Question

in a solid state tell the numbers of crystal system and bravais lattices??

Answer 1

In a solid state there can be 7 types of Crystal Systems or Bravais Lattices.

These are =>

1. Cubic / Isometric

2. Tetragonal

3. Orthorhombic

4. Rhombohedral / Trigonal

5. Hexagonal

6. Monoclinic

7. Triclinic

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Hope it was helpful.

Answer 2

In a first step one divides the Bravais lattices into 7 crystal systems which are defined by the lengths aa, bb, cc and angles αα, ββ, γγ between the primitive translation vectors. The resulting crystal systems are listed and visualised below.



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 different lattices according to the shape of the parallelepiped spanned by its primitive translation vectors.

classification with respect to symmetry. Consider for example the


 unit cells :

While cell

(a) is the actual unit cell spanned by the primitive translation vectors, it does not show the symmetry of the lattice properly whereas cell

(b) clearly shows the two axes of rotation.




the 14 Bravais Lattices which are depicted below ordered by the crystal systems: