Research Article
The Mechanism of the First Hydration-Dehydration Cycle of Pure α- and β-CaSO4•0.5H2O
Table 1
Chemical composition of pure β-HH and SA α-HH before and after the first cycle.
| | Chemical composition (%) | Quartz | Anhydrite II | Hemihydrate | Dihydrate | Syngenite | Calcite |
| | β-HH | 0.3 | 2.1 | 94.3 | 1.8 | 0.2 | 1.3 | | β-HH-1st cycle | 0.5 | 3.4 | 94.6 | 0.0 | 0.2 | 1.3 | | SA α-HH | 0.6 | 0.7 | 97.3 | 0.0 | 0.3 | 1.0 | | SA α-HH 1st cycle | 1.0 | 1.1 | 96.1 | 0.1 | 0.3 | 1.3 |
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