A novel beryllophosphate microporous crystal was synthesized hydrothermally, and the bigger singlg crystal was also obtained. The framework structure was found consisting of alternating PO4 tetrahedral and BeO4 tetrahedral by means of X-ray powder diffraction, four circle X-ray structural analysis, IR spectroscopy and etc. The crystal was crystallized in orthorhombic, space group Pna21. The unit cell parameter a=0.8699(1)nm, b=0.8567(1)nm, c=0.4953(2)nm, Z=4, the unit cell volume is 0.3691(7)nm^3. The final discrepany factor is R=0.054, and Rw=0.048. The microporous system is composed of four-, six- and eight-membered rings. The water molecules and the protons which balance the negative charges of anionic framework are located in the six-membered ring channel parallel to (100) direction. The thermal stability of the product was also studied.

Key words: INFRARED SPECTROPHOTOMETRY, CRYSTAL STRUCTURE, X-RAY DIFFRACTION ANALYSIS, THERMAL STABILITY