Fig. 2

Temperature dependence of GaN solubility in supercritical ammonia with different mineralizers (100 MPa, 3.1 ± 0.1% mineralizer): NH₄Cl, circle (from previous work [18]); NH₄Br, square (from previous work [12]); NH₄I, triangle (from previous work [12]); NH₄Cl + NH₄Br (equal mole ratio), rhombus (present study); NH₄Cl + NH₄I (equal mole ratio), nabla (present study): a NH₄Cl, NH₄Br, NH₄Cl + NH₄Br; b NH₄Cl, NH₄I, NH₄Cl + NH₄I