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Bonbo
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MATERIALS SCIENCE
Crystallography
Grain Boundary
Grain boundaries act as both protectors and weak points in metals, shaping their strength and durability
15 hours ago
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How do grain boundaries influence the mechanical strength and corrosion resistance of polycrystalline materials?
Grain boundaries improve electrical conductivity and prevent corrosion entirely.
Grain boundaries have no significant effect on material properties and are merely structural defects.
Grain boundaries block dislocation motion, increasing strength, but also serve as sites for corrosion initiation.
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JOHN_BASH
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PHYSICS
Crystallography
Tetragonal Lattice
Stretching a cube reshapes crystals and unlocks new material properties
27 hours ago
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What is the primary geometric change that defines a tetragonal lattice compared to a cubic lattice?
All edges remain equal but the angles between them change.
One lattice vector is stretched, making the height different from the base edges.
The lattice becomes completely irregular with no symmetry.
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PHYSICS
Crystallography
Crystal Lattice
Atomic forces clash to create the perfect repeating patterns in crystals
2 days ago
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How do competing atomic forces influence the formation of different crystal lattice types?
They balance energy minimization and spatial packing to determine lattice symmetry and properties.
They randomly arrange atoms without any influence on lattice type.
They only affect the color of the crystal, not its lattice structure.
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Bb115
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CHEMISTRY
Crystallography
Crystal Growth
Crystal growth reveals nature's precise atomic choreography shaping stunning forms
3 days ago
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What is the primary factor that determines the specific geometric shape of a growing crystal?
Random accumulation of atoms without any specific pattern
The color of the solution from which the crystal grows
The ordered addition of atoms or ions to the crystal lattice following its internal symmetry
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SteveO1
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PHYSICS
Crystallography
Crystal Structure
Atomic forces and geometric rules clash to shape the hidden order of crystals
4 days ago
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What primarily determines the formation of a crystal's structure?
Random placement of atoms without any repeating pattern
The intrinsic nature of atoms combined with spatial symmetry constraints
Only external environmental factors like temperature dictate crystal structure
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JOHN_BASH
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PHYSICS
Crystallography
Crystal Lattice
Symmetry in crystal lattices shapes the properties of everyday materials
5 days ago
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How does the symmetry of a crystal lattice influence the physical properties of a material?
Symmetry only affects the color of the material, not its physical properties.
Symmetry determines how atoms are arranged, affecting properties like hardness and conductivity.
Symmetry in crystal lattices is random and does not influence material behavior.
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PHYSICS
Crystallography
X-ray Diffraction
Invisible atomic patterns revealed by scattered X-rays unlock material secrets
6 days ago
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What is the primary cause of the diffraction pattern observed in X-ray diffraction experiments?
Absorption of X-rays by atomic nuclei
Inelastic scattering causing energy loss in X-rays
Elastic scattering of X-rays by electrons around atoms
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JOHN_BASH
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PHYSICS
Crystallography
Bragg's Law
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Atomic secrets unveiled by waves bouncing at just the right angle
9 days ago
Bragg's law reveals a stunningly precise relationship that governs how waves scatter off crystal lattices, unlocking the secrets of atomic structures with remarkable clarity. When waves like X-rays hit a crystal, they bounce off the...
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SCIENCE
Physics and Chemistry
Crystallography
Crystallography reveals the hidden atomic architecture shaping our world’s materials
9 days ago
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Why is crystallography essential for understanding material properties?
Because it only studies the external shapes of crystals without atomic detail
Because it reveals the atomic arrangement that determines a material's characteristics
Because it focuses solely on gemstones and decorative crystals
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PHYSICS
Crystallography
Bragg's Law
The law that cracked open the atomic world by decoding wave reflections in crystals
10 Feb 2026
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What key relationship does Bragg's law establish in the scattering of waves by crystal lattices?
It relates the wavelength, lattice spacing, and scattering angle for constructive interference.
It predicts the absorption rates of waves passing through crystals.
It states that waves scatter randomly without any specific angle dependence.
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Feefo
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PHYSICS
Crystallography
Quasicrystals
Quasicrystals defy classical rules with forbidden symmetries in atomic order
8 Feb 2026
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What key feature distinguishes quasicrystals from traditional crystals in terms of atomic arrangement?
They have ordered structures without periodic repetition and exhibit forbidden rotational symmetries.
They have completely random atomic arrangements without any order.
They are periodic crystals with only allowed rotational symmetries like six-fold.
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PHYSICS
Crystallography
Single Crystal X-ray Diffraction
Single crystal X-ray diffraction can reveal atomic structures invisible to any microscope
6 Feb 2026
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What is the primary reason single crystal X-ray diffraction can determine atomic arrangements within crystals?
Because X-rays are absorbed by atoms, revealing their positions through energy loss
Because X-rays pass straight through crystals without interaction, allowing direct imaging of atoms
Because X-rays elastically scatter off electrons in a crystal, producing a diffraction pattern that encodes atomic positions
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SCIENCE
Crystallography
Orthorhombic Crystal System
Orthorhombic crystals form rectangular prisms with three unequal, perpendicular axes
2 Feb 2026
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How does the orthorhombic crystal system differ from the cubic crystal system in terms of lattice parameters?
The orthorhombic system has axes intersecting at angles other than 90°, unlike the cubic system.
The orthorhombic system has three mutually perpendicular axes of different lengths, while the cubic system has three equal-length axes at right angles.
The orthorhombic system has equal-length axes but with non-perpendicular angles, unlike the cubic system.
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