Home
Class 11
CHEMISTRY
Try to answer the following: (i) In Zi...

Try to answer the following:
(i) In Zinc Blende structure there is one `Zn^(+2)` ion per `S^(2-)` ion. But the radius ratio lies in the range of Tetrahedral void and there are two tetrahedral voids available per `S^(2-)`. Can you given the idea about the arrangement of the lattice.
(ii) What is the striking difference between the Fluorite and the Anit-fluorite structures

Text Solution

Verified by Experts

The correct Answer is:
(i) `Zn^(2-)` ions occupy alternate Tetrahedral holes; (ii) Anit Flourite: Anions in FCC and Cations in Tetrahedral holes. Fluorite: Cations in FCC and Anions in Tetrahedral holes
Promotional Banner

Topper's Solved these Questions

  • SOLID STATE

    RESONANCE ENGLISH|Exercise Part-II : Only one option correct type|42 Videos

  • SOLID STATE

    RESONANCE ENGLISH|Exercise Exercise -2 (Part-I)|19 Videos

  • SOLID STATE

    RESONANCE ENGLISH|Exercise Miscellaneous solved problems|16 Videos

  • S BLOCK ELEMENTS

    RESONANCE ENGLISH|Exercise ORGANIC CHEMISTRY(Biomolecules & Polymer)|4 Videos

  • STRUCTURAL IDENTIFICATION & PRACTICAL ORGANIC CHEMISTRY

    RESONANCE ENGLISH|Exercise Section -B|18 Videos

Similar Questions

Explore conceptually related problems

If the crystallises in zinc blende structure with I^- ions at lattice points. What fraction of tetrahedral voids is occupied by Ag^+ ions ?

In Zinc blende structure, Zn^(+2) ions are present in alternate tetrahedral voids and S^(-2) in ccp. The coordination number of Zn^(+2) and S^(-2) are respectively

MgAl_(2)O_(4) , is found in the Spinal structure in which O^(2-) ions consititute CCP lattice, Mg^(2+) ions occupy 1/8th of the Tetrahedral voids and Al^(3+) ions occupy 1.2 of the Octahedral voids. Find the total +ve charge contained in one unit cell

In a cubic closed packed structure of mixed oxides the lattice is made up of oxide ions, one eighth of tetrahedral voids are occupied by divalent ions (A^(2+)) while one half of the octahedral voids occupied trivalent ions (B^(3+)) . What is the formula of the oxide ?

In a cubic packed structure of mixed oxides the lattice is made up of oxide ions. One fifth of tetrahedral voids are occupied by divalent (X^(2+)) ions, while one - half of the octahedral voids are occupied by trivalent ions (Y^(3+)) then the formula of the oxide is:

In a cubic close packed structure of mixed oxides, the lattice is made up of oxide ions, one eight of tetrahedral voids are occupied by divalent (X^(2+)) ions, while one - half of the octahedral voids are occupied by trivalent ions (Y^(3+)) , then the formula of the oxide is

In HCP or CCP constituent particles occupy 74% of the available space. The remaining space (26%) in between the spheres remains unoccupied and is called interstitial voids or holes. Considering the close packing arrangement, each sphere in the second layer rests on the hollow space of the first layer, touching each other. The void created is called tetrahedral void. If R is the radius of the spheres in the close packed arrangement then, R (radius of tetrahedral void) = 0.225 R In a close packing arrangement, the interstitial void formed by the combination of two triangular voids of the first and second layer is called octahedral coid. Thus, double triangular void is surrounded by six spheres. The centre of these spheres on joining, forms octahedron. If R is the radius of the sphere. in a close packed arrangement then, R (radius of octahedral void = 0.414 R). In the spinel structure, oxide ions are cubic close packed whereas 1/8th of tetrahedral voids are occupied by A^(2+) cations and 1/2 of octahedral voids are occupied by B^(3+) cations. The general formula of the compound having spinel structure is

In the zinc blende structure, zinc ions occupy alternate tetrahedral voids and S^(2-) ions exist as ccp the radii of Zn^(2+) and S^(2-) ions are 0.83Å and 1.74 Å respectively.The edge length of the ZnS unit cell is :

Statement-1 : The ratio of Zn^2+ and F^(-) per unit cell of ZnS and CaF_2 is 1 :2 Statement-2 : In ZnS, Zn^2+ ions occupy alternate tetrahedral voids and in CaF_2, F^(-) ions occupy all the tetrahedral voids of FCC unit cell.

In a cubic close packed structure (ccp) of mixed oxides, it is found that lattice has O^(2-) ions and one half of the octahedral voids are occupied by trivalent cations (A^(3+)) and one-eighth of the tetrahedral voids are occupied by divalent cations (B^(2+)) . Derive the formula of the mixed oxide.

RESONANCE ENGLISH-SOLID STATE-Exercise -1
  1. Classify each of the following solids as ionic, metallic, molecular, n...

    Text Solution

    |

  2. What are the crystallographic parameter of hexagonal, monoclinic and t...

    Text Solution

    |

  3. The intermetallic compound LiAg crystallizes in cubic lattice in which...

    Text Solution

    |

  4. The body centered cubic cell of chronium has an edge lenth of 0.288nm....

    Text Solution

    |

  5. In which type of 3D arrangement have 1^(st) and IV layer's of sphere a...

    Text Solution

    |

  6. Metallic magensium has a hexagoanl close-packed structure and a densit...

    Text Solution

    |

  7. Aluminium metal (atomic weight = 27 g) crystallises in the cubic syste...

    Text Solution

    |

  8. Tom' cat arranges the glass balls, in a particular 3D array, that two ...

    Text Solution

    |

  9. A student wants to arrange 4 identical spheres (of radiusR) on a two d...

    Text Solution

    |

  10. Illustrate an octahedral void in the close packing of spheres. Why is ...

    Text Solution

    |

  11. The number of tetrahedral and octahedral voids in a hexagonal close pa...

    Text Solution

    |

  12. What is the number and closest distance between two octahedral voids a...

    Text Solution

    |

  13. Suggest the probable structures of the unit cells of the following eac...

    Text Solution

    |

  14. Why does ZnS not crystallize in the NaCl structure ?

    Text Solution

    |

  15. Try to answer the following: (i) In Zinc Blende structure there is o...

    Text Solution

    |

  16. KBr crystallizes in NaCl type of unit cell. K^(+) radius = 1.33Å, Br^(...

    Text Solution

    |

  17. What do you understand by imperfections in ionic crystals? Name the ty...

    Text Solution

    |

  18. How would you explain that (i) non-stoichimetric NaCl is yellow, (ii) ...

    Text Solution

    |

  19. Account for the Silicon is an insulator but silicon doped with phospho...

    Text Solution

    |

  20. How does the conductivity of a semiconductor change if its temperature...

    Text Solution

    |