Af appeared to be well suited for the study of these matters, since it is a normal paramagnet, with three unpaired electrons on the chromium, its crystal structure is very simple, and the unknown position of the hydrogen in the strong Af bond provides structural interest.

Douglass has studied the crystal structure of Af by x-ray diffraction.

It has the same crystal structure as red phosphorus and black arsenic, it oxidizes in air and may ignite spontaneously.

Most metals and alloys can be work hardened by creating defects in their crystal structure.

This causes the iron crystals to deform intrinsically when the crystal structure tries to change to its low temperature state, inducing great hardness.

These intermetallic alloys appear homogeneous in crystal structure, but tend to behave heterogeneous, becoming hard and somewhat brittle.

A perfect crystal is one in which the internal lattice structure extends uninterrupted in all directions.

* Interactive 3D-structure of aspirin with detailed x-ray crystal structure

In the early 20th century it was recognized that other cases such as carbon were due to differences in crystal structure.

As of 2012, no crystal structure is available for class I AC.

They contain only one phase, with face-centered cubic crystal structure.

Beryllium is a steel gray and hard metal that is brittle at room temperature and has a close-packed hexagonal crystal structure.

* Basis ( crystal structure ), the positions of the atoms inside the unit cell

The crystal has a double-hexagonal close packing structure with the layer sequence ABAC and so is isotypic ( having a similar structure ) with α-lanthanum and α-forms of actinides beyond curium.

This crystal structure changes with pressure and temperature.

An example of a 4-stranded Antiparallel ( biochemistry ) | antiparallel β sheet fragment from a crystal structure of the enzyme catalase ( PDB file 1GWE at 0. 88Å resolution ).

The scientific definition of a " crystal " is based on the microscopic arrangement of atoms inside it, called the crystal structure.

A crystal structure ( an arrangement of atoms in a crystal ) is characterized by its unit cell, a small imaginary box containing one or more atoms in a specific spatial arrangement.

As a halite crystal is growing, new atoms can very easily attach to the parts of the surface with rough atomic-scale structure and many dangling bonds.

This is determined by the crystal structure ( which restricts the possible facet orientations ), the specific crystal chemistry and bonding ( which may favor some facet types over others ), and the conditions under which the crystal formed.

Spot retains the same decor although crystal chandeliers have been installed above the terrace dining area, and the kitchen has undergone a remodeling job.

Microscopically, a single crystal has atoms in a near-perfect Periodic function | periodic arrangement ; a polycrystal is composed of many microscopic crystals ( called " crystallite s " or " grains "); and an amorphous solid ( such as glass ) has no periodic arrangement even microscopically.

An ideal crystal has every atom in a perfect, exactly repeating pattern.

Like a grain boundary, a twin boundary has different crystal orientations on its two sides.

The distinctive mark of an impact crater is the presence of rock that has undergone shock-metamorphic effects, such as shatter cones, melted rocks, and crystal deformations.

For many geologic applications, isotope ratios are measured in minerals that give the amount of time that has passed since a rock passed through its particular closure temperature, the point at which different radiometric isotopes stop diffusing into and out of the crystal lattice.

Inorganic compounds show rich variety: A: Diborane features Three-center two-electron bond | unusual bonding B: Caesium chloride has an archetypal crystal structure C: Cyclopentadienyliron dicarbonyl dimer | Fp < sub > 2 </ sub > is an Organometallic chemistry | organometallic complex D: Polydimethylsiloxane | Silicone's uses range from breast implant s to Silly Putty E: Grubbs ' catalyst won the Nobel Prize in Chemistry | 2005 Nobel Prize for Robert H. Grubbs | its discoverer F: Zeolite s find extensive use as molecular sieve s G: Copper ( II ) acetate surprised Theoretical chemistry | theoreticians with its diamagnetism

CRT technology has been replaced by flat screen technologies ( such as liquid crystal display ( LCD ), light emitting diode ( LED ) and plasma displays ) on television sets and computer monitors.

At 4. 2 K it has a rhombohedral crystal system ( with a nine-layer repeat spacing ); at higher temperatures it transforms to face-centered cubic and then body-centered cubic.

Lanthanum is a soft, malleable, silvery white metal which has hexagonal crystal structure at room temperature.

Kent Displays has also developed a " no power " display that uses polymer stabilized cholesteric liquid crystal ( ChLCD ).

Natrolite is a mineral series in the zeolite group ; this sample has a very prominent acicular crystal habit.

It has a particularly complicated crystal structure that was only fully described in 1986.

The Born criterion is based on rigidity catastrophe caused by the vanishing elastic shear modulus, e. g. when the crystal no longer has sufficient rigidity to mechanically withstand load.

The N-terminal tail of histone H4, on the other hand, has a region of highly basic amino acids ( 16-25 ), which, in the crystal structure, forms an interaction with the highly acidic surface region of a H2A-H2B dimer of another nucleosome, being potentially relevant for the higher-order structure of nucleosomes.

One study has found that thin films of M13 bacteriophage can be used to construct a piezoelectric generator sufficient to operate a liquid crystal display.

There has to be a crystal for each dot of the display, i. e. eight per character.

At a certain temperature, the crystal structure has formed sufficiently to prevent diffusion of isotopes.

The most stable and dense form of selenium has a gray color and hexagonal crystal lattice consisting of helical polymeric chains, wherein the Se-Se distance is 237. 3 pm and Se-Se-Se angle is 130. 1 degrees.

For some of the synthetically produced transuranic elements, available samples have been too small to determine crystal structures.

There are multiple technologies that have been used to implement liquid crystal displays ( LCD ).

Alternatively, domino sets have been made from many different natural materials: stone ( e. g., marble, granite or soapstone ); other hardwoods ( e. g., ash, oak, redwood and cedar ); metals ( e. g., brass or pewter ); ceramic clay, or even frosted glass or crystal.

Mineralogists have been able to use the pressure and temperature data from the seismic and modelling studies alongside knowledge of the elemental composition of the Earth at depth to reproduce these conditions in experimental settings and measure changes in crystal structure.

Specifically, bent-core molecules ( sometimes called banana liquid crystals ) have been shown to form liquid crystal phases that are chiral.

Specialty caramel or crystal malts have been subjected to heat treatment to convert their starches to sugars nonenzymatically.

The histone tail extensions constitute up to 30 % by mass of histones, but are not visible in the crystal structures of nucleosomes due to their high intrinsic flexibility, and have been thought to be largely unstructured.

The earliest known lenses were made from polished crystal, often quartz, and have been dated as early as 700 BC for Assyrian lenses such as the Layard / Nimrud lens.

Livermore had been working on x-ray lasers for some time, but Chapline found a new solution that used the massive release of x-rays from a nuclear warhead as the source of light for a small baseball-bat sized lasing crystal in the form of a metal rod.

* Tamsui: A-gei ( 阿給, āgěi ), which are deep fried tofu that have been stuffed with crystal noodles and sealed with fish paste and drizzled with spicy sauce on the outside.

Since that success, over 73761 X-ray crystal structures of proteins, nucleic acids and other biological molecules have been determined.

Although this is the original method by which protein crystal structures were solved, it has largely been superseded by MAD phasing with selenomethionine.

Such phases have been exploited by the introduction of liquid crystal technology.

Individual crystals over 10 meters across have been found, and the world's largest crystal was found within a pegmatite.

The crystal structure of human foamy virus integrase has been examined successfully.

A crystal lens, turned on the lathe, was discovered by Austen Henry Layard at Nimrud along with glass vases bearing the name of Sargon ; this could explain the excessive minuteness of some of the writing on the Assyrian tablets, and a lens may also have been used in the observation of the heavens.

The symmetry of the HTS order parameter has been studied in nuclear magnetic resonance measurements and, more recently, by angle-resolved photoemission and measurements of the microwave penetration depth in a HTS crystal.

The first raid backfires because the team is unaware that the temple they plan to rob has been built of laser-reflecting crystal, which turns their beams back on themselves.

4 September saw a small crew sent to States Island to search for a type of crystal that had been noticed earlier.

The amplitude of the motion has been exaggerated for ease of viewing ; in an actual crystal, it is typically much smaller than the lattice spacing.

It is known that he had suffered several tragedies in his life, and had been persecuted to some degree for his cryptic esoteric writings about the future, reportedly derived through a use of a crystal ball.

They have been used as models of traffic, material fracture, crystal growth, biological growth, and various sociological, geological, and ecological phenomena.