LEPAGE (mang[0.3]) (MaxDot) (TwoAxCrit[0.5])
The LEPAGE option in PLATON checks for possible higher metrical symmetry of the lattice (following the excellent algorithm published by Y. LePage, but coded independently from scratch).
mang is an optional parameter setting an alternative angular maximum deviation from metrical symmetry [default 0.3 degree].
MaxDot values greater than 2 may indicate non-merohedral twinning. The maximum value is 6.
TwoAxCrit is a parameter determining whether a lattice vector 'coincides' with a reciprocal lattice vector [default 0.5 Degree].
What is needed to run PLATON/LEPAGE is a small file ('x.spf') with the following data/instructions
CELL a b c alpha beta gamma
SPGR space group name (Can be the Laue equivalent)
and run with the instruction: platon x.spf
Note: The Spacegroup information is used only to pick-up the current lattice centering type. The alternative LATTICE instruction (i.e. LATT C for Spacegroup C2/c) would be sufficient.
TITL look for metrical symmetry
CELL 10 10 10 109.5 109.5 109.5
Alternatively, provide a RES, CIF, CSD or SPF structured dataset to PLATON and invoke LEPAGE by clicking on the LEPAGE button in the PLATON opening menu or with the instruction LEPAGE from the keyboard interface.