Question

Give one example of each – Tetragonal and hexagonal crystal system.​

Answer 1

The hexagonal crystal system consists of the 7 point groups that have a single six-fold rotation axis. These 7 point groups have 27 space groups (168 to 194), all of which are assigned to the hexagonal lattice system. Graphite is an example of a crystal that crystallizes in the hexagonal crystal system.

Common Tetragonal Crystals:

Anatase. Apophyllite. Chalcopyrite.

Rutile. Scapolite. Scheelite.

Wulfenite. Zircon.

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