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The simplest unit of three dimensional a...

The simplest unit of three dimensional arrangement of lattice points which sets the pattern for whole lattice is callled

A

space lattice

B

simple lattice

C

unit cell

D

crystal lattice

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The correct Answer is:
C
It is a fact.
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Give the significance of "lattice point."

The regular three dimensional arrangement of points in a crystal is known as crystal lattice and the smallest repeating pattern in the lattice is called unit cell. The unit cells are characterised by the edge lengths a, b, c and the angles between them alpha, beta and gamma respectively. Based on this, there are seven crystal systems. In a cubic unit cell: a=b=c and alpha = beta=gamma=90^(@) The number of points in simple, body centred and face centred cubic cells are 1,2 and 4 respectively In both the hcp and ccp of spheres, the number of tetrahedral voids per sphere is two while the octahedral voids is one. A double triangular void surrounded by three spheres above and three spheres below is called

The regular three dimensional arrangement of points in a crystal is known as crystal lattice and the smallest repeating pattern in the lattice is called unit cell. The unit cells are characterised by the edge lengths a, b, c and the angles between them alpha, beta and gamma respectively. Based on this, there are seven crystal systems. In a cubic unit cell: a=b=c and alpha = beta=gamma=90^(@) The number of points in simple, body centred and face centred cubic cells are 1,2 and 4 respectively In both the hcp and ccp of spheres, the number of tetrahedral voids per sphere is two while the octahedral voids is one. In a face centred cubic cell, an atom at the face contributes to the unit cell

The regular three dimensional arrangement of points in a crystal is known as crystal lattice and the smallest repeating pattern in the lattice is called unit cell. The unit cells are characterised by the edge lengths a, b, c and the angles between them alpha, beta and gamma respectively. Based on this, there are seven crystal systems. In a cubic unit cell: a=b=c and alpha = beta=gamma=90^(@) The number of points in simple, body centred and face centred cubic cells are 1,2 and 4 respectively In both the hcp and ccp of spheres, the number of tetrahedral voids per sphere is two while the octahedral voids is one. The C.N of cation occuppying an octahedral vois is:

How many three dimensional lattices are possible ?

The effective number of lattice points per unit cell

NIKITA PUBLICATION-SOLID STATE -Multiple Choice Questions (II. CRYSTAL LATTICE AND UNIT CELL )
  1. What are the correct axial distance and axial angles for rhombohedral ...

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  2. The number of atoms in a unit cell of a cubic crystal system is 2, the...

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  3. Which of the following is not a crystal system?

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  4. Byavais lattices are of

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  5. In a monoclinic unit cell the relation of sides and angles are respect...

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  6. The unit cell with crystallographic dimensions, a ne b ne c, alpha =ga...

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  7. The edge atom of a a cube provides how many atoms to the unit cell ?

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  8. The number of atoms in a cubic based unit cell having one atom on each...

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  9. K(2)Cr(2)O(7) is an example of

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  10. Copper belongs ot

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  11. Explain how much portin of an atom located at (a) corner and (b) body ...

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  12. The coordination number of Cu is

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  13. Graphite belongs to

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  14. The edge lengths of the unit cells in terms of the radius of spheres c...

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  15. In the distance between Na^(+) and CI^(-) ions in sodium chliride crys...

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  16. Diamond belongs to the crystal system :

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  17. For Trigonal system, axial rations are a = b = c and the axial angle...

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  18. Which of the following type of cubic lattice has maximum number of at...

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  19. The number of atoms per unit cell in a simple cube, face - centred cub...

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  20. The simplest unit of three dimensional arrangement of lattice points w...

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