Fig. 5

SEM images and elements detected in the EDX analysis are as follows: (1) It has been determined that the sample contains a higher amount of calcium and silicon compared to other detected elements, and a lesser amount of magnesium, aluminum, iron, sodium, and sulfur. (2) The sample contains a significant amount of calcium, and a lesser amount of silicon, magnesium, aluminum, iron, sodium, potassium, and chlorine. (3) It has been found that the sample contains a higher amount of calcium and silicon compared to other detected elements, and a lesser amount of magnesium, aluminum, iron, potassium, and chlorine. (4) The sample contains a higher amount of calcium and magnesium compared to other detected elements, and a lesser amount of silicon, chlorine, potassium, sodium, aluminum, iron, and sulfur. (5) It has been determined that the sample contains a high amount of calcium, and a lesser amount of silicon, magnesium, aluminum, potassium, and chlorine. (6) The sample contains a high amount of calcium, and a lesser amount of magnesium, silicon, aluminum, sulfur, and chlorine. (7) It has been found that the sample contains a high amount of calcium, and a lesser amount of silicon, magnesium, chlorine, aluminum, sodium, potassium, iron, and sulfur. (8) The sample contains a high amount of calcium, and a lesser amount of magnesium, silicon, aluminum, and iron