Differentiate crystalline and amorphous materials, Other Engineering

Q. Differentiate crystalline and amorphous materials?

(a)Crystalline solids: Those solids in which the, ions atoms or molecules in a definite regular repeated three dimensional pattern are called solids. Thus the atoms or molecules in crystalline solid are arranged just as the sliders do on the parade ground.

 e.g.Calcite, rock-salt, quartz, sugar-mica, diamond etc.

(b)Amorphous solids: Those solids in which the constituent atoms or molecules are not arranged in a definite pattern, repeating in three dimensions are called amorphous solid or materials.

e.g.plastic, glass etc.


Crystalline materials

Amorphous materials

(a)  The constituent's ions or molecules in a given crystalline solid are arranged in a definite geometrical pattern.

The constituent's atoms or molecules in these solids are not arranged in a regular definite geometrical pattern.

(b)  These have a definite external geometrical shape.

These are not regular in their external shape.

(c)  These have a long range order of atoms or molecules.

These do not have a long range order of atoms or molecules.

(d)  All the bonds among molecules in these solids are equally strong. The crystalline solids have a sharp melting point.

Amorphous solid do not have a sharp melting point, because the weakest bond get reputed at lower temperature and stronger bonds get reputed at higher temperature.

(e) These are anisotropic i.e. the bond of crystalline solids have directional properties.

These solids sre isotropic as their physical properties are same in all direction.

In crystalline solids the angles between the flat surfaces of the crystal are constant.

These are super cooled  liquid of high viscosity.

Posted Date: 8/1/2012 8:44:31 AM | Location : United States







Related Discussions:- Differentiate crystalline and amorphous materials, Assignment Help, Ask Question on Differentiate crystalline and amorphous materials, Get Answer, Expert's Help, Differentiate crystalline and amorphous materials Discussions

Write discussion on Differentiate crystalline and amorphous materials
Your posts are moderated
Related Questions
How to draw diagrams for Rankine cycle


Question 1 What is a computer? Explain the block diagram of a general purpose digital computer Question 2 Explain the instruction format of an assembler Question 3

Which type of financing is appropriate to each firm?

A concrete block manufacturer operates a natural gas-fired furnace-type curing kiln (rated at 20 Mbtu/hr) and consumes 820, 000, 000 cubic meters of fuel annually.  Being similar t

working principle of storage oscilloscope


dhpl is the firm situated in faridabad,its ending year on 31st march 2009 ,1000million asset base rs.650 million & the net profit of the company was 76 milloin the managmnt of the


Give justification towards the development of Rapid Prototyping?