The stellate crystals on the Rigaku Synergy or Synergy R were measured and the data were fully processed with CrysAlis PRO 1.171.40, software package (Rigaku OD, 2018). Prior to the X-ray measurement, a 360º video of the mounted crystal was taken for absorption corrections and crystal morphology determination. The approximate magnification of this video system is x450, allowing us to clearly view the crystal (Figures and). The video camera of XtaLab Pro is unfortunately of insufficient magnification for this purpose. After the unit cell and space group were determined and the structure solution completed (with Shelxl and Shelxt as implemented in Olex2 Gui), the prerecorded video frames were used for crystal face indexing routine. The unit cell axes vis-à-vis the crystal were determined (Figures and). The crystal shape routine of CrysAlis Pro allows for the placement of the best planes the crystal faces, and the approximate Miller indices (hkl) of the faces were indexed where the estimated low integer hkl option was used. It should be noted that the program routine does not allow for the drawing of the unexpected re-entrant angles. Some faces were obscured by the loop or by the meniscus of the cryoprotectant oil. The best planes were identified for each of the faces, where possible. The star morphology appears to comprise vicinal faces that cause deviation from the traditional 1 st -order hexagonal prism. In our case, as in other 1 st -order prisms, the unit cell axes emerge from the vertices between the two prism faces and the Miller indexes; (S4) if it were not for the concavity, the faces would be the expected {100} family or in Miller-Bravais{1010}.