menucheckCIF procedure
PLAT157
PLAT157 Type_4 Check for non-standard monoclinic beta angle < 90 Degrees.
By convention, the Monoclinic beta angle is always chosen to be larger than 90.0 Degrees. A trivial transformation (1 0 0/0 -1 0/0 0 -1) should be applied to the data.
