Triphylite is a lithium iron(II) phosphate mineral with the chemical formula LiFePO4.

[6] It is a member of the triphylite group and forms a complete solid solution series with the lithium manganese(II) phosphate, lithiophilite.

It rarely forms prismatic crystals and is more frequently found in hypidiomorphic rock.

The mineral was first discovered and examined in 1834 by German mineralogist Johann Nepomuk von Fuchs at Hennenkobel Mine in the Bavarian Forest.

[7][8] The name derives from the Greek words tri ("three") and phulon ("family"), referring to the three cations found in natural samples of triphylite (Li+, Fe2+, Mn2+).