Crystallographic notation, Other Engineering

Assignment Help:

Q. What do you understand by crystallographic notation of atomic planes/Explain with the help of examples.

Ans.Crystallographic Notation

1. Crystal Symmetry:                   2: Miller Indices

1. Crystal Symmetry: The symmetry of a crystal indicates that in a lattice if the parts of an ideal crystal are interchange, the various direction are geometrically equivalent. The unit atomic groups also have like properties just like the original crystal. Symmetry of a crystal form is determined by the position of similar faces, diagonals etc.

    (a)Symmetry plane: If we cut the crystal along the plane which divides it into two similar halves so that one half is the reflection of the other half, such a plane is called plane of symmetry.

     (b)Centre of symmetry: It is point in a crystal which is equidistant from all the faces of the crystal. If a line is a drawn from this, it shows a reflection through a point instead of a reflection in a plane.

A crystal may have one or more axis or plane of symmetry is only one.

Symmetry Axis: The axis of symmetry is the imaginary line-passing through the centre of the crystal, about which the crystal may be rotated so that, it presents an identical appearance more than once in the course of rotation.

2. Miller indicates                                                                                                                 

     Some characteristics of miller indicate are:

  1. A plane which is parallel to any one of coordinate's axes has an intercept of infinity and thus, the miller index for that axis is zero.
  2. Miller indices do not only define a particular plain but a set of parallel plane.
  3. Only the ratio of indices is important.
  4. if (h,k,l)are the miller indices of a plane, then the plane cuts the axes into a/h,b/h and c/l equal segment respectively.
  5. All the parallel equidistant planes have the same miller indices, therefore the miller indices define a set of parallel planes.
  6. A plane parallel to one of the coordinate axes has an intercept of infinity.

Related Discussions:- Crystallographic notation

Commercial buildings - fire protection engineering, Commercial buildings - ...

Commercial buildings - fire protection engineering: The term 'commercial buildings' refers to any buildings that are not residential buildings and that do not fall under the m

#, • ''Discussed Since the promised return on Russian government debt is mu...

• ''Discussed Since the promised return on Russian government debt is much higher than the promised return on US government debt, you should invest your money in Russia

Wing design for a sports glider , Wing design for a sports glider  Th...

Wing design for a sports glider  The justification of the aerofoil selection with appropriate data, based on tunnel work or computational analysis.  Sizing of the wing in

Telecommunication Networks., Hi there, I''ve sent an email to you guys abou...

Hi there, I''ve sent an email to you guys about Telecommunication Networks assignment and I haven''t yet received any reply. Pleases let me know if you have received it. Thank yo

Naval architecture and marine engineering, i have a coursework for finite e...

i have a coursework for finite element analysis of marine structure and i need help to solve it

Automatic interior car lights control, hi there, i need to know if its poss...

hi there, i need to know if its possible to create a circuit of automatic interior car lights control

Engineering mechanics, a circular roller of radius 10cm and of weight 1.8kn...

a circular roller of radius 10cm and of weight 1.8kn rest on a smooth horizontal surface

Nozzle guide vane inspection, Nozzle Guide Vane Inspection: Inspection ...

Nozzle Guide Vane Inspection: Inspection of the NGVs is possible using a strong light source and mirror, it is more probable however that a boroscope inspection will be require

Finance derivative, What are the no-arbitrage lower bound, and the no-arbit...

What are the no-arbitrage lower bound, and the no-arbitrage upper bound, of the vertical spread c(k1)-c(k2)?

Linear lateral dynamics, Linear lateral dynamics The second order (two ...

Linear lateral dynamics The second order (two degree of freedom) Dutch-Roll approximation is an approximation to the abovefourth order system for the Dutch Roll dynamics. A jus

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd