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Table 5.
SXPD refinement results (lattice parameters) for microwave-dried silicates at 995°C, with percentage contribution of each phase to the crystalline component of the fit and overall percentage contribution of these to the measured SXPD pattern (degree of crystallinity).
| Sample | Phase | Space | Lattice parameters (Å) | Contribution | |||
|---|---|---|---|---|---|---|---|
| group | a | b | c | to crystalline | |||
| phases % | |||||||
| MgSiO3 | Forsterite 1amor | Pnmb | 6.04 (3) | 9.16 (3) | 5.89 (4) | – | |
| Forsterite 2 | Pnmb | 5.931 (1) | 10.341 (3) | 6.049 (2) | 24.2 | Total crystalline | |
| Forsterite 3 | Pnmb | 6.127 (3) | 9.827 (3) | 5.837 (1) | 10.7 | Forsterite 34.9 % | |
| Enstatite 1amor | Pbca | 18.80 (2) | 8.793 (9) | 5.277 (7) | – | ||
| Enstatite 2 | Pbca | 18.439 (6) | 8.929 (3) | 5.225 (1) | 40.3 | Total crystalline | |
| Enstatite 3 | Pcab | 7.995 (2) | 18.020 (9) | 5.008 (2) | 20.0 | Enstatite 60.3 % | |
| Cristobalite | P41212 | 4.983 (1) | 7.13 (2) | – | 4.8 | ||
| Degree of crystallinity | 42.09% | ||||||
| Mg0.9Fe0.1SiO3 | Forsterite 1amor | Pnmb | 6.0 (4) | 9.9 (5) | 6.6 (5) | – | |
| Forsterite 2 | Pnmb | 6.04 (1) | 10.21 (1) | 5.949 (7) | 100 | ||
| Degree of crystallinity | 2.1% | ||||||
| Mg2SiO4 | Forsterite 1amor | pnmb | 6.2 (3) | 10.4 (1) | 4.78 (5) | – | |
| Forsterite 2 | pnmb | 6.05171 (5) | 10.3321 (8) | 4.79498 (4) | 96.2 | ||
| Cristobalite | P41212 | 5.0724 (6) | 7.111 (1) | – | 3.8 | ||
| Degree of crystallinity | 57.4% | ||||||
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