& Kristalle GmbH
-
English
-
Deutsch
No products
Prices are tax excluded
Erbium (Er)
We are a leading manufacturer and supplier of research materials
Erbium 68Er167.26
Discovered in 1842 by C.G. Mosander at Stockholm, Sweden.
[Named after Ytterby, Sweden]
French: erbium
German: Erbium
Italian: erbio
Spanish: erbio
Description: Erbium is a silvery metal of the so-called rare earth goup (more correctly termed the lanthanides). It slowly tarnishes in air, reacts slowly with water, and dissolves in acids. Erbium is used in infrared-absorbing glass and in alloys with titanium.
Further Materials properties
| Crystal structure: |
(cell dimensions/pm), space group, |
|---|---|
| X-ray diffractions mass absorption coefficients: | CuKa 134 (µ/r) / cm2g-1 MoKa 77.3 (µ/r) / cm2g-1 |
| Neutron scattering length: | 0.816 b/10-12 cm |
| Thermal neutron capture cross-section: | 160 sa / barns |
| Density: | 9066 kg/m-3 [298 K] |
| Melting point: | 1528,85°C / 1802°K |
| Boiling point: | 2862,85°C / 3136°K |
| Molar volume: | 18.44 cm3 |
| Thermal conductivity: | 14.3 [300 K] W m-1K-1 |
| Coefficient of linear thermal expansion: | 9,2 x 10-6 K-1 |
| Electrical resistivity: | 87 x 10-8 [298 K] Ωm |
| Mass magnetic susceptibility: | +3.33 x 10-6(s) kg-1m3 |
| Young's modulus: | 69.9 GPa |
| Rigidity modulus: | 28.3 GPa |
| Bulk modulus: | 44.4 GPa |
| Poisson's ratio: | 0.237 GPa |
| Radi: | Er3+ 89; atomic 176; covalent 157 |
| Electronegativity: | 1.24 (Pauling); 1.14 (Allred); ≤3.3 eV (absolute) |
| Effective nuclear charge: | 2.85 (Slater); 8.48 (Clementi); 11.70 (Froese-Fischer) |
| Number of Isotopes (incl. nuclear isomers): | 25 |
| Isotope mass range: | 150-> 173 |
Biological data
| Biological role: | None, but acts to stimulate metabolism. |
|---|---|
| Toxicity | |
| Toxic intake: | n.a. |
| Lethal intake: | LD50 (chloride, oral, mouse) = 6200 mg Kg-1 |
| Hazards: | Cerium is mildly toxic by ingestion. |
| Level in humans | n.a. but low |
| Blood: | n.a. |
| Bone: | n.a. |
| Liver: | n.a. |
| Muscle: | n.a. |
| Daily dietary intake: | n.a. |
| Total mass of element in average [70 kg] person: |
n.a. |
Geological data
| Minerals: | ||||
|---|---|---|---|---|
| Mineral | Formula | Density | Hardness | Crystal apperance |
| Bastnäsite* | (Ce, La, etc.) CO3F | 4.9 | 4 - 4.5 | mon., waxy/ vit. yellow |
| Monazite* | (Ce, La, Nd, Th, etc.)PO4 | 5.20 | 5 - 5.5 | mon., waxy/ vit. yellow-brown |
* Although not a major constituent, erbium is present in extractable amounts.
| Chief ores: | monazite, bastnäsite |
|---|---|
| World production: | c. 500 tonnes/year |
| Main mining areas: | USA, Brazil, India, Sri Lanka, Australia |
| Reserves: | c. 1 x 106 tonnes |
| Specimen: | available as chips, ingots or powder. Safer. |
| Abundances | |
|---|---|
| Sun: | 5.8 (relative to H = 1 x 1012) |
| Earth's crust: | 3.8 ppm |
| Seawater | |
| Altantic surface: | 5.9 x 10-7 ppm |
| Atlantic deep: | 8.6 x 10-7 ppm |
| Pacific surface: | n.a. |
| Pacific deep: | n.a. |
| Residence time: | 400 years |
| Classification: | recycled |
| Oxidation state: | III |
Source: Emsley, J. (1998) The Elements (3rd Edition)
Other sizes and specifications on request
Overview of elements with access to our shop
Fax: +49 (0) 2461 - 9352 - 11