| ACP | Amorphous Calcium Phosphate |
| FTIR | Fourier-transformed Infrared spectroscopy |
| nAP | nanosized hydroxy-apatite |
| NUE | Nutrient usage efficiency |
| PXRD | Powder X-ray Diffraction |
| TEM | Transmission Electron Microscopy |
| TSP | Triple superphosphate |
| SAXS | Small-angle X-ray Scattering |
| WAXTS | Wide-angle X-Ray Scattering |
| XPS | X-ray Photoelectron Spectroscopy |
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