Assertion: mineral's reaction | /r/HasProperty | favored at high temperature
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Source sentences:
text: Their instability in the condensed phase is due to their ready disproportionation to aluminium and the respective trihalide: the reverse reaction is favored at high temperature (although even then they are still short-lived), explaining why AlF 3 is more volatile when heated in the presence of aluminium metal, as is aluminium metal when heated in the presence of AlCl 3 .