(a) Consider the geologically common phenomenon, fractionation, whereby after ma
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Question
(a) Consider the geologically common phenomenon, fractionation, whereby after material Q cools to some tempeature, all the crystals are removed from the system; the remaining liquid continues to cool and percipitate crystals. Is there any way via fractionation that liquid from system Q could become more enriched in component A than the composition of the eutectic? If so describe it. If not, explain why not.
(b) Consider all possible compositions along the A-AB4 portion of this binary system. During the heating from 700C of any A-AB4 composition in the binary system, what is the composition of the first melt that possibly could form?
(c) From your answers in parts (a) and (b) above, explain the significance of a eutetic point.
Explanation / Answer
(a)
If A and B is mixed with different proportions, there is a possibility, neigther A is rich compared to B or B is rich compared to A, so it may exibit eutectic nature
(b)
First A start to melt
(c) Significants of eutectic point
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