very quickly and forcefully, causing injuries