The rare earth content of rare earth carbonate is 60% Rare earth carbonate is a mixture of rare earth carbonates, which is a high-grade product in the separation of rare earths. The preparation process of rare earth carbonate is to mix 60% rare earth (ore concentrate) with concentrated lye and melt it at high temperature. Chinese name: rare earth carbonate English name: Rare earth carbonate Alias: rare earth carbonate Product use: used in industries such as aluminum and rare earth alloys