COMMENT 'Thermodynamic, Structural and Morphological Studies on Liquid-Crystalline Blue Phases' by H. Stegemeyer, Th. Blumel, K. Hiltrop, H. Onusseit and F. Porsch
01 January 1988
In the review article on cholesteric blue phases by Stegemyer et al.1 the crystal habit of blue I (BPI) is shown with [001] facets (mentioned in Table 3 and shown in Fig.17). If this facet is present, it is important to realize that the bcc phase of BPI is unlikely to be 0 to the 8th power because for this symmetry, the four-fold axis is a screw axis.2