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What is the formula of a magnetic oxide ...

What is the formula of a magnetic oxide of cobalt used in recording tapes that crystallises with cobalt atoms occupying one - eight of the tetrabedral holes and one- half of the octahedral holes in a closest packed array of oxide inos ?

A

`Co_(2) O_(3)`

B

`Co O_(2)`

C

`Co_(3) O_(4)`

D

`CoO`

Text Solution

Verified by Experts

The correct Answer is:
b
Tetrahedral holes `= 8` Octabadral holes `= 4`
Cobalt atoms = `(8)/(8) = 1`
Oside ions = `(4)/(2) = 2`
Thus, formula is `CaO_(2)`.
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