Is there anybody who could tell me if these parameters for Na2SO4 (thenardite) are the correct ones: space group Fddd (70) / 8FU/unit cell Na in 16(f) with y=.4415 S in 8(a) O in 32(h) with x=-.0206, y=-.0285, z=-.0199 These are the values reported for Na2SO4 by Mehrotra et. al. in Neues Jb. Miner. Mh. p. 408-421 (1978) Thanks L. Keller