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trigonal's Usage Examples:

crystallography, the hexagonal crystal family is one of the six crystal families, which includes two crystal systems (hexagonal and trigonal) and two.

It can be seen as a truncated trigonal hosohedron, represented by Schläfli symbol t{2,3}.

honeycomb with each rhombic dodecahedron dissected into 4 trigonal trapezohedrons.

In geometry, a trigonal trapezohedron is a rhombohedron (a three-dimensional polyhedron with six rhombus-shaped faces) in which, additionally, all six.

neither attacked by another parasitoid or fed to a vespid, the trigonalid larva fails to develop.

In geometry, a triakis octahedron (or trigonal trisoctahedron or kisoctahedron) is an Archimedean dual solid, or a Catalan solid.

same as five of the lattice systems, but the hexagonal and trigonal crystal systems differ from the hexagonal and rhombohedral lattice systems.

pairs of triangles merged into rhombi, it can be seen as a trigonal trapezohedron.

While commonly confused, the trigonal crystal system and the rhombohedral lattice system are not equivalent.

It crystallizes in the trigonal - rhombohedral crystal system.

P3121, P3212, P3221 R32 156–161 Ditrigonal pyramidal 3m C3v *33 [3] polar schorl, cerite, tourmaline, alunite, lithium tantalate P3m1, P31m, P3c1, P31c R3m.

Preparation and structureFeS can be obtained by the heating of iron and sulfur:Fe + S → FeSFeS adopts the nickel arsenide structure, featuring octahedral Fe centers and trigonal prismatic sulfide sites.

Both of these mechanism product complexes wherein the ligating atoms (X in the scheme) are arranged in an approximate trigonal prism.

Synonyms:

symmetric, symmetrical, rhombohedral,

Antonyms:

asymmetrical, oblique, irregular, perpendicular,