|Acid dissolve rate
Clay dust is a 'sticky' powder, whose particles tend to cling to each other. Stickiness becomes stronger with lower temperatures, turning clay dust almost into a solid below -78°C. Because of its clinging abilities, clay dust tends to stack on top of itself like concrete.
Ceramic will break into clay dust below -30.0 pressure:
Clay dust with water gives solid paste:
Molten quartz and molten clay dust combine into ceramic: