Mineralogical composition of bone derived materials^a.

Component	Cattle bone ash (wt%)14	Calcined bone powder (wt%)15	Cow bone char powder (wt%)23
CaO	43.26	52.45	49.80
SiO2	<0.01	1.34	0.89
Al2O3	<0.01	0.35	0.44
Fe2O3	<0.01	0.25	—
Na2O	<0.01	1.6	0.96
MgO	0.54	1.3	0.78
K2O	<0.01	0.3	—
MnO	<0.01	<0.03	—
P2O5	44.67	36.85	32.90
SO3	0.08	0.41	—
TiO2	—	<0.01	—
Cl	—	0.4	0.11
C	—	—	1.00
LOI	2.36	1.2	13.13

^aLOI denotes the loss on ignition.