Sage-Tips

How many tetrahedral voids are occupied in diamond?

Diamond has ZnS type structure. The total number of tetrahedral voids in fcc unit cell = 8, where the carbon atoms occupy 50\% . i.e. 4 of them.

In which alternate tetrahedral voids are occupied?

In ZnS structure, sulphide ions occupy all FCC lattice points while Zn2+ ions are present in alternate tetrahedral voids.

How many alternate tetrahedral voids are there in FCC?

In ZnS, S2– (sulphide ions) are present at fcc position giving four sulphide ions per unit cell. To comply with 1 : 1 stoichiometry, four Zn2+ ions must be present in four alternate tetrahedral voids out of eight tetrahedral voids present.

How many tetrahedral voids are in CCP unit cell?

8
Number of tetrahedral voids = 8.

How many tetrahedral holes occupied in ZnS?

Zincblende/sphalerite is based on a fcc lattice of anions whereas wurtzite is derived from an hcp array of anions. In both structures, the cations occupy one of the two types of tetrahedral holes present.

How many tetrahedral holes are occupied?

There are 8 tetrahedral holes and 4 octahedral holes in a fcc unit cell. while the quite small sodium ions occupy all the tetrahedral holes.

Which set of characters of ZnS Crystal is correct?

ZnS has ccp structure (fee) in which S2− ions occupy comers and face-centres and Zn2+ ions are present in alternate tetrahedral voids. Further, each Zn2+ ion is surrounded tetrahedrally by 4S2− ions and vice-versa.

How many tetrahedral holes are there in the FCC?

8 tetrahedral holes
There are 8 tetrahedral holes and 4 octahedral holes in a fcc unit cell.

How many octahedral sites per sphere are there in a cubic close packed structure?

one octahedral site
Each sphere in a close-packed lattice is associated with one octahedral site, whereas there are only half as many tetrahedral sites.

Which of the following fcc structure contains cations in alternate tetrahedral voids NaCl B ZnS C na2o D CaF2?

Correct option B ZnS Explanation:In ZnS S2– sulphide ions are present at fcc position giving four sulphide ions per unit cell.

How many tetrahedral voids are there?

The empty space at the centre of four atoms which are in tetrahedral arrangement is called tetrahedral void. There are two tetrahedral voids for each sphere (atom).

How many tetrahedral voids are occupied in a diamond?

One half or 50\% tetrahedral voids are occupied in diamond. Its unit cell is similar to face centered cubic unit cell. Was this answer helpful?

What is the conventional unit cell of diamond?

Conventional Unit Cell. Conventional unit cell of the diamond structure: The underlying structure is fcc with a two-atomic basis. One of the two atoms is sitting on the lattice point and the other one is shifted by 1 4 along each axes. This forms a tetrahedrical structure where each atom is surrounded by four equal-distanced neighbours.

What is the tetrahedral diamond cubic crystal structure?

The tetrahedral diamond cubic crystal structure is a repeating pattern of 8 atoms. A diamond is a clear transparent stone made totally of Carbon atoms crystallised in a cubic (isometric) arrangement which has been highly compressed over millions of years under high pressure & temperature.

How do you find the cncn of a tetrahedral void?

CN of a tetrahedral void is four. The number of tetrahedral voids per sphere (anion)= (no. of tetrahedral voids around a sphere (anion))/ (no. of spheres around a void. Thus in a closest packed arrangement, the number of tetrahedral voids is double the no. of spheres (anion).

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