The unit cell of theα-zirconium crystal structure is ahexagonal prism. The top and bottom faces are calledbasal planesand the six sides are termedprism planes. Mechanical properties such as yieldstrengthand atomic properties such as self-diffusivity differ significantly in thedirections perpendicularto...
The corner connection for the hexagonal cell curtain wall is adaptable to the outer corner formed by the unit frames, the unit frames is fixedly connected from three different directions, so that fixing effect is better.高大永孙海华
There are two atoms in the unit cell and the basal planes are stacked in ababa… sequence (as compared to the abcabca… stacking sequence of the {111} planes in f.c.c. crystals). Different 3-index crystal bases have been used to describe the directions and planes in the h.c.p. ...
While a number of crystals in the NiAs-Ni 2 In family have been reported with this special axial ratio, the number of atoms in the unit cell is small. As the first example of an intermetallic cluster compound, we identify -Al 4 Mn, -Al 4 Cr, Zn-Mg-Sm and a host of related ...
PERFECT MATCH1NGS IN HEXAGONAL SYSTEMS 1984年组合杂志
unit cell would involve displacement or shuffle of atoms that are out of the habit plane, in a direction perpendicular to the habit plane. Therefore, the latter distortion is more dependent on the stress-state. This anisotropic distortion makes c/a ratio sensitive to stress-state and ΔV ...
As experimentally demonstrated, the grown ZnO films on the MgO (001) substrates can exhibit either polar c- or non-polar m-directions depending on the growth conditions. The growth direction of the film was robust and exhibited a transition after nucleating, which can be demonstrated by in-situ...
We note also an anisotropic expansion of the unit cell parameters; the c parameter increases more strongly (2.7%) than the a parameter (1.6%). This can be explained considering that the crystal structure of Gd6Co1.67Si3 (Fig. 5) is described by a stacking of trigonal prisms [Gd6] ...
Draw a cph structure cell and label the (0 0 0 1), (11¯00) and (21¯1¯1) planes. Mark in the ⟨112¯0⟩ and ⟨101¯0⟩ directions. Magnesium has almost ideal c/a and has a density 1.74 Mgm−3 and relative atomic mass 24.31. Calculate the values of c and ...
This type of plane is thus called a close-packed plane, and contains three close-packed directions; they are the directions along which the balls touch. The figure shows only a small region of close-packed plane—if we had more reds we could extend the plane sideways and could, if we ...