Obtaining a precipitate of calcium fluoride | CaCl2 + 2HF = Саf2 + 2hcl
In nature, calcium fluoride is found in the form of the mineral fluorspar, or feldspar, often clear or colored crystals.
Despite the low solubility in water, calcium fluoride precipitate falls immediately, so that the slow addition of reagents could try to grow quite large crystals.
https://chemiday.com/en/reaction/3-1-...
https://chemiday.com/en/reaction/3-1-...
CaCl2 + 2HF = CaF2 + 2HCl