GATE XE · 2020 · XE-C
Question 18: Properties and Applications of Materials
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Question 18
XE-CNAT2 marksNeeds review
Fe₃O₄ (also represented as FeO·Fe₂O₃) is a FCC structured inverse spinel (AB₂O₄) material where 1/8 of tetrahedral sites are occupied by half of B cations and 1/2 of the octahedral sites are occupied by remaining B and A cations. The magnetic moments of cations on octahedral sites are antiparallel with respect to those on tetrahedral sites. Atomic number of Fe is 26 and that of O is 8. The saturation magnetic moment of Fe₃O₄ per formula unit in terms of Bohr magnets (μB) will be ______ μB. Ignore contribution from orbital magnetic moments.
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2020XE-C
GATE XE 2020 · Paper 1
Engineering Sciences · Original paper archive
- Section
- Section XE-C
- Question type
- Numerical answer (NAT)
- Marks
- 2 marks
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