Hello,

there is a little program called "scan_ibrav.x" in the QE distribution. Run it interactiveluy and give it your ibrav=0 structure and it'll find oit the correct valeus for ibrav=6 (if it is possible). It will also warn you if there is a rotation or a change of axis order involved, which you may have to fix by hand.

hth

On 14/03/2026 09:38, Narayanan Namboodiri P via users wrote:
Dear users,


             I am using QE to run my calculation. I ran the calculation initially with ibrav = 0 and system converged properly. But for the same value, if I used ibrav = 6, as my system is tetragonal the calculation is not converging. Can any body suggets what may be the reason for this.

/
&SYSTEM
    ibrav=  6,
    celldm(1) = 7.3510633312,
    celldm(3) = 2.4481070291,
Thanking you in advance

with regards

Narayanan.

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