TIP4P model of water

The TIP4P model is a rigid planar four-site interaction potential for water, having a similar geometry to the original Bernal and Fowler model.

Parameters

$r_{\mathrm {OH} }$ (Å)	$\angle$HOH , deg	$\sigma$ (Å)	$\epsilon /k$ (K)	q(O) (e)	q(H) (e)	q(M) (e)	$r_{\mathrm {OM} }$ (Å)
0.9572	104.52	3.154	78.0	0	0.52	-2q(H)	0.15

Phase diagram

Plastic crystal phases

Recent simulations have demonstrated the existence of plastic crystal phases for the TIP4P model.

• J. L. Aragones and C. Vega "Plastic crystal phases of simple water models", Journal of Chemical Physics 130 244504 (2009)

Shear viscosity

The shear viscosity for the TIP4P model is 0.494 mPa.s at 298 K and 1 bar (experimental value 0.896 mPa.s ).

See also

The following is a list of empirical models that build upon this TIP4P model:

• TIP4F
• TIP4P
• TIP4P/2005
• TIP4P-Ew
• TIP4P/FQ
• TIP4P-HB
• TIP4P/Ice
• TIP4P-pol
• TIP4PQ/2005
• TIP4P-QDP
• TIP4P-QDP-LJ