The title compound, Sm3 (SiO4),2Cl, crystallizes in orthorhombic system, space group Pnma, with cell dimensions a= 7. 023 (2), b= 18. 022 (4), c= 6. 282(3) A, V= 795, 1(4) A3, Z=4, D.=5- 60 g/cm3, M.=670. 67, F(000) =...The title compound, Sm3 (SiO4),2Cl, crystallizes in orthorhombic system, space group Pnma, with cell dimensions a= 7. 023 (2), b= 18. 022 (4), c= 6. 282(3) A, V= 795, 1(4) A3, Z=4, D.=5- 60 g/cm3, M.=670. 67, F(000) =1180, μ= 226. 1 cm-1. The final R= 0. 069, Rw = 0. 080 for 1370 observed reflections with I≥3. 0δ(I). Independent Sm(1)O6Cl2 and Sm(2)O7Cl polyhedra are connected throughshared-edge with each other along a direction, but both linked by sharing a face O2Cl toform a three-dimensional network structure.展开更多
The title compound was obtained by high temperature solid state reaction and flux method. The crystal belongs to tetragonal system, space group P41, withcell dimensions a= 6. 738(2), c= 24. 532 (3) A, V= 1113. 8(3) A ...The title compound was obtained by high temperature solid state reaction and flux method. The crystal belongs to tetragonal system, space group P41, withcell dimensions a= 6. 738(2), c= 24. 532 (3) A, V= 1113. 8(3) A 3, Z= 8, Mr =456. 65, Dc= 5. 45 g/cm3, F(000) = 1632, μ= 189. 3 cm-1. R=0.052, Rw=0. 059.The structure consists of isolated Si2O7 double tetrahedra which are arranged in layersperpendicular to the c axis. Four crystallographically different rare earth atoms in oneunit cell are located on each side of the layers and connect the four nearest SiO4 tetrahedra to form a three-dimensional network structure.展开更多
The title compound Gd3BSi2O10 crystallizes in orthorhombic system,space group Pbca, with dimensions of a= 9. 630(1), b= 6. 959(1), c= 22. 792(3) A,V= 1527. 4(4) A 3, Z=8, Mr= 698. 73, Dc= 6.08 g/cm3, F(000) =2440, p= ...The title compound Gd3BSi2O10 crystallizes in orthorhombic system,space group Pbca, with dimensions of a= 9. 630(1), b= 6. 959(1), c= 22. 792(3) A,V= 1527. 4(4) A 3, Z=8, Mr= 698. 73, Dc= 6.08 g/cm3, F(000) =2440, p= 262.5 cm-1, R=0. 047,,Rw=0. 053, based on 3750 with I≥3. 0 1(I) observed independent reflections. The structure contains two kinds of isolated anions: (BSi (1)O6)5- and(Si(2)O4)4- independently forming isolated sheets arranged alternately along the c axis. The Polyhedra of three crystallographically independent rare earth atoms Gd (1),Gd (2), Gd(3) are connected through edges-shared each other to form a three dimensional network structure.展开更多
The title compound crystallizes in monoclinic system, space group C2/m with cell dimensions of a=6. 843(2), b=8. 939(2), c=4. 720(1) A, β=101. 77(2), V=282. 7A3, Z=2, Mr=502. 69, Dc=5' 91 g·cm-3, u(MoKa)=303...The title compound crystallizes in monoclinic system, space group C2/m with cell dimensions of a=6. 843(2), b=8. 939(2), c=4. 720(1) A, β=101. 77(2), V=282. 7A3, Z=2, Mr=502. 69, Dc=5' 91 g·cm-3, u(MoKa)=303. 0cm-1, F(000) ~ 440. The structure solution and refinement are based on 869 uniqueobserved reflections with I≥3(I) and the final discrepancy factors converged at R=0. 034, Rw= 0. 042. The structure is considered to be the oxygen atoms packed innearly hexagonal arrangement with rare earth atoms in the octahedral and silicon atomsin tetrahedral holes in alternately parallel layers.展开更多
文摘The title compound, Sm3 (SiO4),2Cl, crystallizes in orthorhombic system, space group Pnma, with cell dimensions a= 7. 023 (2), b= 18. 022 (4), c= 6. 282(3) A, V= 795, 1(4) A3, Z=4, D.=5- 60 g/cm3, M.=670. 67, F(000) =1180, μ= 226. 1 cm-1. The final R= 0. 069, Rw = 0. 080 for 1370 observed reflections with I≥3. 0δ(I). Independent Sm(1)O6Cl2 and Sm(2)O7Cl polyhedra are connected throughshared-edge with each other along a direction, but both linked by sharing a face O2Cl toform a three-dimensional network structure.
文摘The title compound was obtained by high temperature solid state reaction and flux method. The crystal belongs to tetragonal system, space group P41, withcell dimensions a= 6. 738(2), c= 24. 532 (3) A, V= 1113. 8(3) A 3, Z= 8, Mr =456. 65, Dc= 5. 45 g/cm3, F(000) = 1632, μ= 189. 3 cm-1. R=0.052, Rw=0. 059.The structure consists of isolated Si2O7 double tetrahedra which are arranged in layersperpendicular to the c axis. Four crystallographically different rare earth atoms in oneunit cell are located on each side of the layers and connect the four nearest SiO4 tetrahedra to form a three-dimensional network structure.
文摘The title compound Gd3BSi2O10 crystallizes in orthorhombic system,space group Pbca, with dimensions of a= 9. 630(1), b= 6. 959(1), c= 22. 792(3) A,V= 1527. 4(4) A 3, Z=8, Mr= 698. 73, Dc= 6.08 g/cm3, F(000) =2440, p= 262.5 cm-1, R=0. 047,,Rw=0. 053, based on 3750 with I≥3. 0 1(I) observed independent reflections. The structure contains two kinds of isolated anions: (BSi (1)O6)5- and(Si(2)O4)4- independently forming isolated sheets arranged alternately along the c axis. The Polyhedra of three crystallographically independent rare earth atoms Gd (1),Gd (2), Gd(3) are connected through edges-shared each other to form a three dimensional network structure.
文摘The title compound crystallizes in monoclinic system, space group C2/m with cell dimensions of a=6. 843(2), b=8. 939(2), c=4. 720(1) A, β=101. 77(2), V=282. 7A3, Z=2, Mr=502. 69, Dc=5' 91 g·cm-3, u(MoKa)=303. 0cm-1, F(000) ~ 440. The structure solution and refinement are based on 869 uniqueobserved reflections with I≥3(I) and the final discrepancy factors converged at R=0. 034, Rw= 0. 042. The structure is considered to be the oxygen atoms packed innearly hexagonal arrangement with rare earth atoms in the octahedral and silicon atomsin tetrahedral holes in alternately parallel layers.
