A　new　solid　solution　Bi1.48Eu0.52Pb0.5Sr0.5B2O7　was　prepared　by　the　high-temperature　solid　state　reaction　at　850　degrees　C　and　its　crystal　structure　was　determined　by　single-crystal　XRD　analysis　with　following　crystal　data:　R　(3)　over　barc,　a　=　9.0085(2)　angstrom,　c　=　38.8910(9)　angstrom,　V　=　2733.26(13)　angstrom(3)　and　Z　=　18.　It　has　a　layered　structure　in　which　alternating　[BO3](3-)　triangles　and　[(Pb/Sr)O-6](10-)　trigonal　prisms　are　connected　via　common　O　vertexes　to　generate　a　2D　layer,　with　[(Bi/Eu)(2)O](4+)　groups　located　in　the　six-membered　ring　channels　within　the　layer.　Two　(3)　over　bar　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:xEu(3+)　(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　D-5(0)-＞　F-7(j)　(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:xEu(3+)　(0.10　＜=　x　＜=　0.50)　compounds　to　be　promising　reddish-orange　phosphors　for　white　LEDs.