Mass loss rate divided by equilibrium pCO
slope vs. pressure for calcite samples of <150 μm particles and ~3 mm single crystals. If the decomposition reaction is limited by equilibrium pCO2, the ratio should be ~1. While this is true for the <150 μm calcite sample, the 3 mm single crystals have a much lower ratio, indicating that equilibrium pCO2 is not the limiting factor in decomposition. The error bars represent the 95% confidence interval of the slope parameter calculated by an exponential fit to the experimental DTG data.