Figure 1: Scaling relation (ratio of sublimative to radiative heat loss) for the olivine species fayalite and forsterite, metallic iron, and the pyroxene species enstatite as a function of distance and temperature of 0.6 solar mass white dwarf.

The region of sublimative and radiative cooling regimes are denoted on the fayalite plot, which applies to all four species. Dashed and dash-dotted lines denote the rigid body Roche limit for densities of 3500 and 2000 kg/m³ respectively. The transition point from radiative to sublimative cooling when this ratio approaches 1 (horizontal dotted grey line) creates an inflection point that represents the sublimation radius, and thus the inner edge of any disk of dusty debris composed of that species. These four species are major components of chondritic and achondritic materials, and represent likely major components of a dusty debris disk.