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Table 1
Experimental conditions and mineralogy of annealed samples.
Temperature (K) | Heating Rate (K/hour) | Run Duration at T (hours) | Mineralogy (relative fractions of the crystalline phases in %) | ||||
Forsterite | Clinoenstatite | Orthoenstatite | Protoenstatite | Cristobalite | |||
|
|||||||
973 | 300 | 360 | 100 | – | – | – | – |
993 | 300 | 240 | 100 | – | – | – | – |
1013 | 300 | 240 | 27 | 14 | 59 | – | – |
1033 | 300 | 288 | 22 | 18.5 | 57.5 | – | – |
1176 | 12 000 | 15 | 19 | 18 | 63 | – | – |
1273 | 7 | 0 | 25 | 27 | 48 | – | – |
1273 | 333 | 20 | 25 | 17 | 58 | – | – |
1273 | 12 000 | 2 | 18 | 19 | 63 | – | – |
1378 | 12 000 | 15 | 18 | – | – | 79 | 2 |
Notes. Relative fractions of minerals are determined from XRD patterns. An error of ± 5% is typically considered for the method employed (see text).
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