Search Results - Crystalline
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A crystal or crystalline solid is a solid material whose constituent atoms, molecules, or ions are arranged in an orderly repeating pattern extending in all three spatial dimensions. The scientific study of crystals and crystal formation is crystallography. The process of crystal formation via mechanisms of crystal growth is called crystallization or solidification. The word crystal is derived from the ancient Greek word ???sta???? ( krustallos), which had the same meaning, but according to the ancient understanding of crystal. At root it means anything congealed by freezing, such as ice. [1] The word once referred particularly to quartz, or "rock crystal". Most metals encountered in everyday life are polycrystals. Crystals are often symmetrically intergrown to form crystal twins. The process of forming a crystalline structure from a fluid or from materials dissolved in the fluid is often referred to as crystallization. In the ancient example referenced by the root meaning of the word crystal, water being cooled undergoes a phase change from liquid to solid beginning with small ice crystals that grow until they fuse, forming a polycrystalline structure. The physical properties of the ice depend on the size and arrangement of the individual crystals, or grains, and the same may be said of metals solidifying from a molten state. Which crystal structure the fluid will form depends on the chemistry of the fluid, the conditions under which it is being solidified, and also on the ambient pressure. While the cooling process usually results in the generation of a crystalline material, under certain conditions, the fluid may be frozen in a noncrystalline state. In most cases, this involves cooling the fluid so rapidly that atoms cannot travel to their lattice sites before they lose mobility. A noncrystalline material, which has no long-range order, is called an amorphous, vitreous, or glassy material. It is also often referred to as an amorphous solid, although there are distinct differences between crystalline solids and amorphous solids most notably, the process of forming a glass does not release the latent heat of fusion.
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Showing 1 to 25 of 95 Articles matching 'Crystalline' in related articles. |
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1. Cubic zirconia jewelry - Better than diamond!
November 06, 2009
The origin of Cubic Zirconia is the cubic crystalline form of zirconium dioxide which is very hard in form and colorless but can be given various colors. It is in the form of crystals which is man made by combining Zirconia Powder and yttrium oxide at a temperature of 5000 degree Fahrenheit. The material is kept for some time to get cool and once it gets cooled beautiful crystals appear in sparkling and shiny forms which are very hard and durable. If gone through a UV rays Cubic Zirconia changes to yellow, or greenish yellow. The various features that make Cubic Zirconia distinguished with Dia... (read more)
Author: Tina Black
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2. New Trend : Crystallized Design
November 05, 2009
Everyone can find out how to make crystallized design. Some would even earn a living out of their hobby on crystallized design. To make dazzling and superb jewelry or some accessories, you'd need to loose your talent and at the same time, have a little bit of patience. Some popular types of crystals would be Swarovski crystal which is an Austrian crystal, celestial crystal and Czech glass. As well as these, there are crystals frequently called healing crystals. There are typically left in their natural state and unfinished. There are crystalline stones which are made as crystal jeweller... (read more)
Author: Pearcy Palymer
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3. Things You Should Know About Pearl Necklaces
November 05, 2009
A pearl necklace is a hard object that is created within the shell of a mollusk. it is made up of calcium carbonate in a crystalline mineral form. The usual pearl is perfectly round, but sometimes a baroque pearl can be found. Although pearls can be found in freshwater areas, pearls from the sea tend to cost more.In more modern times, pearls are harvested, and some are just cheap, inexpensive imitation pearl necklaces. The natural ones, found in the sea, are very rare. Even more rare are natural ones of gemstone quality, which are almost always iridescent and/or nacreous. Centuries ago, a pear... (read more)
Author: Evelyn Quick
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4. Different Ways of Wearing Pearl Necklaces
November 05, 2009
A pearl necklace is a hard object that is created within the shell of a mollusk. it is made up of calcium carbonate in a crystalline mineral form. The usual pearl is perfectly round, but sometimes a baroque pearl can be found. Although pearls can be found in freshwater areas, pearls from the sea tend to cost more. In more modern times, pearls are harvested, and some are just cheap, inexpensive imitation pearl necklaces. The natural ones, found in the sea, are very rare. Even more rare are natural ones of gemstone quality, which are almost always iridescent and/or nacreous.Centuries ago, a pear... (read more)
Author: Evelyn Quick
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5. Cubic zirconia rings are girl's best friend!
November 04, 2009
The origin of Cubic Zirconia is the cubic crystalline form of zirconium dioxide which is very hard in form and colorless but can be given various colors. The cost of this artificial stone is quite low and due to its low price, reliability, strength, and much more clarity than diamond, it gained popularity since 1970. It is used as substitute for Diamond due to its low economical cost and high standards. It is used in entire fashion and jeweler industry with different forms and variants. CZ rings are the very commonly used in the entire world with various good looking designs and, styles ... (read more)
Author: diana dantes
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6. Seroquel - to help in the treatment of schizophrenia and bipolar disorder, is available Online agai
November 02, 2009
Seroquel belongs to a new chemical group - dibenzothiazepine derivatives. It is an antipsychotic drug used primarily in the treatment of schizophrenia and bipolar disorder. It is generically composed of Quetiapine Fumarate, which is a crystalline powder that is moderately soluble in water. Seroquel has to be swallowed with a glassful of water or with food as the doctor advises and comes in tablet formulations of 25mg, 50mg, 100mg, 200mg, 300mg and 400 mg. Like other antipsychotics, Quetiapine blocks the chemicals that nerves use to communicate with each other. Dopamine type 2 and Seroton... (read more)
Author: noble drugstore
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7. Three Ways of Wearing Pearl Necklaces
November 02, 2009
A pearl necklace is a hard object that is created within the shell of a mollusk. it is made up of calcium carbonate in a crystalline mineral form. The usual pearl is perfectly round, but sometimes a baroque pearl can be found. Although pearls can be found in freshwater areas, pearls from the sea tend to cost more. In more modern times, pearls are harvested, and some are just cheap, inexpensive imitation pearl necklaces. The natural ones, found in the sea, are very rare. Even more rare are natural ones of gemstone quality, which are almost always iridescent and/or nacreous.Centuries ago, a pear... (read more)
Author: Sharon Austin
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8. Solar Power for Swimming Pools
October 12, 2009
If you have a pool, you know how much heating it can crank up your utility bill. Solar energy systems for pools offer an alternative strategy that will not devastate your bank account.
Solar Energy Systems for Pools
When most people bring to mind solar energy systems, they bring to mind the large crystalline structures that are meant to assemble a lot of solar energy in order to change it into solar power. However, there are other uses for solar energy systems. One of the more ingenious uses for this technology is the usage of solar energy systems for heating pools. by the usage of ... (read more)
Author: Calvin Tan
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9. Splash in the Maldives!
October 05, 2009
Sun-kissed and palm-fringed white beaches, lagoons, coral gardens...
Sunny, exclusive and unspoiled, the Maldives is often described as the paradise on earth. The perfect tropical islands with palm trees and pure white beaches surrounded by crystalline lagoons of varying shades of blue covering the coral gardens – all these make Maldives the ideal tropical holiday destination.
If you love unwinding at a serene getaway amidst nature, Maldives is the ideal place. Male, the commercial hub and capital city of the Maldives, has various places that cannot be missed, the foremost being the... (read more)
Author: Ezee Go
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10. Halong Kayaking Adventure
September 18, 2009
DAY 1: HA LONG BAY This morning we will depart Hanoi at 08.00 for a four-hour drive through the Red River Delta to Ha Long City. Upon arrival, we transfer to our boat for a cruise of the crystalline emerald waters of Halong Bay. While on board we will have a sumptuous fresh seafood lunch.
Stop to explore some of the limestone caves in the area. We then start to get to our kayaks to discover the area. When the sun comes down we drop anchor for the night. (Lunch, Dinner included)
DAY 2: HALONG BAY - HANOI This morning, we continue kayaking to explore Van gia floating village, Luon & ... (read more)
Author: papi papi
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11. Catch up a lively experience on Dubai tours
September 14, 2009
Crystalline azure water skittering on two sides of the boat, refreshing cool breeze rejuvenating the soul, captivating chill water vibrating on the palm , enchanting wide horizon glimmering in front of the eyes, eminent edifices holding the glory of the place…………all together welcomes you on the overwhelming Dubai tours. The global importance of Dubai tours magnifies with the mammoth buildings, only seven star hotels in the world so far, impeccable man made island, magnificent retail outlets to quench your shopping excitement, coveted carnival of par excellence and warm welcome of the Arab peo... (read more)
Author: Haitham Al-Amari
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12. Jaipur Gems | Jaipur Gems Chennai | Alluring Gems
September 14, 2009
A gemstone is the naturally occurring crystalline form of a mineral, which is desirable for its beauty, valuable in its rarity and durable enough to be enjoyed for generations. There are more than 40 popular gem varieties and many rarer collector gemstones. Although some gemstone varieties have been treasured since before history began and others were only discovered recently, they are all nature's gifts to us. Gemstones are so fascinating! Their colors, properties, myths, and legends are diverse and fascinating. Folklore about stones has been revered and honored for centuries in all culture... (read more)
Author: Sita S
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13. Penicillin G Procaine
September 02, 2009
Penicillin G procaine (also known as APPG, Aqueous Procaine Penicillin G , Benzylpenicillin Procaine, Procaine Penicillin G, Procaine Benzylpenicillin) is the procaine monohydrate salt of penicillin G. In vivo it is hydrolyzed to penicillin G and acts as a depot, or repository form of penicillin G. It occurs as white crystals or very fine, white crystalline powder. Approximately 4-4.5 mg are soluble in 1 ml of water and 3.3 mg are soluble in 1 ml of alcohol. Potency of penicillin G procaine is usually expressed in terms of Units. One mg ofpenicillin G procaine is equivalent to 900-1050 USP ... (read more)
Author: zhang xu
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14. Crystal Meth Addiction Symptoms and Signs
September 02, 2009
Crystal Meth is simply methamphetamine, which is very popular among drug users. This is generally crystalline in structure, whose street names are "icy" and "cristy". This is a very addictive type of drug. Statistics have shown that 42 percent of those who have tried it for the first time feel the need to try it once again. This drug affects the body mentally and physically.
Crystal Meth addiction is an issue that has been plaguing the modern world. It is known as the intense, almost maddening urge to consistently look for a substance at a prolonged period of time. It never ceases, and th... (read more)
Author: Crystal Smith
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15. Acrylic Case for iPod Nano from Inspiretech
August 19, 2009
The Inspiretech Acrylic case for the iPod Nano is a departure from the colorful and opaque cases they have come to be known for. The Acrylic case is almost crystalline in nature and gives the iPod Nano a sleek and protected look. Made from high quality materials, the Acrylic case prevents against scratches and dents to keep the iPod Nano looking new. Reviews have generally been very favorable of the new case and many critics have cited it for being a refreshing new look for the company's products. Check below for some more specific features of the device.
Features
- Protects Player ... (read more)
Author: ray ibanez
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16. Pleural Mesothelioma Facts
August 04, 2009
Mesothelioma is the commonest primary tumor of the pleura. There are two main types; 1] the localized mesothelioma{bening and malignant types} 2] the diffuse malignant mesothelioma
Causes There is a strong correlation between asbestos exposure and the development of mesothelioma, although a history of exposure is not always obtainable in patients who have mesothelioma. There are 2 types of asbestos fibres based on crystalline structure; a-serpentine {chrysolite} and b-amphibole. Included within the amphibole are amosite, tremolte, crocidolite and anthophyllite. The most harmful is the ... (read more)
Author: Bello Kamorudeen
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17. Pleural Mesotheloma- Facts you should know
August 04, 2009
Mesothelioma is the commonest primary tumor of the pleura.There are two main types;
1]the localized mesothelioma{bening and malignant types} 2]the diffuse malignant mesothelioma
Causes
There is a strong correlation between asbestos exposure and the development of mesothelioma,although a history of exposure is not always obtainable in patients who have mesothelioma.There are 2 types of asbestos fibres based on crystalline structure;a-serpentine{chrysolite}and b-amphibole.
Included within the amphibole are amosite,tremolte,crocidolite and anthophyllite.The most harmful is the... (read more)
Author: Bello Kamorudeen
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18. About Birth Gems
August 03, 2009
Each such class of stones can have a definite crystalline and optical identity to communicate of, which shall offer a singular identity to the gemstone jewellery produced from them. These stories do have some systematic reasoning as well to rely on, as the human mind is understood to react depending on the type of optical and colorful displays it suffered exposure to. We are going to look at some of these story telling facts about gemstones and their influences in the common-or-garden life through the following paragraphs. We constantly wear gemstone rings encrusted with Sapphires or Rubies... (read more)
Author: Andy Roman
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19. Cataract Eye Surgery, Phacoemulsification Cataract Surgery
July 31, 2009
The crystalline lens is the main part of the focusing mechanism of human eye. The lens which is clear and transparent becomes cloudy and opaque with age and thereby hampering normal vision. Any opacity in the crystalline lens, which leads to decreased vision, is Cataract. Aging is the most common cause for Cataract. Proteins of the eye get reduced with the age and this leads to Cataract. Other causes include congenital and developmental anomalies, trauma, inflammation of the eye and metabolic diseases like Diabetes and Hypothyroidism. Cataract makes simple tasks difficult and in some cas... (read more)
Author: Nethradhama Hospital
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20. Marble From Olympicstone
July 31, 2009
Marble is metamorphosed limestone, composed of fairly pure calcite (a crystalline form of calcium carbonate, CaCO3). It is extensively used for sculpture, as an building material, and in many other applications. This metamorphic process causes a complete recrystallization of the original rock into an interlocking mosaic of calcite and/or dolomite crystals. The temperatures and pressures necessary to form marble usually destroy any fossils and sedimentary textures present in the original rock.
Pure white marble is the result of metamorphism of very pure limestones. The characteristic swir... (read more)
Author: Helen Zahralban
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21. LCD TV for ultimate viewing experience
July 28, 2009
What is LCD Television? The term LCD denotes Liquid Crystal Diode through which the Companies have revolutionized the very basic home appliance i.e. Television set. This liquid crystal technology has evolved slim looking, cool and bright displays that seem to hang everywhere from bank lobbies to corporate offices to the consumer’ living rooms.
This crystal is a twisted crystalline structure which untwists to various degrees according to the different voltage currents to which it is exposed. There are two perpendicular aligner panes of polarized glass which sandwich a solution of liquid c... (read more)
Author: Tom Lopez
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22. The Side Effects of Caffeine #1
June 08, 2009
Caffeine is a white crystalline xanthine alkaloid stimulant drug that acts as a stimulant drug. This bitter alkaloid is part of chemical mixtures found within insoluble complexes guaranine which is found in guarana, theine which is found in tea, as well as mateine which is found in yerba mate.
Caffeine is found in different quantities within leaves, beans, and even some fruit. For the most part humans use caffeine that has been extracted from cherries of the coffee plant as well as the leaves from the popular tea bush. Occasionally you can find caffeine as as source from the kola nut, gua... (read more)
Author: Gerald Fitz
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23. Throwing Some Light On Cataract Surgery
June 07, 2009
Cataract is very common in old age. A cataract is a clouding that develops in the crystalline lens of the eye or in its envelope, varying in degree from slight to complete opacity and obstructing the passage of light. Although related to old age, it can sometimes be caused due to eye injury, exposure to radiation or may be a birth defect in children. The main reason normally found behind cataract formation is gradual discoloration or protein clumping. They commonly affect both eyes, but it is not uncommon for a cataract in one eye to advance more rapidly. Some factors that may lead to developm... (read more)
Author: daniel rayfield
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24. More about ceramics and applications............................................
June 03, 2009
Ceramic is inorganic crystalline oxide, which is chemically inert, and can withstand high temperature to the range of 1600 degree centigrade.
For its property it is being considered a important engineering tool.
Ceramic is categorized in four types:- 1- Structural 2- Refractory 3- Pottery 4- Technical Ceramics
1-Structural ceramics are used in civil applications as Brick, pipes, floor, tiles etc. 2- In refractories it is used in Kiln linings, crucibles etc. 3- Pottery includes Tablewares., Quartz,Porcelain, Bone China, Stoneware etc. 4- Technical ceramic... (read more)
Author: Shraddha Avasthi
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25. How is opal mined?
June 02, 2009
Opal:
Opal has been a mystery for centuries. No two opals look alike. The word ‘opal’ was derived from a Greek word opallos, meaning “to see changes of color”. Opal is derived as a precious gemstone which is formed from non-crystalline silica gel. It consists of 6 to 10 per cent water and small silica spheres are arranged in a regular pattern. It generally measures 5.5 to 6.5 on MOH’s hardness scale with diamonds measuring 9 to 10 and pearls 4 to 5. It is a birthstone for October.
Opal dates back to 1849 where it was found at a cattle station named Tarrawilla, near Angaston some 80 k... (read more)
Author: Brayan Peter
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