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

SYSTEMS ENGINEERING, i need 3 areasof application of lunear programming

i need 3 areasof application of lunear programming

Cell arrays matlab, Expertsmind.com offers  Cell Arrays matlab assignment ...

Expertsmind.com offers  Cell Arrays matlab assignment help In matlab, Cell arrays are just like frequent arrays in that they are "indexed" details of information, with an out

#title.electronic devices., Advantages and dis advantages of a diode in ser...

Advantages and dis advantages of a diode in series /shunt

Origin-destination matrix, (a)  Explain briefly any five roadway elements. ...

(a)  Explain briefly any five roadway elements. Include function and current practices used in the design of these elements. (b)  Discuss any three emerging (i.e. 'Intelligent T

Aircraft fuel gauges, Aircraft fuel gauges Fuel gauge senders are capac...

Aircraft fuel gauges Fuel gauge senders are capacitor transducers that consist of concentric tubular electrodes from top to bottom of the tank. They are distributed at various

Technical Paper, I need help summarizing a technical paper.

I need help summarizing a technical paper.

Normal spectrum, Q. What is a normal spectrum? Show that grating spectrum i...

Q. What is a normal spectrum? Show that grating spectrum is a normal spectrum. Ans. Normal spectrum and the dispersive power of grating is defined as the rate of change of a

Aerospace engineering, Define the aircraft axes & degrees of freedom. Analy...

Define the aircraft axes & degrees of freedom. Analyse the different maneuvers that can be done by an aircraft.

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