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\nAnion Vacancies and F Centres in Metal Excess Defects\n

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\nThe formation of F-centers in a crystal is caused by the presence of anion vacancies, which are caused by the presence of metal excess defects. Alkali metal halides, such as sodium chloride and potassium chloride, are examples of...\nThe formation of F-centers in a crystal is caused by the presence of anion vacancies, which are caused by the presence of metal excess defects. Alkali metal halides, such as sodium chloride and potassium chloride, are examples of crystals that exhibit this defect. These crystals contain an excessive amount of metal ions as a result of anionic vacancies. Unpaired electrons occupy anionic sites, which leads to the formation of F-centers. This occurs when negative ions are absent from the crystal lattice and are being replaced by electrons. It is the presence of F-centers that causes the crystals to take on a particular colour, such as the yellow colour that is seen in NaCl crystals.

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Media Length
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2:26
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Grade
9th - Higher Ed
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Subjects
Science
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Media Type
Instructional Videos
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Source:
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\nAudio Visual Representation of Chemistry\n\n
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Date
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2024
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Language
English
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For Teacher Use
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Fine Print: Educational Use
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Concepts

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cations, anions, center, color
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Additional Tags

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f-centers formation, crystal, anion vacancies, metal excess defects, alkali metal halides, sodium chloride, potassium chloride, excessive metal ions, anionic vacancies, unpaired electrons, anionic sites, electron replacement, coloration, yellow color, nacl crystals, stoichiometric defect, caused due, lattice side, unpaid electron, ionic crystal, anion vacancy, anion, vacancy, defect, minus, occupied, number, presence, hole
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\n\" data-title=\"Get Full Access\" data-container=\"body\" rel=\"popover\" tabindex=\"0\" aria-label=\"Play video: Anion Vacancies and F Centres in Metal Excess Defects\" href=\"/subscription/new\">\"Anion\n\n
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