Characteristic

Yttrium is a chemical element with the symbol Y and atomic number 39. It is a silvery-metallic transition metal chemically similar to the lanthanides and has often been classified as a "rare-earth element".

Phase at STP： solid

Melting point： 1799 K (1526 °C, 2779 °F)

Boiling point： 3203 K (2930 °C, 5306 °F)

Density (near r.t.)： 4.472 g/cm³

when liquid (at m.p.)： 4.24 g/cm³

Heat of fusion： 11.42 kJ/mol

Heat of vaporization： 363 kJ/mol

Molar heat capacity： 26.53 J/(mol·K)

Application

The most important uses of yttrium are LEDs and phosphors, particularly the red phosphors in television set cathode ray tube displays.[6] Yttrium is also used in the production of electrodes, electrolytes, electronic filters, lasers, superconductors, various medical applications, and tracing various materials to enhance their properties.