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Table 1 Main ingredients of natural Marble, Qingshi and Hedishi stones, and the corresponding peak locations in XRD patterns

From: Nano-materials enhanced protectants for natural stone surfaces

Stone component Location (2θ)
Marble CaCO3 23.05, 29.40, 35.97, 39.41, 43.16, 47.11, 48.503, 60.67, 65.61, 70.24, 73.73, 77.18, 81.55, 83.77
(Ca0.03Mg0.97)CO3 23.12, 29.50, 36.06, 39.52, 43.27, 47.25, 47.70, 48.13, 49.06
Cu2FeGeS4 29.15, 48.30, 48.65, 57.42
Qingshi SiO2 20.83, 26.59, 36.50, 39.37, 40.23, 42.39, 50.03, 55.17, 59.86, 68.20, 68.32, 73.47, 75.66, 79.88, 80.04, 81.17, 81.49
AlPO4 20.76, 26.43, 36.37, 39.06, 40.71, 59.61, 67.23, 67.36, 67.80, 72.48, 80.92
C 26.55, 44.57, 54.54
Hedishi SiO2 20.86, 26.64, 36.54, 39.46, 40.29, 42.45, 45.788, 50.13, 54.87, 59.95, 65.78, 67.74, 68.14, 68.32, 73.47, 75.66, 77.67, 79.88, 80.04, 81.17, 81.49, 83.84, 84.96
SiS2 20.79, 26.51, 36.50, 39.49, 42.40, 50.08, 54.935, 60.02, 68.32