Force fields

MOF-FF parameters, the reference systems they were fitted against, and the fragments that decide which parameters apply to which atoms. This data has been served through the API for years; this is its first page.

Force fields

Parameter sets available for assignment
Name Mixing rule Cut-off / Å Notes
MOF-FF Lorentz-Berthelot 12.0 First-principles parameterised force field for MOFs. Demonstration record from the development seed — not production data.

Reference systems

Each fit is derived from reference calculations on small model systems. A parameter you download can be traced back to the reference it came from.

Reference systems, highest priority first
NamePriorityNotes
benzene 10 Reference system. Demonstration record from the development seed — not production data.

Fragments

Assignment works by matching fragments against your structure, highest priority first. A fragment carries the atom types its parameters are keyed on.

Fragments used for atom typing
Name Priority Atom types
ph 6 c3_c2h1
zn4o 5 zn4_o4
co2 3 c3_c2o1, o2_c1

Assigning a force field to your own structure

You do that from a script rather than from this page — see Assign a force field to a structure. The endpoints behind it are documented in the API reference.