Crystallography: statements about unit cells Evaluate standard statements about unit cells (crystal lattices) and choose the most comprehensive correct option. Which is correct?

ConceptA unit cell is the smallest repeating building block of a crystal lattice. All unit cells in a given single crystal share the same orientation and parallelism of corresponding faces; repeating the unit cell along lattice vectors reconstructs the entire lattice.

Why all true

• (a) Captures the representative nature of the unit cell.
• (b) Unit cells in a single crystal are identically oriented; similar faces are parallel.
• (c) The formal definition: a smallest parallelepiped (the unit cell) that, by translation along three non-coplanar vectors, fills space.

Final AnswerAll of the above