Image: Crystal group 5: Trigonal - Trapezohedron

Crystal group 5: Trigonal - Trapezohedron

Crystal group 5: Trigonal - Trapezohedron

Creator:
Australian Museum Design Unit
Rights:
© Australian Museum

Notes

Trigonal (rhombohedral): Sometimes included in Hexagonal. The horizontal (a) and (b) axes are of equal length but the angles between the axes are different. There is a three-fold rotation axis.

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Tags crystallography, crystal groups, crystal shapes, minerals, geology,