ଛାଞ୍ଚ:Infobox Neodymium

Neodymium,  ₆₀Nd

ସାଧାରଣ ଗୁଣ
ନାମ, ପ୍ରତୀକ	neodymium, Nd
Appearance	silvery white
ଉଚ୍ଚାରଣ	/ˌniː.ˈdɪmiəm/ NEE-o-DIM-ee-əm
Neodymium in the periodic table
- ↑ Nd ↓ U praseodymium ← neodymium → promethium
ପରମାଣୁ କ୍ରମାଙ୍କ (Z)	60
ଶ୍ରେଣୀ, ବ୍ଳକ	group n/a, f-block
ପର୍ଯ୍ୟାୟ	period 6
ମୌଳିକ ପ୍ରକାର	lanthanide
ମାନକ ପରମାଣବିକ ଓଜନ (Ar)	144.242
ଇଲେକ୍‌ଟ୍ରୋନ୍ ବିନ୍ୟାସ	[Xe] 4f4 6s2
per shell	2, 8, 18, 22, 8, 2
ଭୌତିକ ଗୁଣ
ଅବସ୍ଥା	solid
ଗଳନାଙ୍କ	1297 K ​(1024 °C, ​1875 °F)
ସ୍ଫୁଟନାଙ୍କ	3347 K ​(3074 °C, ​5565 °F)
Density near r.t.	7.01 g/cm3
when liquid, at m.p.	6.89 g/cm3
Heat of fusion	7.14 kJ/mol
Heat of	289 kJ/mol
Molar heat capacity	27.45 J/(mol·K)
pressure P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 1595 1774 1998 (2296) (2715) (3336)
Atomic properties
Oxidation states	3, 2, 1 (mildly basic oxide)
Electronegativity	Pauling scale: 1.14
Atomic radius	empirical: 181 pm
Covalent radius	201±6 pm
Miscellanea
Crystal structure	​hexagonal
Speed of sound thin rod	2330 m/s (at 20 °C)
Thermal expansion	(r.t.) (α, poly) 9.6 µm/(m·K)
Thermal conductivity	16.5 W/(m·K)
Electrical resistivity	(r.t.) (α, poly) 643 n Ω·m
Magnetic ordering	paramagnetic, antiferromagnetic below 20 K
Young's modulus	(α form) 41.4 GPa
Shear modulus	(α form) 16.3 GPa
Bulk modulus	(α form) 31.8 GPa
Poisson ratio	(α form) 0.281
Vickers hardness	343 MPa
Brinell hardness	265 MPa
CAS Number	7440-00-8
ଇତିହାସ
ଆବିଷ୍କାର	Carl Auer von Welsbach (1885)
Most stable isotopes of neodymium
iso NA half-life DM DE (MeV) DP 142Nd 27.2% 142Nd is stable with 82 neutrons 143Nd 12.2% 143Nd is stable with 83 neutrons 144Nd 23.8% 2.29×1015 y α 1.905 140Ce 145Nd 8.3% >6×1016 y α 1.5784 141Ce 146Nd 17.2% 146Nd is stable with 86 neutrons 148Nd 5.7% >3.0×1018 y α 0.5986 144Ce β−β− 1.9288 148Sm 150Nd 5.6% 6.7×1018 y β−β− 3.367 150Sm

References

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