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प्रश्न
How will you distinguish between the following pair of terms?
Tetrahedral and octahedral voids
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उत्तर
| Tetrahedral void | Octahedral void | |
| 1. | The tetrahedral void is the name given to the vacant space formed by the touching of four spheres, as shown in the figure. |
Octahedral voids are formed by the combination of voids of two triangular layers of atoms when one triangular layer is placed above another, as shown in the figure. |
| 2. | A tetrahedral void is surrounded by 4 atoms arranged at the corners of a tetrahedron. | An octahedral void is surrounded by 4 atoms arranged at the corners of an octahedron. |
| 3. | Found in close-packed structures like fcc and hcp. | Only present in close-packed structures. |
| 4. | Smaller in size compared to octahedral voids. | Larger in size than tetrahedral voids. |
| 5. | Number of tetrahedral voids = 2 × number of atoms in the lattice | Number of octahedral voids = equal to number of atoms in the lattice |
संबंधित प्रश्न
What is the formula of a compound in which the element Y forms hcp lattice and atoms of X occupy 2/3rd of tetrahedral voids?
The unit cell of a substance has cations A+ at the corners of the unit cell and the anions B− at the center. The simplest formula of the substance is ____________.
Total number of voids in 0.5 mole of a compound which forms hexagonal close packed structure is ____________.
If AgI crystallises in zinc blende structure with I– ions at lattice points. What fraction of tetrahedral voids is occupied by Ag+ ions?
Which set of following characteristics for ZnS crystal is correct?
In which of the following crystals alternate tetrahedral voids are occupied?
If Germanium crystallises in the same way as diamond, then which of the following statement is not correct?
In the cubic close packing, the unit cell has ______.
The number of tetrahedral voids per unit cell in NaCl crystal is:
(i) 4
(ii) 8
(iii) twice the number of octahedral voids.
(iv) four times the number of octahedral voids.
A solid compound XY has Nacl structure. If the radium of cation (X+) is 100 pm, the radium of anion (r–) will be:-
