Table 2.
Crystallite size (calculated using Scherrer formula) and crystalline phases of hydrothermally synthesized iron oxide nanostructures (NVx), determined by X-ray diffraction (XRD), according to the reference patterns in the International Centre for Diffraction Data Powder Diffraction File (ICDD PDF) 4+ 2019 database.
| Sample | Crystallite Size (Scherrer), nm | The Crystalline Phase Identified by XRD; Phase Content * | Formula | PDF References |
|---|---|---|---|---|
| NV4 | 36 | 100% Hematite | Fe2O3 | 01-089-0599 |
| NV5 | 32 | 100% Hematite | Fe2O3 | 01-089-0599 |
| NV6 | 37 22 |
96.7% Hematite 3.3% Goethite |
Fe2O3 FeO(OH) |
01-089-0599 01-081-0464 (I) |
| NV7 | 33 25 |
~66% Hematite ~34% Goethite |
Fe2O3 FeO(OH) |
01-077-9924 (*) 00-029-0713 (I) |
* It should be noted that the percentage of crystalline phases calculated from XRD is a semi-quantitative estimation.