The spv command sets the scattering plane vectors.
The syntax for the spv command is:
spv h1 k1 l1 h2 k2 l2
where the scattering plane is defined by the peaks (h1,k1,l1) and
(h2,k2,l2).
The parameters set from the spv command
can also be set from the GUI by selecting the UB Matrix
tab from the Sample
top-level tab. The scattering plane vectors will only be available
when the mode is set to Define scattering
plane vectors and 1 reflection. The indices defining the
scattering plane are typed in the control at the bottom of the tab.
To calculate the UB matrix from this information hit the blue Calculate
UB Matrix Update Orientation Information button.
NOTE: the orientation information is easier to modify from the GUI than
from the command-line as it allows the user to preview the orientation
information prior to accepting the changes. The spv command
should only be executed from the command-line by experienced users as it
could yield unexpected results. For detailed information about
entering orientation information from the GUI see the How to
align a single crystal guide.
