Preparation and properties of HZr2P3O12 and related compounds
Tóm tắt
HZr2P3O12 (H-form) was prepared in air at 650° C by de-ammoniation of NH4Zr2P3O12 (NH4-form) in order to study properties of proton in the NaZr2P3O12-type structure. Hydration of H-form took place at 70° C, 0.15 GPa, and the final product is (H3O)Zr2P3O12·O·17H2O (H3O-form). H- and H3O-forms reacted with alkali chloride solutions at 25° C. Rates of the exchange reactions were studied as a function of water content of H- and H3O-bearing compounds. The H-form showed an excellent selectivity for univalent cations in the order: ammonium < potassium < rubidium ≪ sodium, lithium.
Tài liệu tham khảo
H. Y-P. Hong,Mater. Res. Bull. 11 (1976) 173.
L. Hagman andP. Kierkegaard,Acta Chem. Scand. 22 (1968) 1822.
D. Tranqui, J. J. Capponi, J. C. Joubert andR. D. Shannon,J. Solid State Chem. 39 (1981) 219.
H. Kohler, H. Schulz andO. Melinikov,Mater. Res. Bull. 18 (1983) 1143.
C. Delmas, J-C. Viala, R. Olazcuaga, G. Le Flem, P. Hagenmuller, F. Cheraoui andR. Brochu,Solid State Ionics 3/4 (1981) 209.
P. C. Yao andD. J. Fray,ibid. 8 (1983) 35.
B. E. Taylor, A. D. English andT. Berzins,Mater. Res. Bull. 12 (1977) 171.
A. Clearfield, P. Jirustithipong, R. N. Cotman andS. P. Pack,ibid. 15 (1980) 1603.