Table 1.

Crystallographic parameters of samples.

Sample	Phase	Grid Parameters, nm			β	Volume, nm3	D, nm
		a	b	c		V
Sample 1	CaSO4·2H2O	5.67	15.11	6.49	118.5	489	535
	CaSO4·0.5H2O	12.02	6.93	12.67	90.2	1055	285
Sample 2	CaSO4	6.23	6.98	6.97	–	303	47
Sample 3	CaSO4	6.99	7.00	6.24	–	305	49
	CaS	5.69	–	–	–	184	43