摘要:
Addition of KOH to aqueous solutions containing in a 3 : I molar ratio chloromethanephosphonic acid (H2L) and rare-earth ions (Ln(3+)) results in crystallization of LnHL(2) (Ln = La-Er, Y) and KLn(3)H(6)L(8) (Ln = Yb, Lu). According to powder diffraction patterns, all the compounds within the LnHL2 and KLn(3)H(6)L(8) groups are isostructural. Thulium forms a mixture of these two compounds. The solubility, IR spectra, and thermal stability of the products were studied.