Dear All, The rhomobohedral information for the present fullprof version should be given in hexagonal format. you can refer the rhombohedral-hexagonal transformation given in the appendices of book"Elements of X-ray diffraction" by B.D. Cullity. I hope it will solve your problem. Regards, Geetika
-- "A successful man is one who can lay a firm foundation with the bricks others have thrown at him" Regards, Geetika Research Scholar, C/o Prof. A. M. Umarji, Materials Research Centre, Indian Institute of Science, Bangalore,Karnataka. Pin Code-560012
