• View
• Edit
• History
• Print

Individual Orientations From MAUD

Generating individual orientations from MAUD textures

In MAUD, textures can be exported in a maa format that can then be read with other software. The maa format is fairly straightforward. The file starts as follow

My comment
7 5.0
3.4086185 3.4086185 3.4086185 90 90 90 
1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 

The first line is a comment. The second line includes an integer, defining crystal symmetry, and a floating point number, defining the ODF resolution (5° in the above example). The third line are the sample cell parameters. Later lines are the ODF coefficients. MAUD uses Matthies Euler angles, α, β, γ. The file is a collection of ODF coefficients. If your ODF resolution is 5°, they are listed as follow:

• The first 19 lines block corresponds to γ = 0°.
  • The first line in the block is is for β = 0°. There are 73 values, for α = 0°, 5°, 10°, ..., 360°
  • The second line in the block is for for β = 5°.
  • Line number 19 is for β = 90°.
• The second 19 lines block is for γ = 5°.
• etc.

Load the ODF in Beartex

You can load this file in Beartex and convert it to a Beartex ODF in binary format. You can then use the typical Beartex functions for smoothing, plooting pole figures, re-exporting the data, etc.

Load the ODF in Pole8

In some cases, I prefer to load the ODF in Pole8 and generate a collection of individual orientations that match the experimental textures. To do so, you need to add 2 lines at the beginning of the maa file. The first line is for comments. The second line starts with the string Lutteroti. What is important is that the letter L is the fourth letter in the line. This is what pole8 looks for. There is no change afterward. The modified maa file will looks like this

    Lutteroti --> first letter of this line is read with format (4x,a)
My comment
7 5.0
3.4086185 3.4086185 3.4086185 90 90 90 
1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 1.6811637 

You can then load this file in pole8, with the regular plotting options, by choosing "-1" in the pole8 input file to force it to read an ODF.