From: Fabrication of naturel pumice/hydroxyapatite composite for biomedical engineering
SiO2 (%)
Al2O3 (%)
Fe2O3 (%)
MgO (%)
CaO (%)
Na2O (%)
K2O (%)
TiO2 (%)
SO3 (%)
Other (%)
68
16.86
2.72
0.65
1.2
3.58
5.71
0.34
0.12
0.86