Sublimation of Moth Crystals (para-Dichlorobenzene)
Less toxic than naphthalene, para-dichlorobenzene also has a very high vapor pressure and is effective in disrupting the destruction of clothes by moths. When recrystallized from the melt, will slowly crystallize, forming beautiful dendritic needle-like crystals that slowly sublime. The time-lapse movie was made using a modified version of the Intel Play QX3 microscope equipped for polarized light illumination with a full-wave (first order) retardation plate.