Platon’s Addsym - (1 of 2) finding extra symmetry in inorganics and minerals - P1 triclinic starting structure.

• Unpublished Mineral Example

  • Default Addsym gives C2/C

• Tighten the addsym values:

  • calc ADDSYM SHELX 1 0.2 0.4 0.2
  • addsym gives P 2/c and exact fit on Pc

• Loosening defaults:

  • calc addsym shelx exact 1 .2 .4 .4
  • P-31m

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