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This article explores various crystal structures, including the disphenoid, dipyramid, and hexagonal pyramid. We delve into the unique characteristics of the tetragonal dipyramid and dihexagonal pyramid, as well as their geometric relationships on a mirror plane. The tetrahedron's distinctive faces, including the 111 and 123 arrangements, are also discussed, providing insights into their symmetrical properties. Suitable for students and enthusiasts of mineralogy and crystallography, this piece aims to enhance understanding of complex geometric forms in crystallography.
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