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iron 11 phosphate formula is a synthetic form of iron with a sulfate group and a phosphorus group. It is used in a wide variety of pharmaceuticals, medical devices, and nutritional supplements. It has been shown to be safe for use in pregnant women, infants, and children. It is also used to treat gastrointestinal disorders such as iron deficiency and constipation, and to prevent or reduce complications of chronic diseases of the liver and kidneys, such as hemochromatosis.

A new compound with the formula Fe7P11O38 is obtained by the reduction of iron sulfate in hydrochloric acid and then calcined in air at high temperatures. It is found to have a high degree of crystallochemical stability. The obtained phase exhibits an antiferromagnetic interaction between the iron ions and is magnetically active with three individual inequivalent iron sites: two octahedral sites joined by [Fe2O9] dimers and one tetrahedral site separated from the dimers by [PO4] tetrahedra.

The Mossbauer spectrum consists of three components with very similar values of IS and e2Q/2, indicating that the irons are in the octahedral coordination. The higher e2Q/2 value is associated with the octahedral site. The lower e2Q/2 value is associated with one of the tetrahedral sites and is probably the result of a change in the Fe-O distance or octahedral volume.

The in vitro mutagenicity of elemental and salt forms of iron (Fe) currently being used in dietary supplements and for food fortification was evaluated in Salmonella typhimurium and L5178Y mouse lymphoma cells. The results showed that none of the salts tested, except for ferric sulfate, caused a mutagenic response in either cell line.

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