نيوديموميم (په انگرېزي : Neodymium ) له کیمیاوي عناصرو څخه یو دی چې په تناوبي جدول کې د Nd سمبول او ۶۰ اتمي شمېرې په وسیله ښودل شوی دی.
Neodymium, 60 Nd عمومي خواص Pronunciation / ˌ n iː . oʊ- ˈ d ɪ m i ə m / NEE -o-DIM -ee-əmAppearance silvery white Neodymium په دوراني جدول کې اټومي شمیره (Z ) 60 گروپ , پیریود group n/a , period 6 بلاک f-block Element category lanthanide معياري اټومي وزن (A r ) کينډۍ:Val [۱] Electron configuration [Xe ] 4f4 6s2 Electrons per shell
2, 8, 18, 22, 8, 2 فزیکي خواص حالت (at STP ) جامد دويلې کيدو ټکى 1297 K (1024 °C, 1875 °F) يشنا ټکی 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 vaporization 289 kJ/mol Molar heat capacity 27.45 J/(mol·K) Vapor pressure
P (Pa)
1
10
100
1 k
10 k
100 k
at T (K)
1595
1774
1998
(2296)
(2715)
(3336)
اټومي خواص Oxidation states +4, +3 , +2 (a mildly basic oxide)Electronegativity Pauling scale: 1.14 Ionization energies 1st: 533.1 kJ/mol 2nd: 1040 kJ/mol 3rd: 2130 kJ/mol Atomic radius empirical: 181 pm Covalent radius 201±6 pm Miscellanea Crystal structure double hexagonal close-packed (dhcp)Double hexagonal close packed crystal structure for neodymium Speed of sound thin rod 2330 m/s (at 20 °C) Thermal expansion α, poly: 9.6 µm/(m·K) (at r.t. ) د تودوخې تېرېدنه 16.5 W/(m·K) Electrical resistivity α, poly: 643 nΩ·m Magnetic ordering paramagnetic , antiferromagnetic below 20 K[۲] Magnetic susceptibility (χ mol ) +5628.0·10−6 cm3 /mol (287.7 K)[۳] 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 345–745 MPa Brinell hardness 265–700 MPa CAS Number 7440-00-8 History Discovery Carl Auer von Welsbach (1885) Main isotopes of neodymium
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