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If the radius of the spheres in the clos...

If the radius of the spheres in the close packing is `R` and the radius pf pctahedral voids is `r`, then `r = 0.414R`.

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The correct Answer is:
T
For `OV = r_(o+)//r_(ɵ) = 0.414 - 0.732`
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CENGAGE CHEMISTRY-SOLID STATE-Exercises (True/False)
  1. It is much more difficult to describe the crystal structure of compoun...

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  2. If the radius of the spheres in the close packing is R and the radius ...

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  3. In crystals, the state of complete order and of lowest energy is forme...

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  4. STATEMENT -1 : Amorphous solids are isotrophic STATEMENT -2 : A...

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  5. In bcc lattice, the atoms at the corners of the unit cell are in conta...

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  6. The cubic close-packed structure is based on an fcc unit cell.

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  7. In ZnS (zinc blende) strucutre, the CN of each ion ie 4.

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  8. Solids with Schottky defects are electrical insulators.

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  9. Platinum crystallizes in fcc crystal with a unit cell length a. The at...

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  10. There are four formula units in fluorite and antifluorite structure.

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  11. In antifluorite structure, 50% of TVs are occupied by anion.

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  12. In fluorite structure, 100% of TVs are occupied by cations.

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  13. In diamond, CN of carbon is 4 and its unit cell has 8 carbon atoms.

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  14. ZnS exists in two different form: zinc blende and wurtzite. Both occur...

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  15. Fe^(III) (Fe^(II) Fe^(III))O(4) represent an inverse 2 : 3 spinel stru...

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  16. The addition of CaCl(2) to a KCl crystal lowers the density of the KCl...

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  17. The maximum number of Bravais lattices is shown by tetragonal-type cry...

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  18. Bragg reflection can occur only when gamma le 2d.

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  19. TVs and OVs both are found is hcp and simple cube.

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