| 11. | Geigerite s crystal system is triclinic with perfect cleavage on the { 010 }.
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| 12. | It crystallizes in the triclinic hardness of 3.
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| 13. | All minerals of the monoclinic, orthorhombic, and triclinic systems are biaxial minerals.
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| 14. | Amarantite is triclinic, which means crystallographically, it has only one symmetry fold.
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| 15. | Being triclinic, ulexite is optically biaxial.
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| 16. | The dihydrate one has a triclinic structure, while the trihydrate has a monoclinic structure.
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| 17. | The triclinic lattice is the least symmetric of the 14 three-dimensional Bravais lattices.
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| 18. | It crystallizes in the triclinic crystal system.
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| 19. | Amesite crystallizes in the triclinic crystal system.
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| 20. | Monoclinic and triclinic examples are certain to exist, but have proven hard to parametrise.
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