Crystal Lattices and Unit Cell
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Questions and Answers

What is the main characteristic of crystalline solids?

  • Regular and repeating pattern of constituent particles (correct)
  • Absence of crystal lattices
  • Irregular pattern of constituent particles
  • Random distribution of particles in space
  • How many possible 3D lattices are there called Bravis Lattices?

  • 14 (correct)
  • 7
  • 28
  • 21
  • What is each point in the crystal lattice called?

  • Lattice point/lattice site (correct)
  • Nucleus
  • Vertex
  • Node
  • Which type of unit cell contains constituent particles only at the corner positions?

    <p>Primitive unit cell</p> Signup and view all the answers

    What is the smallest portion of a crystal lattice that generates the entire lattice when repeated in different directions?

    <p>Unit Cell</p> Signup and view all the answers

    In a face-centered unit cell, where are the constituent particles located?

    <p>At the center of each face</p> Signup and view all the answers

    What angles characterize a unit cell?

    <p>$\alpha$, $\beta$, and $\gamma$</p> Signup and view all the answers

    What type of unit cell has one constituent particle at the center of each face?

    <p>Face-centered unit cell</p> Signup and view all the answers

    How are lattice points connected?

    <p>By lines</p> Signup and view all the answers

    Study Notes

    Crystalline Solids

    • The main characteristic of crystalline solids is their three-dimensional arrangement of particles in a regular and periodic pattern.

    Bravais Lattices

    • There are 14 possible 3D lattices, known as Bravais Lattices.

    Crystal Lattice

    • Each point in the crystal lattice is called a lattice point.

    Unit Cells

    • A primitive unit cell contains constituent particles only at the corner positions.
    • The smallest portion of a crystal lattice that generates the entire lattice when repeated in different directions is called a unit cell.

    Face-Centered Unit Cell

    • In a face-centered unit cell, the constituent particles are located at the center of each face in addition to the corners.

    Unit Cell Angles

    • A unit cell is characterized by three axes (a, b, and c) and three angles (α, β, and γ) between them.

    Unit Cell Types

    • A face-centered unit cell has one constituent particle at the center of each face.

    Lattice Points

    • Lattice points are connected in a three-dimensional pattern to form a crystal lattice.

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    Description

    Discover the main characteristics of crystalline solids, including the regular and repeating pattern of constituent particles and the concept of crystal lattices. Learn about the 14 possible 3D lattices known as Bravis Lattices and the characteristics of crystal lattice points.

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