Structure and properties of high Li2O-containing aluminophosphate glasses

Role of Al coordination in barium phosphate glasses on the emission features of Ho3+ ion in the visible and IR spectral ranges

“…This region may also consist of bands due to pyrophosphate groups (P 2 O 7 4 À ) [22,23]. Two new bands at 773 and 466 cm À 1 idnetified due to AlO 4 structural and AlO 6 structural units respectively [24][25][26] have also been observed. As the concentration of Al 2 O 3 is increased up to 3.0 mol%, the bands due to AlO 6 units and due to PO 2 À groups are observed to grow whereas the bands due to PO 4 3 À groups and AlO 4 structural units exhibit a slight decay.…”

Studies on lithium alumino phosphate glasses doped with selenium ions for hard electrolytes

“…The bands cited at *1229, *1007, *787, *724, *545, and *449 cm -1 for LAPS 0 glass sample are shown in Fig. 3 and their modification of intensity with the shift of all the band positions from the glass sample LGPS 0 to LGPS 12 as follows [9,[17][18][19]: Table 1 Summary of DTA data for all the samples of LAPS glass system A band cited in the region *785-851 cm -1 , which is identified due to network forming AlO 4 tetrahedral groups.…”

Role of Al2O3 in upconversion and NIR emission in Tm3+ and Er3+ codoped calcium fluoro phosphorous silicate glass system

“…2) exhibited vibrational bands at 1293 cm À 1 (due to anti-symmetrical vibrations of PO À 2 =P ¼ O stretching vibrations), 1089 cm À 1 (due to symmetric stretching vibrations of PO 3À 4 group) and 934 cm À 1 (due to P-O-P asymmetric bending vibrations) [37,38]. Band due to AlO 4 structural units is observed at about 820 cm À 1 [39][40][41]; in the same region the bands due to phosphate, silicate structural units are also present. Hence this band may be attributed to the common stretching vibrations of AlO 4 , PO 4 and SiO 4 structural units.…”