[Wien] How to supercell for nanocrystalline La0.8Sr0.2Mn0.8Fe0.2

[vinit sharma]

Dear Wien users,
I have the lattice parameter of perovskite sample determined from HPXRD measurements. The sample is nanocrystalline La0.8Sr0.2Mn0.8Fe0.2

Pressure	a		b		c	volume 
Ambient	      3.896	      5.4886	      7.795	166.685
3.8GPa        3.868 	      5.4388	      7.823	164.585
8.4GPa 	      3.861	      5.3886	      7.879 	163.945
10.8GPa       3.851 	      5.3854 	      7.883 	163.506
Unit is in Angstrom.

My problem is how to choose supercells in Wien2K package.

Please help.

With kind regards
Vinit Sharma
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