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Unit-cell Polytypes

Minerals having different symmetry systems by different unit-cell length in a direction.

Suffix (Italic)

Unit cell (Unit-cell structure): -1a

Double a axis unite cell: -2a

A list of minerals showing unit-cell polytypism

• Baumhauerite: -1a (Baumhauerite), -2a (Baumhauerite-2a)
• Kintoreite: -1c (Kintoreite), -2c
• Natroalunite: -1c (Natroalunite), -2c (Natroalunite-2c)
• Veatchite: -p (Veatchite-p), -1M (High temperature), -2M (High pressure), -1A (Veatchite-A, Low temperature, Low pressure)