Abstract:　Properties　of　physical　and　chemical　for　lanthanum　cerium　fluoride　polishing　powder　were　characterized　by　techniques　of　X-ray　diffraction,　scanning　electron　microscopy.　Space　structures　-were　calculated　by　the　inorganic　crystal　structure　database　(ICSD)　,　and　wettability　and　polishing　performance　-was　done　using　contact　angle　measuring　equipment　and　surface　defect　detector.　It　-was　found　that　the　materials　are　all　made　up　of　agglomerated　near-spherical　particles.　Below　800　°C　,　the　product　is　a　mixture　of　cubic　Ce()2　and　trigonal　LaF3　,　while　a-bove　800　°C　,　it　is　a　mixture　of　cubic　Ce()2　and　tetragonal　LaOF.　When　the　calcination　temperature　is　850　°C　,　the　polishing　properties　of　the　products　is　the　best.　©　2024　Journal　of　Functional　Materials.　All　rights　reserved.