A　new　solid　solution　Bi1.48Eu0.52Pb0·5Sr0·5B2O7　was　prepared　by　the　high-temperature　solid　state　reaction　at　850　°C　and　its　crystal　structure　was　determined　by　single-crystal　XRD　analysis　with　following　crystal　data:　R3¯c,　a　=　9.0085(2)　Å,　c　=　38.8910(9)　Å,　V　=　2733.26(13)　Å3　and　Z　=　18.　It　has　a　layered　structure　in　which　alternating　[BO3]3-　triangles　and　[(Pb/Sr)O6]10−　trigonal　prisms　are　connected　via　common　O　vertexes　to　generate　a　2D　layer,　with　[(Bi/Eu)2O]4+　groups　located　in　the　six-membered　ring　channels　within　the　layer.　Two　3¯　axis　related　layers　are　stacked　rhombohedrally　along　the　c-axis　to　build　a　unit　cell　and　held　together　by　weak　(Bi/Eu)-O　bonds.　The　existence　of　BO3　groups　was　confirmed　by　vibrational　spectroscopy,　the　optical　band　gap　was　determined　with　the　UV–vis　absorption　measurements,　and　the　chemical　states　of　the　elements　were　analyzed　by　XPS　spectroscopy.　Furthermore,　the　Bi2-xPb0.5Sr0·5B2O7:xEu3+　(0.10　≤　x　≤　0.50)　phosphors　were　synthesized　via　the　solid-state　reaction　method　and　their　photoluminescence　properties　were　studied.　The　emission　spectra　consist　of　groups　of　peaks　in　the　red　spectral　region　due　to　5D0→7Fj　(j　=　0,　1,　2,　3)　electronic　transitions　of　Eu3+　ions　and　the　optimal　Eu3+　content　was　found　to　be　x　=　0.3.　The　CIE　coordinates　of　the　Bi1.70Eu0.30Pb0·5Sr0·5B2O7　phosphor　was　obtained　to　be　(0.640,　0.359)　and　the　QE　value　was　equal　to　15.41%.　Moreover,　its　synthetic　temperature　is　low.　The　characteristics　make　the　Bi2-xPb0.5Sr0·5B2O7:xEu3+　(0.10　≤　x　≤　0.50)　compounds　to　be　promising　reddish-orange　phosphors　for　white　LEDs.　©　2021　Elsevier　B.V.