Holmium Reference Libraries
Erbium is a chemical element with the symbol Er and atomic number 68. Erbium is a rare, silvery-white metallic lanthanide (an element having an atomic number between 57 and 71). It is found solid in its natural state and is commonly found with several other elements in the mineral gadolinite. It is found in Ytterby, Sweden. Erbium was discovered by Carl Gustaf Mosander in 1843. Mosander...
- The horn of a unicorn considered as a medical or pharmacological ingredient.
- A winged horse with a single horn on its head; a winged unicorn.