crystallographic axis

crystallographic axis

[¦kris·tə·lō¦graf·ik ′ak·səs]
(crystallography)
One of three lines (sometimes four, in the case of a hexagonal crystal), passing through a common point, that are chosen to have definite relation to the symmetry properties of a crystal, and are used as a reference in describing crystal symmetry and structure.
References in periodicals archive ?
According to SEM analysis, preferential growth along particular crystallographic axis improved as shown in figure 3.
2] [PHI]) is the average value of the cosine squared of the angle ([PHI]) between the film machine direction and a crystallographic axis.
Quite accurately this observer noted that the composite stacks of crystals had grown up from matrix along the perpendicular crystallographic axis a and collectively appeared rotated, or twisted, about that axis, the crystals' long axes c all being tilted regularly either to the right or the left.
If two components are equal to zero, the elongation leads in the direction of only one crystallographic axis.
For the case of complete parallel alignment of crystallographic axis with the fiber, [[phi].
i,j] was the mean square cosine of j pseudo-orthorhombic crystallographic axis with respect to i principal stretch direction.
The degree of biaxial orientation of a specified crystallographic axis was quantified with pole figure data by calculating White and Spruiell (26) biaxial orientation factors: