FexMg1xOH2

FexMg1xOH2 is a chemical compound with the formula FeMg1x(OH)2, where x represents the molar ratio of magnesium to iron in the compound. It is a member of the hydrotalcite family of layered double hydroxides (LDHs). The general formula for LDHs is [M1-xM2x(OH)2]A_x/n·mH2O, where M1 and M2 are divalent cations, A is an interlayer anion, and x is the molar ratio of M2 to the total divalent cations.

FexMg1xOH2 is a mixed-metal hydroxide containing iron (Fe) and magnesium (Mg) in a 1:1 ratio. It is a greenish-brown powder with a layered structure. The compound is formed by the coprecipitation of iron and magnesium hydroxides in the presence of an interlayer anion, typically carbonate (CO3^2-) or nitrate (NO3^-).

The properties of FexMg1xOH2 can vary depending on the interlayer anion and the preparation conditions. It is a base with a pH typically ranging from 9 to 11. The compound is stable in air and water, but it can decompose upon heating, releasing water and forming metal oxides.

FexMg1xOH2 has several applications, including as a precursor for the synthesis of magnetic materials, as a catalyst support, and as a sorbent for the removal of heavy metals from water. It is also used in the production of pigments and as a component in ceramic and glass formulations.

The synthesis of FexMg1xOH2 typically involves the coprecipitation of iron and magnesium salts in the presence of an interlayer anion. The resulting precipitate is aged, filtered, and washed to remove excess salt and water. The final product is a greenish-brown powder that can be calcined to form a mixed-metal oxide.