crystal allows to display crystal projection on a plane and draw dichromatic patterns.
The interface is composed of a top bar menu, a plotting area to display the projection and a setting panel.
Enter the Crystal Parameters, either from the input fields or from the structure menu
Planefield and the
Sizeof the crystal box (integer units of the lattice parameters).
Enter the layers indices (
Layers numb.) parallel to the projected plane according to the scheme n_0,n_1, n being the layer number.
Calculatebutton. You will be prompted to select the appropriate crystal structure. Text files such as
cfc.txtdescribe the position of atoms in the unit cell. The format is:
atom1 x1 y1 z1 ... atomn xn yn zn v1x v1y v1z ... vkx vky vkz
atomn is nth atom in the cell at coordinate
xn, yn, zn and
vkx,vky,vkz is the kth translation vector defining all the positions of atoms in the cell.
Atom typebutton to see the different atoms (label with different numbers)
Atom positionbutton to see the coordinates
Projection of 3 layers of the (1,1,1) plane in an Al crystal
Marker sizeand shape using the
Zoom in, move and save the figure using the tool bar
A so-called dichromatic pattern is formed when two misoriented crystals are interpenetrated. The pattern is drawn according the usual convention: black and white crystals correspond to two different grains and different symbols to different layers (note that you can plot up to 7 different layers with different symbols).
To draw it tick the
Enter a rotation
anglebetween the two crystal along the plane normal.
Calculate) and then
coincidencebox to highlight coincident site positions. The precision by which is defined coincidence can be tuned in the
precisionfield. It is expressed in % of the largest lattice parameter.
layersbutton to show the layer number on the dichromatic pattern. From layers 0 to 5, markers are circles, squares, triangles, stars and hexagons, respectively. After they are all circles.
Example of a dichromatic pattern in a (1,1,1) plane with a misorientation angle of 38.21°, in Al.