Chemistry Exam > Chemistry Questions > The spinels CoFe2O4 and FeFe2O4, respectively...
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The spinels CoFe2O4 and FeFe2O4, respectively are:
- a)Inverse and normal
- b)Inverse and inverse
- c)Normal and normal
- d)Normal and inverse
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
The spinels CoFe2O4 and FeFe2O4, respectively are:a)Inverse and normal...
- Spinels have a general formula AB2O4 and are classified as either normal or inverse.
- In a normal spinel, A2+ ions occupy the tetrahedral sites, and B3+ ions are in octahedral sites.
- In an inverse spinel, half of the B3+ ions and all A2+ ions occupy octahedral sites, while the remaining B3+ ions occupy tetrahedral sites.
- CoFe2O4 is inverse because Co2+ prefers octahedral sites.
- FeFe2O4 (magnetite) is also inverse with Fe3+ ions distributed as described.
Most Upvoted Answer
The spinels CoFe2O4 and FeFe2O4, respectively are:a)Inverse and normal...
Explanation:
Spinels are a class of minerals with the general formula AB2O4, where A and B are metal ions. There are two types of spinels, namely normal spinels and inverse spinels, which are differentiated based on the distribution of metal ions in the crystal structure.
- Normal spinels: In normal spinels, the A ions occupy the tetrahedral sites, while the B ions occupy the octahedral sites. This results in a net magnetic moment of zero.
- Inverse spinels: In inverse spinels, the A ions occupy the octahedral sites, while the B ions occupy both the tetrahedral and octahedral sites. This results in a net magnetic moment that is not zero.
CoFe2O4 and FeFe2O4 are both spinels, and their magnetic properties can be determined by analyzing their crystal structure.
CoFe2O4:
- Co2+ ions occupy the tetrahedral sites
- Fe3+ ions occupy the octahedral sites
- The net magnetic moment is zero since the distribution of metal ions is normal
FeFe2O4:
- Fe2+ and Fe3+ ions occupy the tetrahedral and octahedral sites, respectively
- The net magnetic moment is not zero since the distribution of metal ions is inverse
Therefore, the correct answer is option 'A': CoFe2O4 is an inverse spinel, while FeFe2O4 is a normal spinel.
Spinels are a class of minerals with the general formula AB2O4, where A and B are metal ions. There are two types of spinels, namely normal spinels and inverse spinels, which are differentiated based on the distribution of metal ions in the crystal structure.
- Normal spinels: In normal spinels, the A ions occupy the tetrahedral sites, while the B ions occupy the octahedral sites. This results in a net magnetic moment of zero.
- Inverse spinels: In inverse spinels, the A ions occupy the octahedral sites, while the B ions occupy both the tetrahedral and octahedral sites. This results in a net magnetic moment that is not zero.
CoFe2O4 and FeFe2O4 are both spinels, and their magnetic properties can be determined by analyzing their crystal structure.
CoFe2O4:
- Co2+ ions occupy the tetrahedral sites
- Fe3+ ions occupy the octahedral sites
- The net magnetic moment is zero since the distribution of metal ions is normal
FeFe2O4:
- Fe2+ and Fe3+ ions occupy the tetrahedral and octahedral sites, respectively
- The net magnetic moment is not zero since the distribution of metal ions is inverse
Therefore, the correct answer is option 'A': CoFe2O4 is an inverse spinel, while FeFe2O4 is a normal spinel.
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The spinels CoFe2O4 and FeFe2O4, respectively are:a)Inverse and normal...
Transition metals with d1-d4, d6-d9 configurations in the position of A2+ of the spinel AND transition metal with d0, d5, d10 in the position of B3+ of the spinel are inverse. Here in both cases this is valid.so both are inverse.
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The spinels CoFe2O4 and FeFe2O4, respectively are:a)Inverse and normalb)Inverse and inversec)Normal and normald)Normal and inverseCorrect answer is option 'A'. Can you explain this answer? for Chemistry 2025 is part of Chemistry preparation. The Question and answers have been prepared according to the Chemistry exam syllabus. Information about The spinels CoFe2O4 and FeFe2O4, respectively are:a)Inverse and normalb)Inverse and inversec)Normal and normald)Normal and inverseCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Chemistry 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The spinels CoFe2O4 and FeFe2O4, respectively are:a)Inverse and normalb)Inverse and inversec)Normal and normald)Normal and inverseCorrect answer is option 'A'. Can you explain this answer?.
The spinels CoFe2O4 and FeFe2O4, respectively are:a)Inverse and normalb)Inverse and inversec)Normal and normald)Normal and inverseCorrect answer is option 'A'. Can you explain this answer? for Chemistry 2025 is part of Chemistry preparation. The Question and answers have been prepared according to the Chemistry exam syllabus. Information about The spinels CoFe2O4 and FeFe2O4, respectively are:a)Inverse and normalb)Inverse and inversec)Normal and normald)Normal and inverseCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Chemistry 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The spinels CoFe2O4 and FeFe2O4, respectively are:a)Inverse and normalb)Inverse and inversec)Normal and normald)Normal and inverseCorrect answer is option 'A'. Can you explain this answer?.
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