  We report experimental observations of hexaroll chaos in inclined layer
convection. Two separate populations of defect complexes characterize the
defect turbulent state, one the classical penta-hepta defect of hexagonal
planform patterns, and the other a short-lived complex capable of
self-annihilation. By measuring the defect statistics we show that short-lived
defect complexes give rise to linear defect destruction rates. This observation
explains previous results in other defect-turbulent pattern forming systems.

Pattern Formation and Solitons