- In geometry, a
triakis octahedron (or
trigonal trisoctahedron or kisoctahedron) is an
Archimedean dual solid, or a
Catalan solid. Its dual is the truncated...
-
trapezoidal icositetrahedron,
tetragonal icosikaitetrahedron,
tetragonal trisoctahedron,
strombic icositetrahedron) is a
Catalan solid. Its 24
faces are congruent...
- pyritohedron, rhombohedron, sanhedrin, synedrion, tetrahedroid, trapezohedron,
trisoctahedron hed- pleasant,
sweet Gr**** ἥδεσθαι, ἡδόμενον, ἡδύς (hēdómenon, hēdús)...
- pyritohedron, rhombohedron, sanhedrin, synedrion, tetrahedroid, trapezohedron,
trisoctahedron hed- pleasant,
sweet Gr**** ἥδεσθαι, ἡδόμενον, ἡδύς (hēdómenon, hēdús)...
-
forms exhibited by sperrylite,
including four
different trapezohedra, a
trisoctahedron, five pyritohedra, and four diploids.
Crystals to 2.5 cm have been reported...
-
about 30 carats, in the
shape of a pyramid, octahedron, or
regular trisoctahedron. As
there is
little evidence for
diamond cutting before 1400, it is...