Two kinds of indium-tin oxide (ITO) precursors, cubic indium hydroxide (In( OH)3 ) and orthorhombic indium oxide hydroxide (InOOH), were prepared by a co-precipitation method. With the help of X-ray diffraction (XRD), thermogravimetric analysis (TGA) and differential thermal analysis (DTA), the phase evolution from cubic In(OH) 3 and orthorhombic InOOH to cubic ITO solid solution and rhombohedral ITO solid solution respectively by heattreatment had been systematically investigated. The transformation from cubic In(OH) 3 to cub...