Structural and vibrational study a new potassium lithium ă dihydrogenphosphate KLi(H2PO4)(2)
Résumé
The single crystal of potassium lithium dihydrogenphosphate ă KLi(H2PO4)(2) (notated as KLDP) was synthesized at room temperature and ă its structure determined by single crystal X-ray diffraction. The ă compound was found to crystallize in the monoclinic system with space ă group P2(1)/c (No.14) and the following parameters a = 7.5197(6), b = ă 12.8943(10) and c = 7.3900(6)angstrom, beta = 98.477(3)degrees, Z = 4. ă This feature structure consists of LiO4 tetrahedra linked by corners ă with H2PO4 groups to form infinite layer running along the ab plane. In ă the interlayer, KO8 polyhedra form layers parallel to the same plane. In ă addition, Raman and infrared spectra were measured at room temperature, ă which confirm the presence of H2PO4, LiO4 groups and ABC bands in the ă unit cell. In fact, these fundamental vibrations were proposed by ă analogy with spectra of other phosphate-based hydrogen-bonded compounds.