A crystal or crystalline solid is a solid material whose constituents, such as atoms, molecules or ions, are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions. In addition, macroscopic single crystals are usually identifiable by their geometrical shape, consisting of flat faces with specific, characteristic orientations.
The scientific study of crystals and crystal formation is known as 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 κρύσταλλος (krustallos), meaning both “ice” and “rock crystal”, from κρύος (kruos), "icy cold, frost".
Examples of large crystals include snowflakes, diamonds, and table salt. Most inorganic solids are not crystals but polycrystals, i.e. many microscopic crystals fused together into a single solid. Examples of polycrystals include most metals, rocks, ceramics, and ice. A third category of solids is amorphous solids, where the atoms have no periodic structure whatsoever. Examples of amorphous solids include glass, wax, and many plastics.
Crystal is a form of matter significant in chemistry and mineralogy.
Crystal may also refer to:
Crystals are solid materials whose constituent atoms, molecules, or ions are arranged in an orderly repeating pattern.
Crystals may also refer to:
Grey or gray (see spelling differences) is an intermediate color between black and white. It is a neutral or achromatic color, meaning literally that it is a color "without color". It is the color of a cloud-covered sky, of ash and of lead.
The first recorded use of grey as a color name in the English language was in AD 700.Grey is the dominant spelling in European and Commonwealth English, although gray remained in common usage in the UK until the second half of the 20th century.Gray has been the preferred American spelling since approximately 1825, although grey is an accepted variant.
In Europe and the United States, surveys show that grey is the color most commonly associated with neutrality, conformity, boredom, uncertainty, old age, indifference, and modesty. Only one percent of respondents chose it as their favorite color.
Grey comes from the Middle English grai or grei, from the Anglo-Saxon graeg, and is related to the German grau. The first recorded use of grey as a color name in the English language was in AD 700.
Grey: Fifty Shades of Grey As Told by Christian, also referred to as Grey, is a 2015 erotic romance by British author, E. L. James. It is the fourth installment in the Fifty Shades series, which had its start as fanfiction for the popular vampire fiction series Twilight. The books were originally written from the female character's point of view; whereas Grey is written from the male character's point of view and is a retelling of the events of the first installment.
The novel was released on 18 June 2015 to coincide with the birth date of the character Christian Grey. The work's first printing run consisted of 1.25 million copies.
Christian Grey, a successful and rich 27-year-old businessman, meets 21-year-old university student Anastasia "Ana" Steele when she interviews him on behalf of her friend/roommate Katherine "Kate" Kavanagh (being sick with the flu at the time) for the university newspaper. The characters develop an attraction for each other and Christian proposes a sadomasochistic relationship with Ana.
Grey (or de Grey) is a surname. It may refer to: