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If the unit cell of a mineral has cubic ...

If the unit cell of a mineral has cubic close packed (ccp) array of oxygen atoms with m fraction of octahedral holes occupied by aluminium ions and n fraction of tetrahedral holes occupied by magnesiums ions, m and n respectively, are

A

`(1)/(2), (1)/(8)`

B

`1, (1)/(4)`

C

`(1)/(2), (1)/(4)`

D

`(1)/(4), (1)/(8)`

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The correct Answer is:
A
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Knowledge Check

  • If the unit cell of a minearl has a cubic close packed (ccp) array of oxygen atoms with m fraction of octahderal holes occupied by aluminium ions and n fraction of tetrahdral holes occupied by magnesium ions, m and n, respectively are

    A
    `1/2 , 1/8`
    B
    `1,1/4`
    C
    `1/2, 1/2`
    D
    `1/4,1/8`

  • If the unit cell of a mineral has cubic packed (c.c.p.) array of oxygen atoms with m fraction of octahedral holes occupied by aluminium ions and n fraction of tetrahedral holes occupied by magnesium ions, m and n respectively are

    A
    `1/2, 1/8`
    B
    `1,1/4`
    C
    `1/2,1/2`
    D
    `1/4, 1/8`

  • If the unit cell of a mineral has a cubic close packed (ccp) array of oxygen atoms with m fraction of octahedral holes occupied by magnesium ions , m and n, respectively are

    A
    `1/2,1/8`
    B
    `1,1/4`
    C
    `1/2,1/2`
    D
    `1/4,1/8`
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