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Showing posts with label THE SOLID STATE. Show all posts
Showing posts with label THE SOLID STATE. Show all posts
Thursday, May 6, 2021

How to calculate packing efficiency of cubic unit cell of diamond ?

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Diamond structure is ZnS type structure    in which carbon atoms forms    a   face   centred cubic (FCC/CCP) lattice  as well as    four out...

The edge length of unit cubic cell of diamond is 356.7 pm and this cubic unit cell contains 8 carbon atoms calculate (A) Distance between two carbon atoms, assuming them to spheres in contact (B) Radius of carbon atoms (C) Fraction of the total volume that is occupied by the carbon atoms.

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  (A) Distance between two carbon atoms: (B) Radius of carbon atoms: (C) Fraction (Packing efficiency) of the total volume that is oc...

In diamond, carbon atoms occupy FCC/CCP lattice point as well as alternate tetrahedral voids. If edge length of unit cell is 3.56pm, the radius of carbon atom is ?

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  We know that in diamond structure the distance between two carbon atoms is Related Questions: What are different stacking pattern of atoms...
Saturday, April 17, 2021

Crystal lattice Structure of Oxides:

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(1)  Spinel Structure:   (2)   Corundum (Al2O3) type Structure: (3)   Rutile (TiO2) type Structure: (4)   Pervoskite (ABO3) type structure: ...

Corundum (Al2O3) type Structure:

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This type structure is exhibited by oxides of trivalent metals for examples Fe 2 O 3 , Al 2 O 3 , Cr 2 O 3 , Mn 2 O 3 etc. General formula...

Rutile (TiO2) type Structure:

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This type of structure is represented by TiO 2 and other example are includes MnO 2 , SnO 2 , MgF 2 , NiF 2  etc   In Rutile structure:...

Pervoskite (ABO3) type structure:

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ABQ 3 is a proto type solid where A is a divalent cation   and B is a tetravalent cation. A +2 = Divalent cations B +4 = Tetravalent c...