LaPO
4: Ce,Tb particles were prepared by precipitation from homogeneous solution using urea and hexamethylenetetramine (HMT). Effects of increasing molar concentration of cation and anion, adding hydroxylic carboxylic acid on the morphology and photoluminescence properties of LaPO
4: Ce, Tb phosphor were investigated. Prepared LaPO
4 was hydrate. The particles were needle-like shaped when using urea as a precipitant and rod shaped when using HMT. Both particle lengths were about 2 μm. Increasing molar concentration of H
3PO
4, the formed particles were smaller than that synthesized by the stoichiometric ratio and strongly agglomerated. Adding hydroxylic carboxylic acid as additives, the morphology of particles turned into various form such as spherical, cubic, rectangular and cross shape. However the morphology of LaPO
4: Ce, Tb phosphor was not homogeneous because of the morphology of TbPO
4 and CePO
4 which were bonding rod and cone. The prepared LaPO
4: Ce, Tb phosphor showed strong green emission by UV excitation. The luminescence intensity was stronger when using urea rather than HMT.
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