Ytterbium (Yb)

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Ytterbium 70Yb173.04


1878 von J.C.G. de Marignac in Genf, Schweiz, entdeckt.

[Nach Ytterby, Schweden, bennant]

French: ytterbium
English: ytterbium
Italian: itterbio
Spanish: yterbio


Beschreibung: Weiches, silberweißes Metall der Lanthanoid-Gruppe. Wird von Luft langsam oxidiert, reagiert mit Wasser.

  


Further Materials properties

 

Crystal structure:

(cell dimensions/pm), space group, 
α-Yb f.c.c. (a=548.62), Fm3m
β-Yb b. c.c. (a=444), Fm3m
T (α -> β) = 1 073K

X-ray diffractions mass absorption coefficients: CuKa 146(µ/r) / cm2g-1
MoKa 84.5 (µ/r) / cm2g-1
Neutron scattering length: 1.243 b/10-12 cm
Thermal neutron capture cross-section: 34.8 sa / barns
Density: 6965 kg/m-3 [293 K]
Melting point: 823.85°C / 1097°K
Boiling point: 1192.85°C / 1466°K
Molar volume: 24.84 cm3
Thermal conductivity: 34.9 [300 K] W m-1K-1
Coefficient of linear thermal expansion: 25.0 x 10-6 (a axis); 6.1 x 10-6 (b axis); 6.8 x 10-6 (c axis) K-1
Electrical resistivity: 29.0 x 10-8 [273 K] Ωm
Mass magnetic susceptibility: +1.81 x 10-8(s) kg-1m3
Radi: Yb3+ 86; Yb2+ 113; atomic 194; covalent 170
Electronegativity: n.a. (Pauling); 1.06 (Allred); ≤3.5 eV (absolute)
Effective nuclear charge: 2.85 (Slater); 8.59 (Clementi); 11.90 (Froese-Fischer)
Number of Isotopes (incl. nuclear isomers): 29
Isotope mass range: 154 -> 179

 

 


Biological data

 

Biological role: None, but acts to stimulate metabolism.
Toxicity
Toxic intake: n.a.
Lethal intake: LD50 (chloride, oral, mouse) = 6700 mg kg-1
Hazards: Ytterbium is mildly toxic by ingestion and is a skin and eye irritant. It is also a suspected teratogen..
Level in humans n.a. but very low
Daily dietary intake: n.a. 
Total mass of element in average
[70 kg] person:
n.a. 


Geological data

 

Minerals:
MineralFormulaDensityHardnessCrystal apperance
Euxenite*  (Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6 5.0  5.5 - 6.5  orth., met. greasy black
Xenotime*  YPO4 4.8  4 - 5  tet., vit./res. yellow-brown

* These ores contain extractable amounts of ytterbium.

Chief ores: euxenite, xenotime
World production: c. 50 tonnes/year
Main mining areas: USA, Canada. Euxenite is also found in Greenland and Brazil
Reserves: c. 1 x 106.
Specimen: available as chipes or ingots. Safe. Yb powder is a skin and eye irritant. Care!

 

Abundances  
Sun: 8 (relative to H = 1 x 1012)
Earth's crust: 3.3 ppm
Seawater
Atlantic surface:  5 x 10-7 ppm
Atlantic deep:  7.5 x 10-7 ppm
Pacific surface:  3.7 x 10-7 ppm
Pacifc deep:  22 x 10-7 ppm
Residence time:  400 years
Classification:  recycled
Oxidation state:  III

  Source: Emsley, J. (1998) The Elements (3rd Edition)

Other sizes and specifications on request


Übersicht der Elemente mit Zugang zu unserem Shop

1 18
H
2 13 14 15 16 17
He
Li Be B C
N
O
F
Ne
Na Mg 3 4 5 6 7 8 9 10 11 12 Al Si P S
Cl
Ar
K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se
Br
Kr
Rb Sr Y Zr Nb Mo
Tc
Ru Rh Pd Ag Cd In Sn Sb Te I
Xe
Cs Ba La Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi
Po
At
Ra
Fr
Ra
Ac
Ce Pr Nd
Pm
Sm Eu Gd Tb Dy Ho Er Tm Yb Lu


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