Cubic crystal system has the following unit cell dimensions:
Correct answer: A. a=b=c and α=β=γ=90°
- A. a=b=c and α=β=γ=90°
- B. a = b ≠ c and α = β = γ = 90°
- C. a ≠ b ≠ c and α = β = γ = 90°
- D. a=b≠c and α=β=90° γ=120°
Explanation
Option Ais correct.The correct answer is a=b=c and α=β=γ=90°.The cubic crystal system is one of the seven crystal systems.It is characterized by having all three axes equal in length and all angles between the axes equal to 90°.This means that the crystal is symmetrical about three axes,and the atoms in the crystal are arranged in a cubic pattern Examples: Fe, Cu, Ag. Au, NaCl, NaBr, Diamond
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A crystal lattice is the regular three-dimensional arrangement of particles in a crystalline solid. The content includes lattice points, unit cells, coordination number, packing patterns, and the differences among ionic, metallic, molecular and covalent network crystals, which should not be confused with amorphous solids.
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