Figures of the Article

• "Dulong Yu" samples
• Microscopic characteristics of sample DLY-1-DLY-4 under transmitted light(a-d) and sample DLY-2-DLY-3 under reflected light(e, f)
• The characteristics of samples under orthogonal polarized light microscope: Sample DLY-2 (a, b) and DLY-3 (c, d) show microscale fine-medium-grain crystallized structure, with a large amount of grain allocrystalline quartz and a small amount of microscopic scaly sericite
• X-ray powder diffraction pattern of the sample DLY-2
• X-ray powder diffraction pattern of the sample DLY-3
• Typical infrared reflectance spectrum of the "Dulong Yu" sample
• Infrared transmission spectra of the "Dulong Yu" sample DLY-1 and DLY-2
• Raman spectra of the "Dulong Yu" sample DLY-1-DLY-3
• X-ray fluorescence spectra of the samples DLY-1-DLY-3
• UV-Vis spectra of the "Dulong Yu" sample DLY-1-DLY-3