Answer:
Explanation:crystal size in igneous rocks is determined by how quickly magma or lava cooled to form it.
The rate of cooling of the melt ,slow cooling allows large crystals to form, fast cooling yields small crystals.
In industrial processes, the crystal size distribution is determined typically by sieving and measuring the weight of the crystals retained on the screens.
Typical crystal sizes are directly proportional to growth rate and inversely proportional to nucleation rate.
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