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

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

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

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

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CRT technology has been replaced by flat screen technologies ( such as liquid crystal display ( LCD ), light emitting diode ( LED ) and plasma displays ) on television sets and computer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

A crystal structure of a tetranucleosome has been presented and used to build up a proposed structure of the 30 nm fiber as a two-start helix.

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.

However, in the grading of emerald, crystal is considered a close second.

One inevitable ambiguity about these structures relates to the strong evidence that channels change conformation as they operate ( they open and close, for example ), such that the structure in the crystal could represent any one of these operational states.

For example, injection of a flux of a liquid crystal between two close parallel plates ( viscous fingering ), causes orientation of the molecules to couple with the flow, with the resulting emergence of dendritic patterns.

When the planes of an ionic bond slide past one another, the resultant change in location shifts ions of the same charge into close proximity, resulting in the cleavage of the crystal ; such shift is not observed in covalently bonded crystals where fracture and crystal fragmentation occurs.

A close view of a thorium crystal.

At room temperature zirconium exhibits a hexagonally close packed crystal structure, α-Zr, which changes to β-Zr a body-centered cubic crystal structure at 863 ° C.

The key appeared to be to place the input and output contacts very close together on the surface of the crystal on either side of this region.

The electron-emitting and collecting leads would both be placed very close together on the top, with the control lead placed on the base of the crystal.

This means that a tuning fork crystal oscillator will resonate close to its target frequency at room temperature, but will slow down when the temperature either increases or decreases from room temperature.

The style is also close to Amber Ale, though Amber Ales are darker and maltier due to use of crystal malts.

High pressure pressing can achieve density for the material very close to the theoretical crystal density of the base explosive material.

During his first close encounter with a sandworm in Dune, Paul Atreides notes, " Its mouth was some eighty meters in diameter ... crystal teeth with the curved shape of crysknives glinting around the rim ... the bellows breath of cinnamon, subtle aldehydes ... acids ..."

The crystal structure of armalcolite is close to that of distorted brookite.

At conditions that are close to the equilibrium between dissolution and deposition, the deposition of the semiconductor crystal on the substrate is relatively fast and uniform.

The Doctor, seeing the Buccaneer pull close, realizes that the focus must have been smuggled aboard somehow, and as he describes it, Tegan tells him about the crystal in the tiara.

In the case of an LCD, this effect is utilized by using two directors arranged at right angles and placed close together with the liquid crystal between them.

Solving for, we see that the required stress is 3. 4 GPa, which is very close to the theoretical strength of the crystal.

has found generalizations of these rules to arbitrary compact semisimple Lie groups, using his path model, an approach to representation theory close in spirit to the theory of crystal bases of Lusztig and Kashiwara.

There exits a close analogy of geometry of spacetime with the structure of defects in crystal.

where Ω is the number of possible molecular arrangements of the crystal, at some suitable temperature range close to 0 K.

The angle between bonds in the crystal lattice is very close to the tetrahedral angle of 109. 5 °, which is also quite close to the angle between hydrogen atoms in the water molecule ( in the gas phase ), which is 105 °.