Oxide　of　tungstate　has　consistently　been　pursued　for　use　in　optoelectronic　applications.　This　study　details　the　synthesis　of　AWO4　(A　=　Ba,　Sr　and　Ca)　using　a　high-temperature　solid-state　method.　Additionally,　theoretical　calculations　highlight　its　electronic　structure,　density　of　states,　photoelectric　properties,　and　vibrational　modes.　The　x-ray　diffraction　of　AWO4　(A　=　Ba,　Sr　and　Ca)　was　meticulously　introduced　by　the　utilization　of　Rietveld　for　refinement.　The　refined　lattice　parameters　substantially　verified　AWO4　(A　=　Ba,　Sr　and　Ca)　as　a　tetragonal　system　of　scheelite　with　the　spatial　group　of　I41/a,　and　demonstrated　significant　alteration　with　the　discrepancy　in　the　radius　of　alkaline　earth　metal　(A-site)　ions.　The　electronic　configuration　and　optical　attributes　of　AWO4　(A　=　Ba,　Sr　and　Ca)　possessing　scheelite-like　structure　were　explored　using　density　functional　theory　(DFT)　based　computational　techniques.　The　theoretical　blueprint　was　derived　by　optimizing　the　structure　based　on　defects.　The　postulated　optical　bandgap　energy　confirms　the　occurrence　of　direct　electronic　transitions　at　Brillouin　region　G　points.　Calculations　suggested　the　direct　band　gaps　of　BaWO4,　SrWO4,　and　CaWO4　at　4.385,　3.123　and　3.813　eV.　This　was　attributed　to　the　energy　levels　produced　by　O　and　A-site　atoms　in　the　valence　band,　and　W　and　O　atoms　in　the　conduction　band.　An　examination　of　the　polarization　effect　and　uneven　electronic　charge　distribution　between　[CaO8]6−　and　[WO4]2−　clusters　brought　about　by　structural　defects　in　AWO4　(A　=　Ba,　Sr　and　Ca)　was　performed.　Moreover,　advanced　investigations　have　been　conducted　on　the　elastic　constants　and　mechanical　durability　of　AWO4　(A　=　Ba,　Sr　and　Ca).　This　research　extensively　calculated　the　elastic　moduli　of　various　matrices　utilizing　DFT.　The　critical　Pugh’s　ratio　value　was　found　to　be　＞1.75,　it　indicated　that　AWO4　(A　=　Ba,　Sr　and　Ca)　has　significant　potential　as　a　resilient　material.　©　2024　IOP　Publishing　Ltd.