Gallium hydroxide, Ga(OH)₃ is formed as a gel following the addition of ammonia to Ga³⁺ salts.Anthony John Downs, (1993), ''Chemistry of Aluminium, Gallium, Indium, and Thallium'', Springer, It is also found in nature as the rare mineral söhngeite which is reported to contain octahedrally coordinated gallium atoms Crystal Structure of a new mineral söhngeite, J.D. Scott, The American Mineralogist, (1971), 56, 355 Gallium hydroxide is

amphoteric In chemistry, an amphoteric compound () is a molecule or ion that can react both as an acid and as a base. What exactly this can mean depends on which definitions of acids and bases are being used. One type of amphoteric species are amphiproti ...

. In strongly acidic conditions, the gallium

ion An ion () is an atom or molecule with a net electrical charge. The charge of an electron is considered to be negative by convention and this charge is equal and opposite to the charge of a proton, which is considered to be positive by conven ...

, Ga³⁺ is formed. In strongly basic conditions, Ga(OH)₄⁻ is formed. Salts of Ga(OH)₄⁻ are sometimes called gallates.

References

Hydroxides Gallium compounds {{inorganic-compound-stub