NaCa2FeMn3OSiO4

NaCa2FeMn3OSiO4 is a complex mixed-cation silicate with a formula that combines sodium, calcium, iron, manganese, silicon, and oxygen in a single unit. The composition implies one Na+, two Ca2+, one Fe, and three Mn per formula, associated with a silicate tetrahedron (SiO4) within an oxide framework, with five oxygens in total.

There are no widely cited crystallographic data for this exact composition in mainstream databases, and the precise crystal system or cation ordering has not been established. The likely structure would feature a silicate lattice accommodating multiple large cations, with oxidation states not specified in common references.

Occurrence is limited; the formula is sometimes listed in mineral data compilations as a synthetic or hypothetical silicate rather than a well-characterized natural species. As a result, detailed physical properties such as color or hardness are not documented for this composition.

In solid-state chemistry and crystallography, NaCa2FeMn3OSiO4 serves as a test case for multi-cation ordering in silicate frameworks and for exploring stability trends in mixed-metal orthosilicates.