Erbium (Er)

Erbium (Er)


Atomic Number: 68

Atomic Weight: 167.259

Melting Point: 1802 K (1529°C or 2784°F)

Boiling Point: 3141 K (2868°C or 5194°F)

Density: 9.07 grams per cubic centimeter

Phase at Room Temperature: Solid

Element Classification: Metal

Period Number: 6

Group Number: none

Group Name: Lanthanide


Erbium has six stable isotopes but only Er-168 appears to have a well established application. Er-168 is used for the production of Er-169 which is used in form of citrate for the treatment of rheumatoid arthritis.

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