کينډۍ:Infobox erbium

Erbium,  ₆₈Er

عمومي خواص
Pronunciation	/ˈɜrbiəm/ UR-bee-əm
Appearance	silvery white
Erbium په دوراني جدول کې
– ↑ Er ↓ Fm holmium ← erbium → thulium ‍
اټومي شمیره (Z)	68
گروپ, پیریود	group n/a, period 6
بلاک	f-block
Element category	lanthanide
معياري اټومي وزن (Ar)	کينډۍ:Val
Electron configuration	[Xe] 4f12 6s2
Electrons per shell	2, 8, 18, 30, 8, 2
فزیکي خواص
حالت (at STP)	جامد
دويلې کيدو ټکى	1802 K ​(1529 °C, ​2784 °F)
يشنا ټکی	3141 K ​(2868 °C, ​5194 °F)
Density near r.t.	9.066 g/cm3
when liquid, at m.p.	8.86 g/cm3
Heat of fusion	19.90 kJ/mol
Heat of vaporization	280 kJ/mol
Molar heat capacity	28.12 J/(mol·K)
Vapor pressure P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 1504 1663 (1885) (2163) (2552) (3132)
اټومي خواص
Oxidation states	3, 2, 1 ​(a basic oxide)
Electronegativity	Pauling scale: 1.24
Ionization energies	1st: 589.3 kJ/mol 2nd: 1150 kJ/mol 3rd: 2194 kJ/mol
Atomic radius	empirical: 176 pm
Covalent radius	189±6 pm
Miscellanea
Crystal structure	​hexagonal close-packed (hcp) Hexagonal close packed crystal structure for erbium
Speed of sound thin rod	2830 m/s (at 20 °C)
Thermal expansion	poly: 12.2 µm/(m·K) (r.t.)
د تودوخې تېرېدنه	14.5 W/(m·K)
Electrical resistivity	poly: 0.860 µΩ·m (r.t.)
Magnetic ordering	paramagnetic at 300 K
Magnetic susceptibility (χmol)	+44,300.00·10−6 cm3/mol
Young's modulus	69.9 GPa
Shear modulus	28.3 GPa
Bulk modulus	44.4 GPa
Poisson ratio	0.237
Vickers hardness	430–700 MPa
Brinell hardness	600–1070 MPa
CAS Number	7440-52-0
History
Naming	after Ytterby (Sweden), where it was mined
Discovery	Carl Gustaf Mosander (1842)
Main isotopes of erbium
آيسو­ټوپ Abun­dance نیم ژوند (t1/2) Decay mode Pro­duct 160Er syn 28.58 h ε 160Ho 162Er 0.139% stable 164Er 1.601% stable 165Er syn 10.36 h ε 165Ho 166Er 33.503% stable 167Er 22.869% stable 168Er 26.978% stable 169Er syn 9.4 d β− 169Tm 170Er 14.910% stable 171Er syn 7.516 h β− 171Tm 172Er syn 49.3 h β− 172Tm

Element navigation

PTerbiumPT

Ho ←

iso 68Er ibox    wd:Q1849

→ Tm

سرچينې

د سرچينو همدا لړليک په ليکنه کې نه ښکاري.

کينډۍ لاسوند[جوړول]