# GAL19

Section can be repeated.

References: Clabaut2020

Implementation of the GAL19 forcefield, see associated paper [Edit on GitHub]

Subsections

- GCN

## Keywords

- A

- A1

- A2

- A3

- A4

- ATOMS

- B

- BXY

- BZ

- C

- EPSILON

- FIT_EXPRESS

- METALS

- R

- RCUT

## Keyword descriptions

A: real = 6.27509469E+003 [kcalmol]

  Usage: A {real}

  Defines the A parameter of GAL19 potential [Edit on GitHub]

A1: real = 6.27509469E+003 [kcalmol]

  Usage: a1 {real}

  Defines the a1 parameter of GAL19 potential [Edit on GitHub]

A2: real = 6.27509469E+003 [kcalmol]

  Usage: a2 {real}

  Defines the a2 parameter of GAL19 potential [Edit on GitHub]

A3: real = 6.27509469E+003 [kcalmol]

  Usage: a3 {real}

  Defines the a3 parameter of GAL19 potential [Edit on GitHub]

A4: real = 6.27509469E+003 [kcalmol]

  Usage: a4 {real}

  Defines the a4 parameter of GAL19 potential [Edit on GitHub]

ATOMS: string[2]

  Usage: ATOMS {KIND1} {KIND2}

  Defines the atomic kind involved in the nonbond potential [Edit on GitHub]

B: real = 1.88972613E+001 [angstrom^-1]

  Usage: B {real}

  Defines the B parameter of GAL19 potential [Edit on GitHub]

BXY: real = 1.31714728E+001 [angstrom^-2]

  Usage: bxy {real}

  Defines the b perpendicular parameter of GAL19 potential [Edit on GitHub]

BZ: real = 3.23860765E+001 [angstrom^-2]

  Usage: bz {real}

  Defines the b parallel parameter of GAL19 potential [Edit on GitHub]

C: real = 1.37792973E+002 [angstrom^6*kcalmol]

  Usage: C {real}

  Defines the C parameter of GAL19 potential [Edit on GitHub]

EPSILON: real = 6.00000000E-001 [kcalmol]

  Usage: epsilon {real}

  Defines the epsilon_a parameter of GAL19 potential [Edit on GitHub]

FIT_EXPRESS: logical = F

  Lone keyword: `T`

  Usage: Fit_express TRUE

  Demands the particular output needed to a least square fit [Edit on GitHub]

METALS: string[2]

  Usage: METALS {KIND1} {KIND2} ..

  Defines the two atomic kinds to be considered as part of the metallic phase in the system [Edit on GitHub]

R: real[2] = [angstrom]

  Usage: r {real} {real}

  Defines the R_0 parameters of GAL19 potential for the two METALS. This is the only parameter that is shared between the two section of the forcefield in the case of two metals (alloy). If one metal only is present, a second number should be given but won’t be read [Edit on GitHub]

RCUT: real = 3.20000000E+000 [angstrom]

  Usage: RCUT {real}

  Defines the cutoff parameter of GAL19 potential [Edit on GitHub]