(H 3 O)Ca 2 Zn 3.5 (PO 4 ) 4 and Ba 2 Cd 3 (PO 4 ) 2 (HPO 4 ) 2 : Syntheses, crystal structures and characterizations of two mixed metal phosphates

Syntheses, Crystal Structures and Luminescent Properties of Two New Heterometallic Phosphates: Sn2Ge(PO4)2(OH)2 and Sn2Mn(PO4)2

“…The P–O bond lengths vary from 1.526(3) to 1.546(3) Å and the O–P–O bond angles are in the range of 106.51(19)°–112.4(2)°. All these bond lengths and bond angles values are comparable to the previous reported compounds . In addition, BVSs calculation for Sn(1), Mn(1), and P(1) are 1.69, 1.97, and 4.77, respectively (Table S2), indicating the formal oxidation states of +2 for Sn, +4 for Mn and +5 for P atoms …”

“…The strong absorption bands at 1040, 982 and 1005 cm −1 for both compounds are attributed to the stretching vibrations in the PO 4 groups. The bands at 662/604 cm −1 and 573/542 cm −1 might be ascribed to the bending vibrations of the O−P−O bonds of PO 4 groups …”

Novel antimony phosphates with enlarged birefringence induced by lone pair cations

“…S4,† the cutoff edge of CsSbPO is about 213 nm (corresponding to a band gap of 5.82 eV using the Kubelka–Munk equation), which is comparable to the ones of other phosphates, such as LiMP 2 O 6 (M = Rb, Cs) (<210 nm), 78 LiZnP 3 O 9 (204 nm), 79 CsPbP 3 O 9 (<220 nm), 80 K 2 RbSc(PO 4 ) 2 (<207 nm), 81 K 3 Al 2 (PO 4 ) 3 (238 nm), 82 and (H 3 O)Ca 2 Zn 3.5 (PO 4 ) 4 (218 nm). 83 The results speculate that CsSbPO can be used as potential UV optical materials.…”

Syntheses, crystal structures and optical properties of two one-dimensional germanophosphates: HRb3Ge2(HPO4)6 and CsGe(HPO4)2(OH)

“…The strong absorption bands at 1140/1149 and 1000/1027 cm À1 for both compounds are attributed to stretching vibrations in the HPO 4 groups. The absorption bands at low-frequency regions, such as 663/646 and 575/531 cm À1 for 1 and 2, respectively, are mainly ascribed to the vibrational modes of the HPO 4 and GeO 6 groups (Huang et al, 2015;Chang et al, 2017;He et al, 2013;Zhao et al, 2018). Specifically, the presence of the -OH group is confirmed by the observation of characteristic peaks at low-frequency regions, such as 3469, 2814 and 2470 cm À1 , for the asymmetric O-H stretching and at $1769 cm À1 for the H-O-H bending mode of compound 2 (Yang et al, 2007;Liu et al, 2009;Han et al, 2016;Li et al, 2017).…”