Abstract: The far red phosphorLi₆(La₂Ca)Nb₂O₁₂∶Mn⁴⁺ with nonrareearth doping was prepared by high temperature solidstate method. The crystal structure and luminescent properties of the phosphor were studied by Xray diffraction and
 sepectroscopy. The results show that the fluorescence spectrum of Li₆(La₂Ca)Nb₂O₁₂∶Mn⁴⁺ has two broad excitation bands in the center of 327,494 nm. A far red emission peak of Li₆(La₂Ca)Nb₂O₁₂∶Mn⁴⁺ phosphor can be 
observed at 700 nm due to the ²E_g→⁺⁴A_2gtransition of Mn⁴⁺ ion. The calculated activation energy ΔE=0.437 eV. The phosphor has good thermal stability.

Key words: red phosphor,  , plant lighting, doping, luminescent property