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VDW_S6 = [real]
Default: none
Description: VDW_S6 defines the global scaling factor .
VDW_S6 sets the global scaling factor in the DFT-D2, DFT-D3], DFT-ulg, DDsC and Tkatchenko-Scheffler methods.
DFT-D2, DFT-D3, DFT-ulg, DDsC, Tkatchenko-Scheffler method