The diffusion rates of Ca and F into haplogranitic melt were determined by concentration profiles in glasses produced by dissolving fluorite crystals into haplogranitic melt at 900¿--1000¿C and 75--100 MPa. Starting products were synthesized from oxides of haplogranitic composition at two aluminosities (2O + K2O>/Al2O3 = 1.05 and 1.68). Fluorite crystals or crystal powders were coupled with powders or solid cylinders of haplogranitic glass. Water was added to the runs, resulting in two runs at H2O = 1.20 and 1.40 wt% and three runs thought to be water saturated. The materials were then subjected to the conditions of interest in either a Stellite cold seal apparatus or an internally heated pressure vessel. Electron microprobe traverses of the quenched glasses produced in these experiments revealed negative concentration gradients in Ca and F away from the fluorite-glass boundary. These gradients are comparable to an error function solution (in the first approximation) for specific Ca and F diffusivities (DCa and DF, respectively). The Ca diffusion coefficient increased from 3.36 ¿ 0.19 ¿ 10-9 to 2.16 ¿ 0.28 ¿ 10-8 cm2/s and F diffusivity increased from 1.16 ¿ 0.09 ¿ 10-8 to 6.59 ¿ 0.62 ¿ 10-8 cm2/s as temperature increased from 900¿ to 1000¿C. These diffusivities are comparable to other published melt diffusion data for the dissolution of multicomponent minerals where the diffusants move independently. Calcium and fluorine diffusivities increase from 2.77 ¿ 0.09 ¿ 10-9 to 2.16 ¿ 0.28 ¿ 10-8 cm2/s and from 2.27 ¿ 0.10 ¿ 10-8 to 6.59 ¿ 0.62 ¿ 10-8 cm2/s, respectively, with increasing water content at 1000¿C, likely due to melt depolimerization. The large difference in the concentrations of Ca (C0Ca) and F (C0F) at the fluorite-glass interface suggests that these two elements diffuse independently in the melt. In contrast, the concentration gradient for Na parallels that of F, suggesting complexing between these two elements.