Halide precursors (HVPE)
Gallium Trichloride GaCl3
- Melting point 78°C
- Boiling point 201°C
- Condensed phase density 2.47g/cm3 (at 25°C)
- Molar mass 176.08 g/mol

Gallium Tribromide GaBr3
- Melting point 122°C
- Boiling point 279°C
- Condensed phase density 3.69g/cm3 (at 25°C)
- Molar mass 309.4g/mol
Gallium Triiodide GaI3
- Melting point 210°C
- Boiling point 346°C
- Condensed phase density 4.15g/cm3 (at 25°C)
- Molar mass 450.4g/mol
Metallic gallium chlorination
Gallium chlorides can be produced inside a reactor, by passing dry hydrogen chloride (HCl) or Chlorine (Cl2) gas over a boat with liquid gallium. The composition of produced chlorides mainly depends on chlorination temperature – at temperatures below ~350°C Gallium trichloride GaCl3 and it’s dimer Ga2Cl6 are main reaction products. At higher temperatures gallium monochloride GaCl becomes dominant.
