  The realization of the stable structure of Heusler compounds and the study of
different properties is an important step for their potential application in
spintronics and magnetoelectronic devices. In this paper, using the plane-wave
pseudopotential method within the framework of density functional theory (DFT),
we investigate 25 Quaternary Heusler compounds for their electronic, magnetic,
and mechanical properties. The Open Quantum Materials Database (OQMD) is used
to screen a large number of compounds to narrow down the possible synthesizable
materials. The convex-hull distance and elastic constants are exploited to
confirm the thermodynamic and mechanical stability of the compounds. The
careful study of the different structures suggests that 5 of the compounds
crystallize in type-1 structure whereas 20 compounds adopt type-3 structure.
The possible explanation for the observed behavior is made by invoking
electronegativity arguments and through the study of individual spin magnetic
moments in different structures. The compounds with diverse electronic and
magnetic properties such as half-metallicity, spin gapless semiconducting
behavior, and non-magnetic semi-conducting property have been identified.
