
First attempt: standard minimizations without pressure.

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Second attempt: standard minimization without pressure.

 We have started from the basis set optimized in the previous step.
 However, the second-zeta of the K 4s has been reduced a little bit
 by hand to avoid the WARNING of a too small Split Norm.

 We have also removed the use of the GridCellSampling


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Third attempt: Introduce a pressure of 0.03 GPa

Starting from the optimized basis set number 2, 
we perform an optimization of the enthalpy with a 
pressure of 0.03 GPa. 

The goal is to reduce the range of the atomic orbitals
(some of them where too long).

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Fourth attempt: Second optimization with a pressure of 0.03 GPa

Second optimization with pressure starting from the previous
minimum

Customary changes in the displacements of the initial simplex 
for running the code within the imposed constraints. 

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Fifth attempt: Third optimization with a pressure of 0.03 GPa
starting from the optimized basis of the fourth attempt.

To avoid the kink that appeared in the second-zeta of the 4s orbital of K,
we have increased the minimum allowed cutoff radius up to 3.5 bohrs.

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Sixth attempt: Fourth optimization with a pressure of 0.03 GPa
starting from the optimized basis of the fourth attempt.

To avoid the WARNING message for a too low SplitNorm in the 4s of K.
we have increased the tolerance factor to 2.0 bohrs, together with
the minimum (and initial) value for the first zeta of the 4s orbital.

We have also increased the tolerance between the inner radius of the
soft confinement potential and the first-zeta radius of the 4p channel of K
to avoid an execution error. The initial value of the inner radius for the
4p has been changed accordingly.


