ReGaGe₂: an intermetallic compound with semiconducting properties and localized bonding

Abstract

ReGaGe2 is a new intermetallic compound with semiconducting properties and localized bonding patterns.

Intermetallic Compound Re2Ga9Ge with Re- and Ge-Embedded Gallium Clusters: Synthesis, Crystal Structure, Chemical Bonding, and Physical Properties

“…The absence of the homogeneity range of Re 2 Ga 9 Ge, despite similar atomic sizes of gallium and germanium and their neighboring positions in the Periodic Table, is not surprising. Similar behavior was observed earlier, when we discovered three compounds in the Re–Ga–Ge system: ReGa 2 Ge, ReGaGe 2 , and ReGa 0.4 Ge 0.6 , which also showed no noticeable homogeneity range.…”

“…When using the flux of gallium with tin, lead, or bismuth, crystals of the ReGa ∼5 M (M = Sn, Pb, Bi) ternary compounds can be isolated . In the Re–Ga–Ge system, two narrow-gap semiconductors, ReGa 2 Ge and ReGaGe 2 , with endohedral cluster frameworks formed by gallium and germanium species, were recently discovered. Also, in the Re–Ga–Si system, semiconducting ReGaSi with a close-packed structure derived from the MoSi 2 -type was obtained. , …”

Electron-Precise Semiconducting ReGa2Ge: Extending the IrIn3 Structure Type to Group 7 of the Periodic Table

“…No direct E–E bonds are observed, which is also consistent with long interatomic distances. This constitutes a major difference between bonding pattern for this compound and previously discovered phase with the same Re to E ratio, ReGaGe 2 , in which the Re–Ge and Re–Ga covalent bonds are accompanied by strong pairwise E–E interactions.…”

“…Accordingly, the samples with x > 0 lie in the Re–ReGa 5 –ReGa 2 Ge compositional triangle. The decrease of the gallium content leads to the admixture of ReGaGe 2 , such that the compositions with x < 0 reside on the ReGa 2 Ge–ReGaGe 2 cut. The unit cell parameters of the ReGa 2 Ge phase determined for the samples with the nominal composition in the range of −0.04 ≤ x ≤ 0.04 remain unchanged within the accuracy of determination (see inset in Figure ).…”

Synthesis and study the crystal structure of polycrystalline a novel type phase in Zn- Pb- Zr intermetallic alloy by ab initio method via powder XRD system

“…Large volume change in metallic Zn-anodes during charge reaction limits them from practical applications despite the advantages. Intermetallic alloy anodes can successfully lower the volume change upon alkali-ion interaction [6][7][8][9]. Therefore, a variety of binary and ternary Zn-based intermetallic anodes have been explored so far.…”