Biaxial mesophase anisotropies

With the prineipal phase axes, corresponding to the three directors /, m, and n (see Definition 3.3, Note 1) labelled X, Y, and Z such that >Xxx Xyy the major biaxial mesophase anisotropy,, is defined by... 

Note 1 See 3.1.1 for the definition of a uniaxial nematic mesophase, 5.8.1 for the definition of uniaxial mesophase anisotropy, and Definitions 3.3 and 5.8.2 relating to biaxial mesophases. 

Note 1 The long-range biaxial ordering of the mesophase means that the three principal components of a second-rank tensorial property will not normally be the same, hence the two measures of the anisotropy A/ and. ... 

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