لوتيتيوم

Lutetium,  ₇₁Lu

عمومي خواص
Pronunciation	/ljuːˈtiːʃiəm/ lew-TEE-shee-əm
Appearance	silvery white
Lutetium په دوراني جدول کې
– ↑ Lu ↓ Lr ytterbium ← lutetium → hafnium ‍
اټومي شمیره (Z)	71
گروپ, پیریود	group n/a, period 6
بلاک	f-block
Element category	lanthanide, sometimes considered a transition metal
معياري اټومي وزن (Ar)	کينډۍ:Val[۱]
Electron configuration	[Xe] 4f14 5d1 6s2
Electrons per shell	2, 8, 18, 32, 9, 2
فزیکي خواص
حالت (at STP)	جامد
دويلې کيدو ټکى	1925 K ​(1652 °C, ​3006 °F)
يشنا ټکی	3675 K ​(3402 °C, ​6156 °F)
Density near r.t.	9.841 g/cm3
when liquid, at m.p.	9.3 g/cm3
Heat of fusion	ca. 22 kJ/mol
Heat of vaporization	414 kJ/mol
Molar heat capacity	26.86 J/(mol·K)
Vapor pressure P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 1906 2103 2346 (2653) (3072) (3663)
اټومي خواص
Oxidation states	3, 2, 1 ​(a weakly basic oxide)
Electronegativity	Pauling scale: 1.27
Ionization energies	1st: 523.5 kJ/mol 2nd: 1340 kJ/mol 3rd: 2022.3 kJ/mol
Atomic radius	empirical: 174 pm
Covalent radius	187±8 pm
Miscellanea
Crystal structure	​hexagonal close-packed (hcp)
Thermal expansion	poly: 9.9 µm/(m·K) (at r.t.)
د تودوخې تېرېدنه	16.4 W/(m·K)
Electrical resistivity	poly: 582 nΩ·m (at r.t.)
Magnetic ordering	paramagnetic[۲]
Young's modulus	68.6 GPa
Shear modulus	27.2 GPa
Bulk modulus	47.6 GPa
Poisson ratio	0.261
Vickers hardness	755–1160 MPa
Brinell hardness	890–1300 MPa
CAS Number	7439-94-3
History
Naming	after Script error: The function "Lang" does not exist., Latin for: Paris, in the Roman era
Discovery	Carl Auer von Welsbach and Georges Urbain (1906)
First isolation	Carl Auer von Welsbach (1906)
Named by	Georges Urbain (1906)
Main isotopes of lutetium
آيسو­ټوپ Abun­dance نیم ژوند (t1/2) Decay mode Pro­duct 173Lu syn 1.37 y ε 173Yb 174Lu syn 3.31 y ε 174Yb 175Lu 97.401% stable 176Lu 2.599% 3.78×1010 y β− 176Hf
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لوتيتيوم (په انگرېزي: Lutetium) له کیمیاوي عناصرو څخه یو دی چې په تناوبي جدول کې د Lu سمبول او v۱ اتمي شمېرې په وسیله ښودل شوی دی.

1. ↑ Meija, J.; Coplen, T. B. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure Appl. Chem. 88 (3): 265–91. doi:10.1515/pac-2015-0305. {{cite journal}}: Unknown parameter |displayauthors= ignored (|display-authors= suggested) (help)
2. ↑ Lide, D. R., ed. (2005). "Magnetic susceptibility of the elements and inorganic compounds". CRC Handbook of Chemistry and Physics (PDF) (86th ed.). Boca Raton (FL): CRC Press. ISBN 0-8493-0486-5.