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Crystal without defects
formations called Bravais lattices). These regions are known as crystals. A perfect crystal is a crystal that contains no point, line, or planar defects. There
Perfect_crystal
Solid material with highly ordered microscopic structure
of atom is present in a crystal. For example, a perfect crystal of diamond would only contain carbon atoms, but a real crystal might perhaps contain a
Crystal
Mathematical description in crystallography
scattering intensity. F h k ℓ {\displaystyle F_{hk\ell }} is defined for a perfect crystal, and is used in crystallography, while S ( q ) {\displaystyle S(\mathbf
Structure_factor
Thermodynamical parameter of solids
parameter is dimensionless. The expression for the Grüneisen constant of a perfect crystal with pair interactions in d {\displaystyle d} -dimensional space has
Grüneisen_parameter
Pure copper without oxygen in its crystal lattice
(1972). "The perfection of Czochralski grown copper single crystals". Journal of Crystal Growth. 16 (1): 86–87. Bibcode:1972JCrGr..16...86T. doi:10
Oxygen-free_copper
Cancelled video game
Perfect Dark is a cancelled first-person shooter game that was under development by The Initiative and Crystal Dynamics for Windows and Xbox Series X/S
Perfect Dark (cancelled video game)
Perfect_Dark_(cancelled_video_game)
Phenomenon from solid state physics
the electrical properties of crystals. In particular, they predicted that the motion of electrons in a perfect crystal under the action of a constant
Bloch_oscillation
Vector representing lattice distortion due to dislocations in a crystal
visualized without the dislocation, that is, the perfect crystal structure. In this perfect crystal structure, a rectangle whose lengths and widths are
Burgers_vector
Law of physics
entropy of a perfect crystal of a pure substance approaches zero as the temperature approaches zero. The alignment of a perfect crystal leaves no ambiguity
Third_law_of_thermodynamics
Linear crystallographic defect or irregularity
stress at which neighbouring atomic planes slip over each other in a perfect crystal suggests that, for a material with shear modulus G {\displaystyle G}
Dislocation
Collections of fine sheets of material held adjacent to one another
Christopher Chantler and refers to a very thin layer of a perfect crystal, from which curved crystal physics may be derived. In textile industry, a lamella
Lamella_(materials)
Law of electrical current and voltage
reduces to the more familiar form: V = I R . {\displaystyle V=IR.} A perfect crystal lattice, with low enough thermal motion and no deviations from periodic
Ohm's_law
Research of materials
as metals and ceramics) are microstructured. The manufacture of a perfect crystal of a material is physically impossible. For example, any crystalline
Materials_science
Phenomenon of deformation due to structural stress
{\displaystyle d} is the grain size. The theoretical yield strength of a perfect crystal is much higher than the observed stress at the initiation of plastic
Yield_(engineering)
Structure that repeats in time; a novel type or phase of non-equilibrium matter
with the atoms of a crystal—for example in Umklapp processes. Quasimomentum, however, is conserved in a perfect crystal. Time crystals show a broken symmetry
Time_crystal
American video game developer
Crystal Dynamics, Inc. is an American video game developer based in San Carlos, California. The studio is best known for its games in the Tomb Raider
Crystal_Dynamics
Ordered arrangement of atoms, ions, or molecules in a crystalline material
In crystallography, crystal structure is a description of the ordered arrangement of atoms, ions, or molecules in a crystalline material. Ordered structures
Crystal_structure
Multiple diffraction of waves
Scattering of X-Rays in Crystals. Springer, 1978. B. E. Warren: X-ray diffraction. Addison-Wesley, 1969 (chapter 14: perfect crystal theory). W. H. Zachariasen:
Dynamical theory of diffraction
Dynamical_theory_of_diffraction
Process by which a solid with a highly organized structure forms
that leads to solids with a uniform pattern of atoms or molecules, i.e. a crystal. The uniform nature of a crystalline solid can be contrasted with amorphous
Crystallization
Lowest theoretical temperature
constant minimum at 0 K. For a perfect crystal, this minimum is taken to be zero, since the system would be in a state of perfect order with only one microstate
Absolute_zero
Lowest energy level of a quantum system
determined by the degeneracy of the ground state. Many systems, such as a perfect crystal lattice, have a unique ground state and therefore have zero entropy
Ground_state
Standard entropy content of one mole of a substance under a standard state
of thermodynamics. However, this assumes that the material forms a 'perfect crystal' without any residual entropy. This can be due to crystallographic
Standard_molar_entropy
Entropy of a substance near absolute zero
monoxide crystal is cooled to absolute zero, few of the carbon monoxide molecules have enough time to align themselves into a perfect crystal (with all
Residual_entropy
American model
cosmetic surgery". CNN. Retrieved January 7, 2021. "Crystal Hefner Is Engaged to James Ward, Reveals Perfect' Wedding Destination (Exclusive)". People. May
Crystal_Hefner
Crystal type lacking 3D periodicity
stable structures were perfect crystals—some were more complex. These complex structures were later called aperiodic crystals, and they continue to be
Aperiodic_crystal
Polyhedron with 12 faces
6°. The following formulas show the measurements for the face of a perfect crystal (which is rarely found in nature). Height = 5 2 ⋅ Long side {\displaystyle
Dodecahedron
Method of crystal growth
for the production of conventional mono-Si solar cells. The almost perfect crystal structure yields the highest light-to-electricity conversion efficiency
Czochralski_method
Operator shifting particles and fields by a certain amount in a certain direction
fictitious perfect crystal, in which the potential is genuinely periodic, and (b) the effects on the properties of a hypothetical perfect crystal of all deviations
Translation operator (quantum mechanics)
Translation_operator_(quantum_mechanics)
Yellow-green phosphate mineral
commonly found in phosphate-rich pegmatites. It occurs in the form of perfect crystals grouped in druses, in pegmatites, and is often of precious-stone quality
Brazilianite
Association football club in London, England
Crystal Palace Football Club, often referred to simply as Palace, is a professional football club based in Selhurst, South London, England, which competes
Crystal_Palace_F.C.
beams—is observed when X-rays satisfying Bragg's law diffract through a perfect crystal. The minimization of absorption seen in the Borrmann effect has been
Borrmann_effect
Feature of some igneous rocks
rocks where large later-formed less perfect crystals ('oikocrysts') surround smaller early-formed idiomorphic crystals ('chadacrysts') of other minerals
Poikilitic_texture
Measure of the spread of crystal-plane orientations
of crystal plane orientations. A mosaic crystal is an idealized model of an imperfect crystal, imagined to consist of numerous small perfect crystals (crystallites)
Mosaicity
Distortion of the periodic lattice of a one-dimensional crystal
periodic lattice of a one-dimensional crystal. Atomic positions oscillate, so that the perfect order of the 1-D crystal is broken. It is named after Rudolf
Peierls_transition
in which the atoms within a region of a crystal are configured in the opposite order to those in the perfect lattice system. Throughout the entire APD
Anti-phase_domain
Disruption of the periodicity of a crystal lattice
notation. Vacancy defects are lattice sites which would be occupied in a perfect crystal, but are vacant. If a neighboring atom moves to occupy the vacant site
Crystallographic_defect
1982 film by Jim Henson, Frank Oz
The Dark Crystal is a 1982 dark fantasy film directed by Jim Henson and Frank Oz, produced by Gary Kurtz and Henson, with a screenplay by David Odell
The_Dark_Crystal
Fundamental theorem in condensed matter physics
places. (A finite-size crystal cannot have perfect translational symmetry, but it is a useful approximation.) A three-dimensional crystal has three primitive
Bloch's_theorem
Analytical technique to determine structure and composition of materials
yield in relation to a perfect crystal. By comparing the spectrum from a sample being analyzed to that from a perfect crystal, and that obtained at a
Rutherford backscattering spectrometry
Rutherford_backscattering_spectrometry
Measure of a substance's tendency towards ionic conduction
It is denoted by λ and measured in siemens per meter (S/m). While perfect crystals of inorganic compounds are typically electrical insulators, ionic conduction
Ionic conductivity (solid state)
Ionic_conductivity_(solid_state)
Degree of structural order in a solid
perfection. The most highly perfect crystals are silicon boules produced for semiconductor electronics; these are large single crystals (so they have no grain
Crystallinity
Family of double sulfate salts of aluminium
is one of the ingredients in common clay. Marggraf also showed that perfect crystals with properties of alum can be obtained by dissolving alumina in sulfuric
Alum
Type of defect in crystalline materials
can be formed during crystal growth, during plastic deformation as partial dislocations move as a result of dissociation of a perfect dislocation, or by
Stacking_fault
Separation and purification process of crystalline solids
crystallization to prevent the crystal from 'drying out'. Single perfect crystals may contain solvent of crystallization in the crystal lattice. Loss of this internal
Recrystallization_(chemistry)
American multi-instrumentalist and vocalist (born 1963)
Crystal Taliefero-Pratt (née Taliefero, born January 5, 1963) is an American multi-instrumentalist and vocalist. Taliefero grew up with a musical family
Crystal_Taliefero
Electronic structure imaging method
microscopy and spectroscopy of a perfect crystal would show the same tunneling spectrum at each point on the surface of the crystal due to translational invariance
Quasiparticle interference imaging
Quasiparticle_interference_imaging
Crystallography journal
diffraction and scattering of X-rays, electrons, and neutrons, determination of crystal structure of inorganic and organic substances, including proteins and other
Kristallografija
Form of carbon
Diamond is a mineral form of the element carbon with its atoms arranged in a crystal structure called diamond cubic. Diamond is a tasteless, odorless, strong
Diamond
Concept
frustration). The third law of thermodynamics states that the entropy of a perfect crystal at absolute zero (0 K) is zero. This means that nearly all molecular
Entropy (statistical thermodynamics)
Entropy_(statistical_thermodynamics)
the Brillouin zone, k = 0 {\displaystyle {\boldsymbol {k}}=0} . In a perfect crystal, this spectrum is preceded by a hydrogen-like series of the transitions
Giant_oscillator_strength
Tendency of crystalline materials to split along favored planes
cleavage occurs when there are four cleavage planes in a crystal. Fluorite exhibits perfect octahedral cleavage. Octahedral cleavage is common for semiconductors
Cleavage_(crystal)
Major stage of a crystallization process
structure. By contrast, perfect crystals (lacking defects) would grow exceedingly slowly. On the other hand, impurities can act as crystal growth inhibitors
Crystal_growth
Ordered chemical structure with no repeating pattern
A quasiperiodic crystal, or quasicrystal, is a structure that is ordered but not periodic. A quasicrystalline pattern can continuously fill all available
Quasicrystal
State similar to a liquid and a crystal
for crystals) distinguishes hyperuniform systems from typical gases, liquids, or amorphous solids. Examples of hyperuniformity include all perfect crystals
Hyperuniformity
Russian cosmonaut (born 1992)
payload. Roscosmos announced that, for the first time in history, perfect crystal gallium arsenide structures had been grown in outer space. Zubritsky
Alexey_Zubritsky
Generalized version of classical Green's function
a crystal or a crystalline solid is represented by a collection of interacting atoms located at discrete sites on a geometric lattice. A perfect crystal
Multiscale_Green's_function
Simple radio receiver circuit for AM reception
A crystal radio receiver, also called a crystal set, is a simple radio receiver, popular in the early days of radio. It uses only the power of the received
Crystal_radio
Physical function
definition in solid-state physics is as follows. Choose a single band in a perfect crystal, and denote its Bloch states by ψ k ( r ) = e i k ⋅ r u k ( r ) {\displaystyle
Wannier_function
Formula in X-ray diffraction and crystallography
peak widths is determined. This system, effectively a one dimensional perfect crystal, has a structure factor or scattering function S(q): S ( q ) = 1 N
Scherrer_equation
American country music singer (born 1951)
Brenda Gail Webb (born January 9, 1951), known professionally as Crystal Gayle, is an American country music singer widely known for her 1977 hit "Don't
Crystal_Gayle
Phenomenon in ferromagnetism
spins in the neighboring domain. In a perfect crystal lattice this can be a continuous process, but in actual crystals local defects in the lattice, such
Barkhausen_effect
Lowest possible energy of a quantum system or field
determined by the degeneracy of the ground state. Many systems, such as a perfect crystal lattice, have a unique ground state and therefore have zero entropy
Zero-point_energy
Crystallographic defect of atoms within gaps in a lattice
the same or of a different type, occupies an interstitial site in the crystal structure. When the atom is of the same type as those already present they
Interstitial_defect
Interference phenomenon of waves
Cole, Henderson (1 July 1964). "Dynamical Diffraction of X Rays by Perfect Crystals". Reviews of Modern Physics. 36 (3): 681–717. doi:10.1103/RevModPhys
Diffraction
Description of the dynamics of magnetization in a solid
of third order in the spin–orbit coupling parameter, diverges for a perfect crystal in the limit of zero temperature (vanishing scattering rate). Later
Landau–Lifshitz–Gilbert equation
Landau–Lifshitz–Gilbert_equation
Magnetic property of ordinary materials
2011. Kleiner, Kurt (10 August 2007). "Magnetic gravity trick grows perfect crystals". New Scientist. Archived from the original on 4 June 2011. Retrieved
Diamagnetism
Region of a magnetic material in which the magnetization has uniform direction
describes magnetic domain structure in a perfect crystal lattice, such as would be found in a single crystal of iron. However most magnetic materials
Magnetic_domain
Early radio receiver component
A crystal detector is an electronic component used in some early 20th century radio receivers. It consists of a piece of crystalline mineral that rectifies
Crystal_detector
Increase in the total entropy of a compound system after mixing
much the same. A pure crystal has no spatial uncertainty at all, except for crystallographic defects, and a (perfect) crystal allows us to localize the
Entropy_of_mixing
Mineral made of silicon and oxygen
discovered that, regardless of a quartz crystal's size or shape, its long prism faces always meet at a perfect 60° angle, thereby establishing the law
Quartz
Bending of electron beams due to electrostatic interactions with matter
Column Approximation (e.g. references and further reading). For a perfect crystal the intensity for each diffraction spot g {\displaystyle \mathbf {g}
Electron_diffraction
1632 book by Galileo Galilei
are used to show that the Moon's surface must be opaque and not a perfect crystal sphere as Simplicio believes. He refuses to accept that mountains on
Dialogue Concerning the Two Chief World Systems
Dialogue_Concerning_the_Two_Chief_World_Systems
American political scientist and analyst (born 1952)
Center for Politics is also responsible for the publication of Sabato's Crystal Ball, an online newsletter and website that provides free political analysis
Larry_Sabato
Plagioclase feldspar with 50–70% anorthite
to 1.573 and twinning is common. As with all plagioclase members, the crystal system is triclinic, and three directions of cleavage are present, two
Labradorite
Property of a thermodynamic system
value of the entropy, we consider the third law of thermodynamics: perfect crystals at the absolute zero have an entropy S = 0 {\textstyle S=0} . From
Entropy
Award in crystallography
Prize Mukhopadhyay, N. K. (2014). "The Tenth Ewald Prize and aperiodic crystals" (PDF). Current Science. 106 (6): 793. T. Blundell awarded the eleventh
Ewald_Prize
American drag performer
Crystal Methyd (born 16 April 1991) is the stage name of Cody D. Harness, an American drag performer who competed on the twelfth season of RuPaul's Drag
Crystal_Methyd
Material with a continuous, unbroken crystal lattice
inhomogeneous strain and crystallographic defects such as dislocations, perfect single crystals of meaningful size are exceedingly rare in nature. The necessary
Single_crystal
Mountain in the Swiss and Italian Alps
peak its present precipitous form: the Matterhorn was not like a perfected crystal; the centuries had laboured to destroy a great part of an ancient
Matterhorn
Law about the rate of chemical reactions
value of n o {\displaystyle n_{o}} and p o {\displaystyle p_{o}} in a perfect crystal. Note that the final product is independent of the Fermi level ( E
Law_of_mass_action
mechanical strengths on the order of the theoretical strength of an ideal, perfect crystal. While such effects are typically limited to individual, geometrically
Nanolattice
English media personality (born 2007)
Princess Tiaamii Crystal Andrea (born 29 June 2007), known professionally as Princess Andre, is an English media personality. The younger child of Katie
Princess_Andre
Phenomenon in crystallization
Crystal twinning occurs when two or more adjacent crystals of the same mineral are oriented so that they share some of the same crystal lattice points
Crystal_twinning
History of chemical crystallography to 1895
observation using a goniometer, a microscope, and reference to crystal classes, tables of crystal angles, axial ratios, and the ratio between molecular weight
Chemical crystallography before X-rays
Chemical_crystallography_before_X-rays
Lensless computational imaging method
a perfect crystal is symmetric so the inverse Fourier transform of that pattern is entirely real valued. The introduction of defects in the crystal leads
Coherent_diffraction_imaging
American singer-songwriter and actress (b. 1961)
Crystal Lynn Bernard (born September 30, 1961) is a retired American singer-songwriter and actress, best known for her roles as Helen Chappel-Hackett
Crystal_Bernard
2005 video game
TimeSplitters: Future Perfect is a 2005 first-person shooter video game developed by Free Radical Design and published by Electronic Arts for the GameCube
TimeSplitters:_Future_Perfect
Study of chemical reactions within the laws of thermodynamics
is always an increase in entropy of the universe. The entropy of a perfect crystal (well ordered) at 0 Kelvin is zero. Chemical energy is the energy that
Chemical_thermodynamics
Type of crystallographic defect
color centers is by additive coloring. A crystal with F centers is chemically equivalent as a perfect crystal plus stoichiometric excess of the alkali
F-center
Mineral species of the silicate group
as deformation of the medium or the chemical environment. Since a perfect crystal is considered an ordered, infinite stack of atoms, the layers contain
Cookeite
Topics referred to by the same term
for the Xbox 360 in 2010 Perfect Dark (cancelled video game), a video game formerly in development by The Initiative and Crystal Dynamics Joanna Dark, a
Perfect_Dark_(disambiguation)
Copper silicate hydroxide mineral
orthorhombic – dipyramidal crystal system and usually occurs in a granular massive form and also as fibrous acicular crystals. It is closely allied to plancheite
Shattuckite
tries to attack Kaitlyn and the others to get the shard of the last perfect crystal they are hiding, as he knows it will destroy Mr Zetes and his personal
Dark_Visions_Trilogy
Fictional protagonist of Monsters, Inc.
protagonists, alongside James P. Sullivan, and is primarily voiced by Billy Crystal in the film series, shorts, and the Disney+ series. In early versions of
Mike_Wazowski
State of matter with properties of both conventional liquids and crystals
Liquid crystal (LC) is a state of matter whose properties are between those of conventional liquids and those of solid crystals. There are many types of
Liquid_crystal
Group of phyllosilicate minerals
is that individual mica crystals can easily be split into fragile elastic plates. This characteristic is described as perfect basal cleavage. Mica is
Mica
Physical law for entropy and heat
law of thermodynamics, which states that S = 0 at absolute zero for perfect crystals. For any irreversible process, since entropy is a state function, we
Second_law_of_thermodynamics
Chemical compound
atomic layer. The crystal's lattice structures match up, resembling a perfect crystal, with corresponding luminosity. The crystal had indium content
Indium_gallium_nitride
Mineral composed of manganese oxide-hydroxide, MnO(OH)
3. There is a perfect cleavage parallel to the brachypinacoid, and less-perfect cleavage parallel to the prism faces. Twinned crystals are not infrequent
Manganite
Transparent variety of gypsum
'Moon'). Some of the largest crystals ever found are of selenite, the largest specimen found in the Naica Mine's Cave of the Crystals being 12 meters long and
Selenite_(gypsum)
PERFECT CRYSTAL
PERFECT CRYSTAL
Girl/Female
Spanish
Perfect.
Boy/Male
Tamil
Perfect
Girl/Female
Arabic
Perfect.
Girl/Female
Hindu, Indian, Japanese, Kannada, Malayalam, Marathi, Telugu
Perfect
Boy/Male
French
Perfect.
Boy/Male
Muslim
Perfect
Girl/Female
Tamil
Perfect
Surname or Lastname
French
French : from a pet form of the personal name P(i)erre, French form of Peter.English (Bristol) : variant of Parrott
Surname or Lastname
English
English : variant of Parfitt.
Girl/Female
Hindu, Indian, Marathi, Tamil, Telugu
Perfect
Girl/Female
Tamil
Nicika | நீஸீகா  Â
Perfect
Nicika | நீஸீகா  Â
Girl/Female
Indian, Telugu
Perfect
Boy/Male
Hindu
Perfect
Girl/Female
Tamil
Surasti | ஸà¯à®°à®¸à¯à®¤à¯€
Perfect
Surasti | ஸà¯à®°à®¸à¯à®¤à¯€
Girl/Female
Arabic, Muslim, Pakistani
Perfect
Boy/Male
Tamil
Perfect
Girl/Female
Assamese, Hindu, Indian, Kannada, Malayalam, Marathi, Telugu
Perfect
Surname or Lastname
English (Bristol)
English (Bristol) : variant of Parrott 1.
Girl/Female
Hindu
Perfect
Boy/Male
Muslim
Perfect
PERFECT CRYSTAL
PERFECT CRYSTAL
Boy/Male
Indian, Sanskrit
Burning Charcoal
Girl/Female
Tamil
Snithika | ஸà¯à®¨à¯€à®¤à¯€à®•à®¾Â Â
Girl/Female
Tamil
Anandmayee | ஆநஂதமயீ
Full of Joy, Full of happiness
Girl/Female
Hindu, Indian
Friend
Surname or Lastname
English
English : habitational name from the cathedral city on an island in the fens north of Cambridge. It is so named from Old English ǣl ‘eel’ + gē ‘district’.Probably also an Americanized form of German Eley.Nathaniel Ely was one of the founders of Hartford, CT, (coming from Cambridge, MA, with Thomas Hooker) in 1635.
Boy/Male
Arabic, Muslim
Unique (Manifestation) of the Religion Islam
Girl/Female
Hindu, Indian, Tamil
The Earth; Wife of Lord Shiva
Girl/Female
Tamil
Vijayashanthi | விஜயாஷாநதீÂ
Victory
Boy/Male
Tamil
Rohitaksh | ரோஹீதாகà¯à®·
Eyes of Lord Vishnu
Boy/Male
Irish
Swarthy.
PERFECT CRYSTAL
PERFECT CRYSTAL
PERFECT CRYSTAL
PERFECT CRYSTAL
PERFECT CRYSTAL
a.
Perfect.
a.
Hermaphrodite; having both stamens and pistils; -- said of flower.
imp. & p. p.
of Perfect
n.
A Roman officer who controlled or superintended a particular command, charge, department, etc.; as, the prefect of the aqueducts; the prefect of a camp, of a fleet, of the city guard, of provisions; the pretorian prefect, who was commander of the troops guarding the emperor's person.
adv.
In a perfect manner or degree; in or to perfection; completely; wholly; throughly; faultlessly.
v. t.
To make imperfect.
n.
The imperfect tense; or the form of a verb denoting the imperfect tense.
a.
Producing mathematically perfect harmony or concord; sweetly or perfectly harmonious.
n.
One who, or that which, makes perfect.
a.
Brought to consummation or completeness; completed; not defective nor redundant; having all the properties or qualities requisite to its nature and kind; without flaw, fault, or blemish; without error; mature; whole; pure; sound; right; correct.
a.
To make perfect; to finish or complete, so as to leave nothing wanting; to give to anything all that is requisite to its nature and kind.
n.
Failing; fault; imperfection, whether physical or moral; blemish; as, a defect in the ear or eye; a defect in timber or iron; a defect of memory or judgment.
a.
Liable to defect; imperfect.
n.
The perfect tense, or a form in that tense.
n.
Power to produce results; efficiency; force; importance; account; as, to speak with effect.
n.
Execution; performance; realization; operation; as, the law goes into effect in May.
a.
Not perfect; not complete in all its parts; wanting a part; deective; deficient.
a.
Well informed; certain; sure.
a.
Imperfect.
a.
Perfect.