Recovered iron hydroxides from Electro-coagulated (EC) sludge collected from the textile wastewater treatment plant and heat treated forms of iron oxides on phase composition properties and phase identification were reported. EC sludges containing iron hydroxides were examined with heat treatment at a temperature of 100, 300, 500 and 800 ⁰C.  The raw and analyzed data of the x-ray diffraction examinations of the raw iron hydroxides containing EC sludge and transformed iron oxides were reported. X- ray Diffraction (XRD) analytical techniques were used for both raw EC sludge and transformed iron oxides, hematite,  characteristic determination. Iron oxide (Hematite)  diffraction pattern as comparative to International Central Diffraction Data (ICDD) from heat treated at high temperature EC sludge were evaluated and confirmed.  Raw and analyzed data of XRD analysis for both recovered iron hydroxides and transformed iron oxides is uploded in the  data repository as PDF and XPS viewer.

X-ray Diffraction (XRD) analysis were acquired both for raw sludge and heat treated with a temperature range of 100-800 ⁰C using X-ray difractometer (SHIMADZU, MAXima_X XRD-7000). Basic data processing together with their longest peak intensity and Powder diffraction file were recorded directly from XRD machine.

Thermal treatment temperature is critical in the oxidative transformation of iron hydroxides/Fe₃O₄ to hematite iron oxides to confirm by characterizations of its phase composition

• Thus, four heat treatment: Effect of temperatures (100, 300, 500 and 800 ⁰C) to transform iron hydroxides to hematite iron oxides for their diffraction pattern were studied.
• Strategic analytical technique of XRD was used to study the effect of thermal treatment and raw EC sludge for their phase composition.

Mechanically and thermally treated samples were subjected for XRD analysis. Powder diffraction file (PDF) data for all samples were generated from the analytical instruments, XRD machine together with the international centre for diffraction data (ICDD) reference minerals. Also, basic processing (BP) of the  most intense peaks information in terms of angular position (2Theta), Interplanar spacing (d), Intensity (I) and Peak Width (FWHM) are saved as XPS viewer.