tetragonal

/te-trag-uh-nl/US // tɛˈtræg ə nl //UK // (tɛˈtræɡənəl) //

四角形,四角形的,四边形,四边形的

Definitions

adj.形容词 adjective

1
- : pertaining to or having the form of a tetragon.
- : Crystallography. noting or pertaining to a system of crystallization in which all three axes are at right angles to one another, two being equal in length and the third being of a different length.

In the tetragonal system there are three axes at right angles to each other.
Though closely resembling the tetragonal torbernite in form, it crystallizes in the orthorhombic system and is optically biaxial.
Direct nitration gives (principally) m-nitrobenzoic acid, also pseudo-tetragonal with a much shorter principal axis.
Benzoic acid is pseudo-tetragonal, the principal axis being remarkably long; there is no cleavage at right angles to this axis.
The density and specific heat of the tetragonal form are greater than those of the yellow.