The physical characteristics of a crystal can be changed by F-centers due to the presence of trapped electrons. The trapped electrons can affect the thermal conductivity of the crystal, making it less efficient at transferring heat. The electrical conductivity of a crystal can also be affected by F-centers due to the presence of the trapped electrons. This can make the crystal less able to conduct electricity, which can have a negative effect on the overall performance of the crystal. Additionally, the trapped electrons can make the crystal more brittle, leading to a decrease in its structural integrity and making it more prone to breakage.
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