Skip to main content

Difference Between Amorphous and Crystalline Solids

All materials can be categorized into three main states based on their nature of molecular aggregation; these categories are called solids, liquids, and gasses. Gasses and liquids are quite different from solids since they have no definite shape and take the shape of the container in which they are placed. Unlike gasses and liquids, solids have a definite three-dimensional shape with the most complex form of a molecular aggregate. Moreover, solids are relatively more hard, dense and strong in keeping their shape.

Unlike gasses and liquids, solids are not much affected by the changes in temperature or pressure. In addition, solids possess a wide range of mechanical and physical properties including electrical conductivity, thermal conductivity, strength, hardness, toughness, etc. Because of these properties, solids are used in various applications in the fields of engineering, construction, automotive, fabrication etc. Solids mainly exist in two types: amorphous and crystalline.

The main difference between amorphous and crystalline solids is that amorphous solids do not have an ordered structure whereas crystalline solids have a highly ordered structure.

 In addition to this main difference, there are many more differences between these two types of solids.
 1. What are Amorphous Solids? – Definition, Structure, Properties, Examples
 2. What are Crystalline Solids? – Definition, Structure, Properties, Examples
3. What is the difference between Amorphous and Crystalline Solids?

Difference Between Amorphous and Crystalline Solids - Comparison Summary Difference Between Amorphous and Crystalline Solids What is an Amorphous Solid Amorphous solids are defined as solids that do not have an ordered structure.

That means the atoms or ions are arranged without any definite geometrical form. Certain amorphous solids may have some orderly arrangement but it extends only for a few Angstrom units. These orderly arranged parts in amorphous solids are called crystallites. Due to the presence of disordered arrangements, amorphous solids are sometimes referred to as supercooled liquids.

The amorphous solids do not have sharp melting points, thus the liquid transformation occurs over a range of temperatures. Properties such as electrical and thermal conductivity, mechanical strength, and refractive index also do not depend on the direction of measurement; hence, they are called isotropic. Examples of amorphous solids include glass, solid polymers and plastics. Difference Between Amorphous and Crystalline Solids What is a Crystalline Solid Crystalline solids are the solids that possess highly ordered arrangement of atoms, ions or molecules in a well-defined three-dimensional structure. Moreover, these solids are characterized by their hardiness with sharp and high melting points.

Unlike amorphous solids, crystalline solids show anisotropic behavior when measuring their physical properties, which depend on the direction of measurement. Crystalline solids have definite geometrical shapes, which depend on the conditions during the crystal growth. Some examples of crystalline solids include diamond, sodium chloride, zinc oxide, sugar etc. Main Difference - Amorphous vs Crystalline Solids Difference Between Amorphous and Crystalline Solids Geometry / Structure Amorphous Solids: Amorphous solids do not have an ordered structure; they lack any pattern or arrangement of atoms or ions or any geometrical shape. Crystalline Solids: Crystalline solids have definite and regular geometry due to the orderly arrangement of atoms or ions. Melting Point Amorphous Solids: Amorphous solids do not have a sharp melting point. Crystalline Solids: Crystalline solids have a sharp melting point, where it changes into the liquid state. Heat of Fusion Amorphous Solids: Amorphous solids have no characteristic heat of fusion, thus regarded as super cooled liquids or pseudo-solids. Crystalline Solids: Crystalline solids have a definite heat of fusion, thus regarded as true solids. Anisotropy and Isotropy Amorphous Solids: Amorphous solids are isotropic because of having the same physical properties in all directions. Crystalline Solids: Crystalline solids are anisotropic and, due to which, their physical properties are different in different directions. Common Examples Amorphous Solids: Glass, organic polymers etc. are examples of amorphous solids. Crystalline Solids: Diamond, quartz, silicon, NaCl, ZnS, all metallic elements such as Cu, Zn, Fe etc. are examples of crystalline solids. Interparticle Forces Amorphous Solids: Amorphous solids have covalently bonded networks.

Crystalline Solids: Crystalline solids have covalent bonds, ionic bonds, Van der Waal’s bonds and metallic bonds. References: Jain, M. (Ed.). (1999). The Solid State. Competition Science Vision, 2(21), 1166-1177. Sivasankar. (2008). Engineering Chemistry. Tata McGraw-Hill Education. Dolter, T., & Maone, L. J. (2008). Basic Concepts of Chemistry (8th ed.). John Wiley & Sons. Image Courtesy: “Crystalline or amorphous” By Cristal_ou_amorphe.svg: Cdangderivative work: Sbyrnes321 (talk) – Cristal_ou_amorphe.svg (CC BY-SA 3.0) via Commons Wikimedia “Glass02″ By Taken byfir0002 | flagstaffotos.com.auCanon 20D + Tamron 28-75mm f/2.8 – Own work (GFDL 1.2) via Commons Wikimedia “CZ brilliant” By Gregory Phillips – English Wikipedia, original upload 18 January 2004 by Hadal en:Image:CZ brilliant.jpg (CC BY-SA 3.0) via Commons Wikimedia

Comments

Popular posts from this blog

How to get Rid of Cigarette Smoke Smell

While researching this topic, I asked a relative for some practical advice to rid my house of cigarette smoke. Their answer was immediate and to the point: QUIT SMOKING! Who isn’t tired of hearing that one? The truth is that cigarette smoke permeates into our furniture, our carpets, our walls, our windows, and just about every other nook and cranny in our homes. Us smokers are generally unaware of the smell. The same problem exists in our cars. There are large numbers of people who are allergic to cigarette smoke, or suffer some very serious breathing issues when they come into contact with it. Even the lingering smell of cigarette smoke left in a home or a car by its previous occupants is not just noticeable, but may be close to intolerable to a non-smoker. So if you’re not ready to kick the habit just yet, let’s explore some methods of controlling the cigarette smoke in our environments. Who knows, the next person to bask in your odor may be a hot date or prospective employer and if…

How does a tree neutralise your blog’s carbon footprint?

A question always asked around the net can be answered visiting


http://www.kaufda.de/umwelt/carbon-neutral/1-tree-1-blog-how-it-works/

How much carbon dioxide does your blog create?

According to a study by Alexander Wissner-Gross, PhD, physicist at Harvard University and environmental activist, an average website causes about 0.02g (0,0008oz.) of carbon dioxide for each visit. Assuming an average blog gets 15,000 visits a month, it has yearly carbon dioxide emissions of 3,6kg (8lb.). This can mainly be tracked back to the immense energy usage from (mainframe) computers, servers, and their cooling systems.

Does your blog have more than 15,000 visitors a month? Just e-mail us at CO2-neutral@kaufda.de. We make sure we neutralise your blog too.



How much carbon dioxide does a tree absorb?

Unfortunately, no precise answer is possible. The carbon dioxide absorption of a tree can differ a lot. The amount of carbon dioxide that a tree can absorb depends on the type of tree, light exposure, le…

Simple ANOTEC ENVIRONMENTAL ODOUR CONTROL

With increasing Environment Protection Authority (EPA), WorkSafe and council requirements, dust and odours can no longer be managed with a simple garden hose. In providing a solution, ANOTEC has leveraged its more than 20 years of experience across Australia and New Zealand to reduce business costs and help them find best practice equipment for the task. ANOTEC works with landfills and transfer station owners/operators to provide a custom solution to the challenges within the industry. What is it worth to a company to be issued an abatement notice over a site? That’s compared to paying a modest cost for an odour and dust management solution, allowing you to continue working uninterrupted. The technology utilises pumps to generate microscopic air droplets capable of weighing down and suppressing dust and odour. The key to effective dust suppression is creating minute water droplets in the fine micron range that are a similar size to the dust particles the site manager is hoping to…

Archive

Show more