Spectrum Near-infrared reflectance spectra of Struvite powder at 270K (down) with 32-80 µm grain sizes Spectrum Near-infrared reflectance spectra of Struvite powder at 70K (down) with 32-80 µm grain sizes Spectrum Near-infrared reflectance spectra of Struvite powder at 80K (up) with 32-80 µm grain sizes Spectrum Near-infrared reflectance spectra of Struvite powder at 90K (up) with 32-80 µm grain sizes Spectrum Near-infrared reflectance spectra of Struvite powder at 100K (up) with 32-80 µm grain sizes Spectrum Near-infrared reflectance spectra of Struvite powder at 110K (up) with 32-80 µm grain sizes Spectrum Near-infrared reflectance spectra of Struvite powder at 120K (up) with 32-80 µm grain sizes Spectrum Near-infrared reflectance spectra of Struvite powder at 130K (up) with 32-80 µm grain sizes Spectrum Near-infrared reflectance spectra of Struvite powder at 140K (up) with 32-80 µm grain sizes Spectrum Near-infrared reflectance spectra of Struvite powder at 150K (up) with 32-80 µm grain sizes Spectrum Near-infrared reflectance spectra of Struvite powder at 160K (up) with 32-80 µm grain sizes Spectrum Near-infrared reflectance spectra of Struvite powder at 170K (up) with 32-80 µm grain sizes Spectrum Near-infrared reflectance spectra of Struvite powder at 180K (up) with 32-80 µm grain sizes Spectrum Near-infrared reflectance spectra of Struvite powder at 190K (up) with 32-80 µm grain sizes Spectrum Near-infrared reflectance spectra of Struvite powder at 200K (up) with 32-80 µm grain sizes Spectrum Near-infrared reflectance spectra of Struvite powder at 210K (up) with 32-80 µm grain sizes Spectrum Near-infrared reflectance spectra of Struvite powder at 220K (up) with 32-80 µm grain sizes Spectrum Near-infrared reflectance spectra of Struvite powder at 230K (up) with 32-80 µm grain sizes Spectrum Near-infrared reflectance spectra of Struvite powder at 245K (up) with 32-80 µm grain sizes Spectrum Near-infrared reflectance spectra of Struvite powder at 270K (up) with 32-80 µm grain sizes Spectrum Near-infrared reflectance spectra of Struvite powder at 290K (up) with 32-80 µm grain sizes