what are the f-centers and its consequences??
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An , FARBE center or color center (from the original GermanFarbzentrum; Farbe means color, andzentrum center) is a type ofcrystallographic defect in which ananionic vacancy in a crystal is filled by one or more unpaired electrons. Electrons in such a vacancy tend to absorb light in the visible spectrum such that a material that is usuallytransparent becomes colored. This is used to identify many compounds, especially zinc oxide (yellow).
Color centers can occur naturally in compounds (particularly metallic oxides) because when heated to high temperature the ions become excited and are displaced from their normal crystallographic positions, leaving behind some electrons in the vacated spaces.
hope it helps u
An , FARBE center or color center (from the original GermanFarbzentrum; Farbe means color, andzentrum center) is a type ofcrystallographic defect in which ananionic vacancy in a crystal is filled by one or more unpaired electrons. Electrons in such a vacancy tend to absorb light in the visible spectrum such that a material that is usuallytransparent becomes colored. This is used to identify many compounds, especially zinc oxide (yellow).
Color centers can occur naturally in compounds (particularly metallic oxides) because when heated to high temperature the ions become excited and are displaced from their normal crystallographic positions, leaving behind some electrons in the vacated spaces.
hope it helps u
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