Transient crystallisation of rare earth carbonates during the hydrothermal oxidation of siderite.

ABSTRACT: The researchers investigated the interaction between multi-component rare earth element-bearing aqueous solutions and siderite grains under hydrothermal conditions. Our study investigates the interaction between multi-component rare earth element (REE; La, Ce, Pr, Nd, Dy)-bearing aqueous solutions and siderite (FeCO₃) grains under hydrothermal conditions (50-205 °C). The results revealed a solution-mediated mineral replacement reaction that occurs via a multi-step crystallisation pathway involving the formation of iron oxides (goethite, α-FeO(OH), and hematite, Fe₂O₃), metastable REE-bearing minerals (kozoite, REE(CO₃)(OH), and bastnasite, REE(CO₃)(OH,F)), and cerianite (CeO₂). Siderite stability, dissolution, and sub

SUBMITTER: M M 

PROVIDER: S-EPMC11536270 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature