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The recrystallization temperature for cop- per usually ranges from 200°C to 400°C.
Highly purified copper will recrystallize at 100°C if annealed for a long time.
the magma or lava heats the rock it is in contact with, causing recrystallization
The crystallization/recrystallization of sodium chloride from water solutions is frequently used.
For purification
Grain size would generally increase during recrystallization with time spent at optimal crystallization temperature.