Mn3Mn4

Mn3Mn4 is a term that may appear in discussions of manganese-rich alloys, but it does not correspond to a clearly defined, widely recognized compound. In simple stoichiometric terms, Mn3Mn4 would reduce to Mn7, which is not a standard binary phase. As a result, Mn3Mn4 is not listed as a distinct intermetallic in major databases, and there is no single accepted crystal structure, space group, or set of physical properties associated with it.

In published work, the notation often reflects either a misnotation, a nonstoichiometric composition range within a Mn-rich phase, or a more complex alloy (ternary or quaternary) that includes manganese with other elements. Therefore, any report of Mn3Mn4 should be examined for context: the exact composition, the alloy system, and the synthesis conditions.

Because no consensus exists for this exact formula, there are no standard magnetic, electronic, or mechanical properties that can be cited generally. If a study asserts a phase labeled Mn3Mn4, it should provide detailed structural characterization (for example, X-ray diffraction data) and composition analysis.

See also: manganese, intermetallics, Mn-based alloys, Heusler alloys, non-stoichiometry.