crystal structures unit- 1

    Master this deck with 18 terms through effective study methods.

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    What defines a crystalline solid?

    Atoms are arranged in a repeating three-dimensional pattern.

    How does a single crystal differ from a polycrystalline material?

    A single crystal has a uniform atomic structure throughout, while polycrystalline consists of many small crystals.

    What characterizes an amorphous solid?

    Lacks a long-range ordered structure.

    What happens during the solidification of a crystalline material?

    Solidification occurs gradually, allowing for a structured arrangement.

    What is a key feature of translational symmetry in crystals?

    Equivalent atoms are related by consistent spatial translations.

    What distinguishes a single crystal from an amorphous solid?

    Single crystals have periodic atomic arrangements, while amorphous solids do not.

    What is the implication of a crystal's atomic arrangement?

    It affects the material's properties, such as strength and conductivity.

    What defines a polycrystal?

    It consists of many small single crystals called grains.

    What is the size range of grains in a polycrystal?

    Typically between 100 nm and 100 microns in diameter.

    What are nano-crystalline materials?

    Polycrystals with grains smaller than 10 nm.

    How do grain boundaries affect polycrystals?

    They separate differently oriented crystals within the material.

    What distinguishes an amorphous solid from a crystalline solid?

    Amorphous solids lack defined patterns or lattice structures.

    What is a crystal?

    A solid with a three-dimensional periodic arrangement of atoms.

    What is meant by crystal structure?

    The periodic array of atoms, ions, or molecules in solids.

    What is a lattice in crystallography?

    A regular arrangement of points representing atomic positions.

    What is a unit cell?

    The smallest repeating unit that defines the crystal structure.

    What does the atomic packing factor (APF) indicate?

    The efficiency of space utilization in a crystal structure.

    What is the significance of the coordination number?

    It indicates the number of nearest neighbors surrounding an atom.