View source for Vdw r0 ref

<code>[[vdw_r0_ref]]</code> sets the reference atomic vdW radius <math>r_0</math> for the [[van der Waals corrections#Tkatchenk-Scheffler method|Tkatchenko-Scheffler]] van der Waals correction method.

=== Summary ===

{| class="wikitable"
|+ Summary for <code>vdw_r0_ref</code> keyword
! style="text-align:left;"| Required/optional
! style="text-align:left;"| Type
! style="text-align:left;"| Accepted values
! style="text-align:left;"| Default
! style="text-align:left;"| See also
|-
| Optional if '''TurboGAP''' knows the defaults for the given [[species]], mandatory otherwise
| Real array with dimension <code>[[n_species]]</code>
| Any real array with dimension <code>[[n_species]]</code>
| '''TurboGAP''' will try to set defaults for known elements, 0. otherwise; '''TurboGAP''' will print a WARNING if it does not know any defaults.
| [[van der Waals corrections]], <code>[[vdw_type]]</code>, <code>[[vdw_rcut]]</code>, <code>[[vdw_sr]]</code>, <code>[[vdw_d]]</code>, <code>[[vdw_c6_ref]]</code>, <code>[[vdw_alpha0_ref]]</code>, <code>[[species]]</code>, <code>[[n_species]]</code>
|}

=== Example ===

 [[n_species]] = 2
 [[species]] = H C
 [[vdw_type]] = "ts"
 [[vdw_rcut]] = 15.
 [[vdw_sr]] = 0.94
 [[vdw_d]] = 20.
 [[vdw_c6_ref]] = 3.88 27.8 ! eV * Angstrom^6, one per species
 [[vdw_r0_ref]] = 1.64 1.9 ! Angstrom, one per species
 [[vdw_alpha0_ref]] = 0.667 1.778 ! Angstrom^3, one per species