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@ARTICLE{Murphy:902463,
      author       = {Murphy, Gabriel L. and Kegler, Philip and Langer, Eike M.
                      and Alekseev, Evgeny V.},
      title        = {{T}he {R}ole of {A}cidity in the {S}ynthesis of {N}ovel
                      {U}ranyl {S}elenate and {S}elenite {C}ompounds and {T}heir
                      {S}tructures},
      journal      = {Crystals},
      volume       = {11},
      number       = {8},
      issn         = {2073-4352},
      address      = {Basel},
      publisher    = {MDPI},
      reportid     = {FZJ-2021-04282},
      pages        = {965 -},
      year         = {2021},
      abstract     = {Herein, the novel uranyl selenate and selenite compounds
                      Rb2[(UO2)2(SeO4)3], Rb2[(UO2)3(SeO3)2O2],
                      Rb2[UO2(SeO4)2(H2O)]·2H2O, and (UO2)2(HSeO3)2(H2SeO3)2Se2O5
                      have been synthesized using either slow evaporation or
                      hydrothermal methods under acidic conditions and their
                      structures were refined using single crystal X-ray
                      diffraction. Rb2[(UO2)2(SeO4)3] synthesized hydrothermally
                      adopts a layered 2D tetragonal structure in space group
                      P42/ncm with a = 9.8312(4) Å, c = 15.4924(9) Å, and V =
                      1497.38(15) Å, where it consists of UO7 polyhedra
                      coordinated via SeO4 units to create units UO2(SeO4)58−
                      moieties which interlink to create layers in which Rb+
                      cations reside in the interspace. Rb2[(UO2)3(SeO3)2O2]
                      synthesized hydrothermally adopts a layered 2D triclinic
                      structure in space group P1¯ with a = 7.0116(6) Å, b =
                      7.0646(6) Å, c = 8.1793(7) Å, α = 103.318(7)°, β =
                      105.968(7)°, γ = 100.642(7)° and V = 365.48(6) Å3, where
                      it consists of edge sharing UO7, UO8 and SeO3 polyhedra that
                      form [(UO2)3(SeO3)2O2] layers in which Rb+ cations are found
                      in the interlayer space. Rb2[UO2(SeO4)2(H2O)]·2H2O
                      synthesized hydrothermally adopts a chain 1D orthorhombic
                      structure in space group Pmn21 with a = 13.041(3) Å, b =
                      8.579(2) Å, c = 11.583(2) Å, and V = 1295.9(5) Å3,
                      consisting of UO7 polyhedra that corner share with one H2O
                      and four SeO42− ligands, creating infinite chains.
                      (UO2)2(HSeO3)2(H2SeO3)2Se2O5 synthesized under slow
                      evaporation conditions adopts a 0D orthorhombic structure in
                      space group Cmc21 with a = 28.4752(12) Å, b = 6.3410(3) Å,
                      c = 10.8575(6) Å, and V = 1960.45(16) Å3, consisting of
                      discrete rings of [(UO2)2(HSeO3)2(H2SeO3)2Se2O5]2.
                      (UO2)2(HSeO3)2(H2SeO3)2Se2O5 is apparently only the second
                      example of a uranyl diselenite compound to be reported. A
                      combination of single crystal X-ray diffraction and bond
                      valance sums calculations are used to characterise all
                      samples obtained in this investigation. The structures
                      uncovered in this investigation are discussed together with
                      the broader family of uranyl selenates and selenites,
                      particularly in the context of the role acidity plays during
                      synthesis in coercing specific structure, functional group,
                      and topology formations},
      cin          = {IEK-6},
      ddc          = {540},
      cid          = {I:(DE-Juel1)IEK-6-20101013},
      pnm          = {1411 - Nuclear Waste Disposal (POF4-141)},
      pid          = {G:(DE-HGF)POF4-1411},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000689925500001},
      doi          = {10.3390/cryst11080965},
      url          = {https://juser.fz-juelich.de/record/902463},
}