Atomic arrangement of a zinc-tellurite glass

Role of nickel ion coordination on spectroscopic and dielectric properties of ZnF2–As2O3–TeO2:NiO glass system

“…Earlier neutron scattering experiments [21,22] and Raman spectral studies [23,24] on TeO 2 glasses containing different modifiers have revealed that the basic building block of TeO 2 glass structure is a trigonal bipyramid commonly called TeO 4 E, where one of the three equatorial directions is occupied by the 5s 2 electronic pair (E) of the tellurium atom with two equatorial bonds. The three-dimensional close packing is constituted from vertices sharing TeO 4 groups (Te eq -O ax -Te) reinforced by weaker Te-O interactions [25,26]. The environment of these Te atoms is completed by two other longer interactions of lengths 2.9 Å and the three dimensional close packing is constituted from vertices sharing TeO 4 groups (Te eq -O ax -Te) reinforced by weaker Te-O interactions of lengths 2.9 Å [19,25].…”

Preparation and characterization of lead and zinc tellurite glasses

“…Similar observations were reported by Babu et al on 10Li 2 O-xNb 2 O 5 -(89 À x)TeO 2 glass system, where the intensity of band at 668 cm À1 decreases while intensity of band at 763 cm À1 increases, with increase in Nb 2 O 5 concentration [37]. Neutron diffraction measurements on ZnO-TeO 2 glasses by Kozhukharov et al concluded that ZnO forms ZnO 6 polyhedra, which when incorporated between the tellurite network, results in the destruction of symmetry of TeO 4 units, thereby creating TeO 3+1 and/or TeO 3 units [38]. Earlier Hoppe et al determined Te-O and Zn-O coordination in zinc tellurite glasses by X-ray and neutron scattering measurements.…”

Effect of lithium addition on thermal and optical properties of zinc–tellurite glass

“…Recently, it has been found that the zinc tellurite glasses are very stable and have received great scientific interest because of zinc oxide can change the optical and physical properties of the tellurite glasses, where ZnO enter in the glass structure in the form of both network former and network modifier [1,6,7]. Zinc tellurite glasses have been investigated by using neutron diffraction [8] and vibrational spectroscopy [9,10]. It was found that the building units of these glasses are TeO 4 , TeO 3+1 and TeO 3 groups.…”