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Cubic

all sides the same and all right angles.

Tetragonal

square on two ends and the other sides have rectangles. Tetra means four, and four of the faces are the same. All right angles.

Orthorhombic

Ortho means right angles. Orthodontists put teeth at right angles. All rectangles. No squares.

Triclinic

All three pairs of faces are parallelograms.

Hexagonal

One pair of faces are hexagonal, the others are rectangles.

Rhombohedral

Rhombus is a diamond. All the sides are the same. The angles are not square.

Monoclinic

Angles are not square. Parallelogram on pair of faces, other sides rectangles. One pair of parallelograms. In picture back and front are parallelograms.

Cubic Unit Cell

8 atoms arranged in nice unit cells.

Face-Centered unit cell

A cubic unit cell with an atom in the middle of each face. Picture dice with a one on each side.

Body Centered Unit Cell

One atom in the center of the cube.

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