Hydrothermal Synthesis of Lithium Zinc Phosphates: Structural Investigation of Twinned α-Li4Zn(PO4)2 and a High Temperature Polymorph β-Li4Zn(PO4)2

Polymorphism in Li4Zn(PO4)2 and Stabilization of its Structural Disorder to Improve Ionic Conductivity

“…The measurements were carried out in the temperature range of 100-600 °C with an accuracy of ±1 °C and were soaked for 15 mins at each measurement temperature prior triggering each sweep of frequency dependent impedance measurement at the temperature. The α-Li 4 Zn(PO 4 ) 2 phase is known to undergo phase transition at high temperature to β-Li 4 Zn(PO 4 ) 2 , 27,26 but the crystal structure of β-Li 4 Zn(PO 4 ) 2 was never reported, to our best knowledge. Hence we have carried out systematic investigations of the phase transition and finally have been able to deduce a structural model for the β-Li 4 Zn(PO 4 ) 2 phase.…”

“…Fifteen years later, Jensen et al, have prepared the compound by hydrothermal method and described an accurate structural model for the α-phase. 27 However nobody has described the crystal structures of the high temperature phases till date. β-Li 4 Zn(PO 4 ) 2 has been speculated to be isostructural to γ-Li 3 PO 4 , 25,27 which is well-known since long as a good Li + conductor.…”

“…27 However nobody has described the crystal structures of the high temperature phases till date. β-Li 4 Zn(PO 4 ) 2 has been speculated to be isostructural to γ-Li 3 PO 4 , 25,27 which is well-known since long as a good Li + conductor. 21 More specifically, this compound can be viewed as Li 3 PO 4 with two Li + substituted by one Zn 2+ , and since there is no twofold positions in Li 3 PO 4 to accommodate the extra Zn 2+ , the Zn 2+ and vacancies are probably disordered in fourfold Li sites.…”

Lithium zincopyrophosphate, Li2Zn3(P2O7)2

“…The structures of several Li-Zn-P-O quaternary compounds have been reported, examples being -LiZnPO 4 (Elammari & Elouadi, 1989), 1 -LiZnPO 4 (Jensen et al, 1995), "-LiZnPO 4 (Bu et al, 1996), LiZnPO 4 -CR1 (Bu et al, 1998), and -Li 4 Zn(PO 4 ) 2 and -Li 4 Zn(PO 4 ) 2 (Jensen et al, 2002). All these compounds are orthophosphates and all the Zn atoms in these structures are tetrahedrally coordinated by O atoms, with an average Zn-O distance of 1.95 (1) Å .…”

Deflagration products from emulsion explosive unconventional nano-powders from ion reaction

“…A zinc and lithium composite oxide is the subject of growing interest for different applications in electronic components [1][2][3][4]. Especially, G.Ceder regarded that LiZnO 2 compound has a higher voltage than that of LiCoO 2 [5].…”