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There are four formula units in fluorite...

There are four formula units in fluorite and antifluorite structure.

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The correct Answer is:
T
Both have `Z_(eff) = 4`.
In flourite-type formula is `A_(4)B_(8) = 4AB_(2)`, but in anitfluorite-type formula is `A_(8)B_(4) = 4A_(2)B`.
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Which of the follwing statements is/are correct for both fluorite and antifluorite structures?

In Na_2 O, having antifluorite structure

In fluorite structure of AB_2

Antifluorite structure is for :

In fluorite structure (CaF_2) -

Zinc Blende Structure || Wurtzite Structure || Fuorite and Antifluorite Structure || Defects In Solids (Schottky & Frenkel Defects)

Statement-1: Na_2O adopts structure similar to that of CaF_2 but positions of positive and negative ions are reversed. Statement-2:The structure of Na_2O is also known as antifluorite structure.

CENGAGE CHEMISTRY-SOLID STATE-Exercises (True/False)
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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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