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The physical properties of gallium are highly anisotropic, i.e. have different values along the three major crystallographic axes a, b, and c (see table), producing a significant difference between the linear (α) and volume thermal expansion coefficients. The properties of gallium are strongly temperature-dependent, particularly near the ...
Gallium nitride (Ga N) is a binary III/V direct bandgap semiconductor commonly used in blue light-emitting diodes since the 1990s. The compound is a very hard material that has a Wurtzite crystal structure. Its wide band gap of 3.4 eV affords it special properties for applications in optoelectronics, [9] [10] [11] high-power
Gallium reacts with ammonia at 1050 °C to form gallium nitride, GaN. Gallium also forms binary compounds with phosphorus, arsenic, and antimony: gallium phosphide (GaP), gallium arsenide (GaAs), and gallium antimonide (GaSb). These compounds have the same structure as ZnS, and have important semiconducting properties.
Gallium arsenide was first synthesized and studied by Victor Goldschmidt in 1926 by passing arsenic vapors mixed with hydrogen over gallium(III) oxide at 600 °C. [7] [8] The semiconductor properties of GaAs and other III-V compounds were patented by Heinrich Welker at Siemens-Schuckert in 1951 [9] and described in a 1952 publication. [10]
The table below is a summary of the key physical properties of the group 12 elements. ... though gallium participates in semi-conductors such as gallium arsenide. ...
Gallium(III) chloride is an inorganic chemical compound with the formula GaCl 3 which forms a monohydrate, GaCl 3 ·H 2 O. Solid gallium(III) chloride is a deliquescent white solid and exists as a dimer with the formula Ga 2 Cl 6. [2] It is colourless and soluble in virtually all solvents, even alkanes, which is truly unusual for a metal halide.
Also, it is formed on heating gallium in air or by thermally decomposing gallium nitrate at 200–250 °C. Crystalline Ga 2 O 3 can occur in five polymorphs, α, β, γ, δ, and ε. Of these polymorphs β-Ga 2 O 3 is the most thermodynamically stable phase at standard temperature and pressure [ 14 ] while α-Ga 2 O 3 is the most stable ...
Atomic number (Z): 31: Group: group 13 (boron group) Period: period 4: Block p-block Electron configuration [] 3d 10 4s 2 4pElectrons per shell: 2, 8, 18, 3: Physical properties; Phase at STP