Mechanochemical synthesis and transformation of the polymorphic double carbonates fairchildite and buetschliite, (K2Ca(CO3)2): an in situ X-ray powder diffraction study

The synthesis of double carbonates (K 2 Ca(CO 3 ) 2 ) has been studied by in situ and ex situ powder diffraction experiments. The results provide insights into the formation of these materials, which are of interest in geosciences and applied mineralogy.