from_min_dspacing#

classmethod ReciprocalLatticeVector.from_min_dspacing(phase, min_dspacing=0.7)[source]#

Create a set of unique reciprocal lattice vectors with a a direct space interplanar spacing greater than a lower threshold.

Parameters:

phase (orix.crystal_map.Phase) – A phase with a crystal lattice and symmetry.
min_dspacing (float, optional) – Smallest interplanar spacing to consider. Default is 0.7, in the unit used to define the lattice parameters in phase, which is assumed to be Ångström.

Examples

>>> from diffpy.structure import Atom, Lattice, Structure
>>> from orix.crystal_map import Phase
>>> from diffsims.crystallography import ReciprocalLatticeVector
>>> phase = Phase(
...     "al",
...     space_group=225,
...     structure=Structure(
...         lattice=Lattice(4.04, 4.04, 4.04, 90, 90, 90),
...         atoms=[Atom("Al", [0, 0, 1])],
...     ),
... )
>>> rlv = ReciprocalLatticeVector.from_min_dspacing(phase)
>>> rlv
ReciprocalLatticeVector (798,), al (m-3m)
[[ 5.  2.  2.]
 [ 5.  2.  1.]
 [ 5.  2.  0.]
 ...
 [-5. -2.  0.]
 [-5. -2. -1.]
 [-5. -2. -2.]]
>>> rlv.dspacing.min()  
0.7032737300610338

Vectors are included regardless of whether they are kinematically allowed or not

>>> rlv = ReciprocalLatticeVector.from_min_dspacing(phase, 1)
>>> rlv.size
256
>>> rlv.allowed.all()
False