Simulated icosahedral twin bowties (dual tetrahedra) and butterflies (bowtie pairs) correspond to power-spectrum spots around an icosahedral twin lattice imageP. Fraundorf, Jinfeng Wang, Eric Mandell and Martin Rose (2006) "Digital darkfield tableaus", "Microscopy and Microanalysis" "12":s2, 1010-1011.P. Fraundorf and Chris Bishop (2013) "Efficient Lattice-Image Detection of Icosahedral Twins", "Microscopy and Microanalysis" "19":s2, 1804-1805., like the image down the 5-fold zone of a Pd icosahedral twin here. The left column are complex color images of periodicity amplitude and phase as a function of position across the cluster, while the right column shows the corresponding phase gradient i.e. vector strain image instead.