The vibrational spectra of some antimony phosphates

Crystal structure and vibrational properies of Rb2MgWO2(PO4)2—A new framework phosphate

“…The translations of Rb + ions should be observed at very low wavenumbers, since rubidium-oxygen distances are large and the corresponding interactions have strongly ionic character. The studies of KTP located T 0 (K + ) modes at 96 and 120 cm À1 [29], whereas the study of potassium-antimony phosphates located these modes below 150 cm À1 [30]. On the other hand, in tungstates and perovskites the T 0 (W 6+ ) and L(WO 6 ) modes appeared below 150 cm À1 [31][32][33].…”

Effect of Cation/Anion Co‐doping on the Photocatalytic Performance of Na3SbO(PO4)2

“…The observed frequencies below 400 cm -1 are due to different bending vibrations of O-P-O, O-Sb-O, Sb-O-P and Sb-O-Sb. [8] The FT-IR spectra of NaSPON, AgSPON, and CuSPON in the 250-1300 cm -1 region is similar to that of parent NaSPO, AgSPO, and CuSPO. However, their spectra in the 1300-1700 cm -1 region is significantly different.…”

“…[8] However, the IR spectrum of Na 3 SbO(PO 4 ) 2 , to the best of our knowledge, is not reported. Therefore, the infrared spectra of all the compositions were recorded.…”

“…The observed vibrational bands are analyzed based on the comparison with related compounds. [8] The antisymmetric stretching vibrations of PO 4 tetrahedra are observed between 1290 and 1050 cm -1 and the symmetric stretching bands are found between 1000 and 880 cm -1 . The stretching vibrations of Sb-O-Sb bonds created by corner sharing linkage of SbO 6 octahedra are observed around 790 cm -1 .…”

Structure, infrared and Raman spectroscopic studies of newly synthetic AII(SbV0.50FeIII0.50)(PO4)2 (ABa, Sr, Pb) phosphates with yavapaiite structure

“…In the lattice modes region, the translational modes of Sr 2þ or Pb 2þ , Fe 3þ , Sb 5þ and PO 4 3À ions as well as librational modes of PO 4 3À ions and FeO 6 , SbO 6 groups should be expected. At wavenumbers below 450 cm À1 strong coupling between the different bending vibrations OePeO, OeSbeO, SbeOeP is expected [39]. The Raman bands observed at 364 and 370 cm À1 could be assigned to Fe 3þ -O stretching modes of vibrations similar to those observed in Li 3 Fe 2 (PO 4 ) 3 [40].…”