Ge and Ga K-edge EXAFS analyses on the structure of Ge–Ga–S–CsBr glasses

Local motifs in GeS2–Ga2S3 glasses

“…The Ge-S and Ga-S distances agree with the literary values [40][41][42]. Due to the lower concentration of Ga, the uncertainty of Ga-Ga bond length is somewhat higher.…”

“…These works also use several different methods such as Raman [12,[36][37][38][39], XAFS [40], neutron diffraction [41], EXAFS [42], XRD and Raman [43], 2D micro-Raman [44]. They have all found that Ge and Ga atoms are equally fourfold coordinated, [GaS 4 ] and [GeS 4 ] tetrahedral units are cross-linked via bridging sulfur atoms, M-chalcogen bonds are preferable.…”

Preparation and properties of GeSe2-Ga2Se3-KBr new chalcohalide glasses

“…Similar to other chalcohalide glass, when KBr is added in Ge-Ga-Se glasses, [GaSe 3 Br] and [Se 3 Ga-Br-GaSe 3 ] structural units may be formed because the halogens were preferentially bonded to Ga [6,7]. The luminescence properties of rare earth ions in other similar chalcohalide glass systems indicated the glass structure is sensitive to the Fig.…”

Enhancing fluorescence emission properties of Dy3+ doped in chalcogenide glass via very small compositional modifications

“…As mentioned above, as for the lifetime enhancing mechanisms associated with the chalcogenide glasses modified with Ga and alkali halide, the [GaS 3/2 Br] À units play a critical role, formation of which was proved via the Ga K-edge EXAFS spectroscopic analyses [10,19]. These tetrahedral units necessitate to be electrically neutralized with positively charged ions, and thereby RE ions together with alkali ions act most presumably as charge compensators.…”