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Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

Contributors

Feedback

Unit Cells

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What is a unit cell in crystallography?

a: The smallest repeating unit that can build up the entire crystal lattice through translation. Explanation

Explanation

b: A single atom within a crystal. Explanation

Explanation

c: A defect in the crystal structure. Explanation

Explanation

d: The outermost layer of a crystal. Explanation

Explanation

Which of the following is a characteristic of a primitive unit cell?

a: Contains more than one lattice point. Explanation

Explanation

b: Contains only one lattice point. Explanation

Explanation

c: Has atoms only at the center. Explanation

Explanation

d: Is always cubic in shape. Explanation

Explanation

How many types of Bravais lattices are there in three-dimensional space?

a: 7 Explanation

Explanation

b: 14 Explanation

Explanation

c: 28 Explanation

Explanation

d: 4 Explanation

Explanation

In a face-centered cubic (FCC) lattice, how many atoms are effectively contained within one unit cell?

a: 1 Explanation

Explanation

b: 2 Explanation

Explanation

c: 4 Explanation

Explanation

d: 8 Explanation

Explanation

Which of the following crystal systems has all sides equal and all angles equal to 90 degrees?

a: Tetragonal Explanation

Explanation

b: Orthorhombic Explanation

Explanation

c: Cubic Explanation

Explanation

d: Monoclinic Explanation

Explanation

What distinguishes a non-primitive unit cell from a primitive one?

a: Non-primitive unit cells have additional lattice points within the cell, not just at the vertices. Explanation

Explanation

b: Non-primitive unit cells are smaller than primitive unit cells. Explanation

Explanation

c: Non-primitive unit cells lack translational symmetry. Explanation

Explanation

d: Non-primitive unit cells are always hexagonal. Explanation

Explanation

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