 Cubic
The cubic structure is characterized by three equal axis  a,b and c. This structure provides a cubic shape with all sides sides having the same dimensions.

 Tetragonal
The tetragonal structure is characterized by two equal axis  b and c with a being a different length.With all angles at 90 degrees, this structure provides an elongated cubic shape with the end view being square and the side views being rectangular.

 Hexagonal
The hexagonal structure is characterized by three equal axis  a, b and c with e being a different length.With all angles between a,b and c at 60 degrees to each other and 90 degrees to e, this structure provides an elongated, or shortned hexagonal form with flatened ends.

 Trigonal
The trigonal structure is characterized by three equal axis  a, b and c with e being a different length.With all angles at 60 degrees, this structure provides an elongated or shortned hexagonal shape from any side, and a perfect hexagonal shape from the end.

 Orthorhombic
The orthorhombic structure is characterized by no equal axis  all three are a different length.With all angles at 90 degrees, this structure provides a rectangular shaped structure from any direction.

 Monoclinic
The monoclinic structure is characterized by no equal axis  all three are a different length.With one angle at 90 degrees, this structure provides a rectangular shaped structure with a wedge shape end.

 Triclinic
The triclinic structure is characterized by no equal axis  all three are a different length.With no angle at 90 degrees, this structure provides an irregular shaped structure with no square corners. 