How Do F-Centres Influence Crystal Density?

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F-centres are point defects in crystals where an anion vacancy is occupied by an electron, influencing the overall density of the crystal. The formation of f-centres typically decreases the density because the absence of anions creates vacancies that reduce the mass per unit volume. This relationship is crucial in understanding how defects affect material properties. The impact of f-centres on crystal density is directly linked to their role in altering the crystal lattice structure. Understanding f-centres is essential for applications in materials science and solid-state physics.
beesher
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Hi folks, I've recently been studying point defects, but I can't seem to come across how the formation of f-centres actually affects the density of a crystal.

Does it increase or decrease the density?

Thanks for any help/ ponters
 
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It follows directly from the definition. What is an F-center?
 

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