Hourglass inclusions

9 r I Gibson, V. C. and McPartlin, M., Bond Stretch Isomerism Fact or Artefact , J. Chem. Soc., Dalton Trans., 1992, 947-956. 

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Figure 8.19 Hourglass inclusion compounds of K2S04 with a range of coloured dyes. (Courtesy of Prof. B. Kahr and Dr. J. A. Subramony.)... 

Figure 8.17 Schematic drawing of the characteristic coloured and colourless regions of an hourglass inclusion compound. (Reprinted with permission from [21] 1994 American Chemical Society).

Figure 3.16 Hourglass inclusion of acid fuschine dye in potassium sulfate (Kahr et al. 1993). (Reproduced with permission from Division of Chemical Education, Inc., American Chemical Society.)...

Vetter. W. Dudley. M. Totsuka, H. Kahr. B. The perfection and defect structure of organic hourglass inclusion K2SO4 crystals. J. Cryst. Growth 2002. 241. 498-506. 

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