# Hydronium model compatible with TIP4P

**URL:** <https://gromacs.bioexcel.eu/t/hydronium-model-compatible-with-tip4p/5365>\
**Category:** User discussions\
**Tags:** forcefield\
**Created:** [December 5, 2022, 12:59pm UTC](https://gromacs.bioexcel.eu/t/hydronium-model-compatible-with-tip4p/5365 "2022-12-05T12:59:55Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![di\_jin](https://avatars.discourse-cdn.com/v4/letter/d/e274bd/32.png) [@di\_jin](https://gromacs.bioexcel.eu/u/di_jin)\
**Post date:** [December 5, 2022, 12:59pm UTC](https://gromacs.bioexcel.eu/t/hydronium-model-compatible-with-tip4p/5365/1 "2022-12-05T12:59:55Z")

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GROMACS version:  
GROMACS modification: Yes/No  
Here post your question

Hi,

I am looking for a hydronium force field which ideally would be compatible with the TIP4P model.  
I don’t mind that the model overlooks Grotthuss mechanism, and I am not modelling PH. These ions will be used to neutralize a surface.

Thanks!  
-Di