[ase-users] Radians or degrees?

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Usage of different units is the worst case. If it's unavoidable such values
should be wrapped. Something like that: https://pypi.python.org/pypi/units
Radians is a better choice, because they have geometrical meaning.
ase.spacegroup.crystal() calls cellpar_to_cell() that converts degrees into
radians.
Degrees are for visualization, representation, I/O etc. Radians - for
calculations.
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