Changes of Mineralogical Properties and Biological Activities of Gypsum and Its Calcined Products with Different Phase Structures

Table 1

The textural properties of RG, CG150, CG350, and CG750 powder.

Sample	RG	CG150	CG350	CG750
BET surface area (m^2/g)	1.1215	11.0159	12.5437	3.1734
Pore volume (ml/g)	0.0063	0.0409	0.0438	0.0163
Average pore size (nm)	22.4699	14.8513	13.9672	20.5458