trapezohedron

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July 14, 2026

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A trapezohedron is a crystalline form characterized by faces that are trapeziums. The term "trapezohedron" originates from New Latin and was first used around 1822. Related forms include "trapezohedral," meaning of, relating to, or resembling a trapezohedron. A trigonal trapezohedron is a specific type of trapezohedron. A tristetrahedron is a solid with 12 triangular faces that is related to the trapezohedron.1234

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form
…face is a scalene triangle;Trapezohedron: 6-, 8-, 12-, or 24-faced closed form in which half the faces are offset above the other half; in well-developed crystals, each face is a trapezium;Dipyramid: 6-, 8-, 12-, 16-, or 24-faced closed form in which the lower pyramid is a reflection of…
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…face is a scalene triangle;Trapezohedron: 6-, 8-, 12-, or 24-faced closed form in which half the faces are offset above the other half; in well-developed crystals, each face is a trapezium;Dipyramid: 6-, 8-, 12-, 16-, or 24-faced closed form in which the lower pyramid is a reflection of…
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garnet
Crystal structure
called dodecahedrons (see photograph) and trapezohedrons (see photograph), respectively, or they are combinations of such forms (see photograph). All tend to be nearly equant. A few studies have led to the suggestion that these crystal habits can be correlated with chemical composition—i.e., that dodecahedrons are most likely to be grossular-rich;…
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called dodecahedrons (see photograph) and trapezohedrons (see photograph), respectively, or they are combinations of such forms (see photograph). All tend to be nearly equant. A few studies have led to the suggestion that these crystal habits can be correlated with chemical composition—i.e., that dodecahedrons are most likely to be grossular-rich;…
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