Hi, Not sure - need to know the context. It may be a mistyped Shoenflies symbol for either space group P 21 21 2 (orthorhombic) or P321 (trigonal). Bob Von Dreele
R.B. Von Dreele IPNS Division Argonne National Laboratory Argonne, IL 60439-4814 -----Original Message----- From: Jana Bezjak [mailto:[EMAIL PROTECTED] Sent: Monday, January 28, 2008 7:43 AM To: rietveld_l@ill.fr Subject: Dear I would like to ask you for the explanation of the crystallographic notation D23 Thank you Jana Jana Bezjak Jozef Stefan Institute Jamova 39 SI-1000 Ljubljana, Slovenia Advanced Materials Department +386 (0)1 477-35-47