From: Chemical characterization of some substituted hydroxyapatites
Sample symbol
Calculated XSi
Measured XSi
Calculated Ca/P
Measured Ca/P
HAs
---
1.67
1.68
Si-HA
0.5128
0.314
1.71
1.83
Si-CHA
0.0609
0.03214
1.88
1.42