Fig. 3

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Backscattered electron image of (a) MP 4 and (b) MP 5 after annealing at 1000°C: 1 cuspidine, 2 wollastonite, 3 quartz, 4 hematite, 5 fluorite, 6 diopside, 7 Ca2SiO4, 8 calcite, 9 magnesite, 10 calcium magnesium fluoride, 11 magnesium fluoride, 12 liquid phase.

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