[Figure 1]
Figure 1 The crystal structure of lautite down [010]. Displacement parameters are drawn at the 70% probability level. The unit-cell is outlined. Symmetry codes are: (i) -x + [{1\over 2}]; -y; z + [{1\over 2}]; (ii) x + [{1\over 2}]; -y + [{1\over 2}]; -z + [{1\over 2}]; (iii) -x; y + [{1\over 2}]; -z.  [article HTML]