Erbium phosphate anhydrous (ErPO) is a rare-earth phosphate appearing as a pinkish-white crystalline powder insoluble in water with high thermal and chemical stability typical of xenotime or monazite structures.

Serves to encapsulate erbium ions for luminescent materials or stable matrices in high-temperature and radioactive environments.

Erbium phosphate anhydrous (ErPO) is a stable pinkish-white rare-earth phosphate compound with a xenotime crystal structure insoluble in water and valued for its high thermal stability.