Raman measurements of temperature dependencies of phonons in LiMnPO4

► Temperature induced changes of phonon frequencies were observed in LiMnPO4. ► The Grüneisen parameters were determined for 5 phonon modes. ► The change of frequency of the symmetric Agν1 mode was small. ► The thermal dependencies of the antisymmetric modes (Agν3 and Agν4) were stronger.