Quartz polymorphs determined from HT-XRD measurements
| Sample | Temperature: °C | ||||||
|---|---|---|---|---|---|---|---|
| 1000 | 1100 | 1200 | 1300 | 1350 | 1400 | ||
| A1 | α-quartz: wt% | 5.0 | 4.4 | 1.7 | — | — | — |
| β-quartz: wt% | 4.8 | 0.4 | 0.7 | — | — | — | |
| A2 | α-quartz: wt% | 6.2 | 0.9 | 0.6 | — | — | — |
| β-quartz: wt% | 5.3 | 1.0 | — | — | — | — | |
| B1 | α-quartz: wt% | 2.4 | 1.4 | 0.0 | — | — | — |
| β-quartz: wt% | 4.7 | 1.8 | 1.8 | — | — | — | |
| B2 | α-quartz: wt% | 3.6 | 1.4 | 1.0 | — | — | — |
| β-quartz: wt% | 2.5 | 1.3 | 0.9 | — | — | — | |
| C | α-quartz (expanded) : wt% | 1.2 | 0.8 | 0.8 | — | — | — |
| α-quartz-2: wt% | 6.3 | 6.5 | 3.3 | — | — | — | |
| β-quartz: wt% | 1.6 | 1.7 | 4.3 | 1.5 | 1.3 | 1.2 | |
| D | α-quartz (expanded) : wt% | 2.0 | 2.3 | 0.3 | — | — | — |
| α-quartz-2: wt% | 4.4 | — | — | — | — | — | |
| β-quartz: wt% | 5.8 | 1.0 | — | — | — | — | |
| 1000 | 1100 | 1200 | 1300 | 1350 | 1400 | ||
|---|---|---|---|---|---|---|---|
| A1 | α-quartz: wt% | 5.0 | 4.4 | 1.7 | — | — | — |
| β-quartz: wt% | 4.8 | 0.4 | 0.7 | — | — | — | |
| A2 | α-quartz: wt% | 6.2 | 0.9 | 0.6 | — | — | — |
| β-quartz: wt% | 5.3 | 1.0 | — | — | — | — | |
| B1 | α-quartz: wt% | 2.4 | 1.4 | 0.0 | — | — | — |
| β-quartz: wt% | 4.7 | 1.8 | 1.8 | — | — | — | |
| B2 | α-quartz: wt% | 3.6 | 1.4 | 1.0 | — | — | — |
| β-quartz: wt% | 2.5 | 1.3 | 0.9 | — | — | — | |
| C | α-quartz (expanded) : wt% | 1.2 | 0.8 | 0.8 | — | — | — |
| α-quartz-2: wt% | 6.3 | 6.5 | 3.3 | — | — | — | |
| β-quartz: wt% | 1.6 | 1.7 | 4.3 | 1.5 | 1.3 | 1.2 | |
| D | α-quartz (expanded) : wt% | 2.0 | 2.3 | 0.3 | — | — | — |
| α-quartz-2: wt% | 4.4 | — | — | — | — | — | |
| β-quartz: wt% | 5.8 | 1.0 | — | — | — | — | |
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