% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@ARTICLE{Li:852543,
      author       = {Li, Haijian and Langer, Eike and Kegler, Philip and Modolo,
                      Giuseppe and Alekseev, Evgeny},
      title        = {{F}ormation of {O}pen {F}ramework {U}ranium {G}ermanates:
                      {T}he {I}nfluence of {M}ixed {M}olten {F}lux and {C}harge
                      {D}ensity {D}ependence in {U}-{S}ilicate and {U}-{G}ermanate
                      {F}amilies},
      journal      = {Inorganic chemistry},
      volume       = {57},
      number       = {17},
      issn         = {1520-510X},
      address      = {Washington, DC},
      publisher    = {American Chemical Society},
      reportid     = {FZJ-2018-05463},
      pages        = {11201 - 11216},
      year         = {2018},
      abstract     = {Seven novel open-framework uranyl germanates, K2(UO2)GeO4,
                      K6(UO2)3Ge8O22, α-Cs2(UO2)Ge2O6, β-Cs2(UO2)Ge2O6,
                      Cs2(UO2)GeO4, and A(UO2)3(Ge2O7)2 (A = [NaK6Cl]6+,
                      [Na2Cs6Cl2]6+), were grown from different mixed molten
                      fluxes. The three-dimensional (3D) structure of K2(UO2)GeO4
                      with 8-ring channels can be built upon [UGe4] pentamer
                      secondary building units (SBUs). The 3D framework of
                      K6(UO2)3Ge8O22 with trapezoid (Ge8O22)12– clusters
                      consists of two types of [UGe4] pentamers. The 3D framework
                      of α-Cs2(UO2)Ge2O6 with 10-ring channels, crystallizing in
                      the P21/n space group, is constructed by [UGe4] pentamers.
                      The structure of β-Cs2(UO2)Ge2O6 contains achter (eight)
                      single germanate chains and is composed of [UGe6] heptamers
                      and [UGe4] pentamers. The structure of Cs2(UO2)GeO4 with
                      hexagonal 10-ring channels is composed of [U3Ge4] heptamers
                      and twisting five-fold GeO4 tetrahedra in four-membered
                      Ge4O12 rings occur. 3D frameworks of NaK6Cl(UO2)3(Ge2O7)2
                      (space group Pnnm) and Na2Cs6Cl2(UO2)3(Ge2O7)2 (P21/c) can
                      be constructed from the same SBUs [UGe4] pentamers. Thermal
                      stability of salt-inclusions was studied by TG and PXRD
                      analysis. Analysis of charge density for the U–Si–O
                      system indicates that the polymerization of silicate units
                      reduces the cross-links of the 3D frameworks. The concept of
                      SBUs combined with the cutting and gluing strategy was
                      applied to understand and analyze the distinct 8-, 10-, 12-,
                      and 14- membered channels for the uranyl germanate family.
                      The charge density of all known 3D U–Si/Ge–O frameworks
                      has been investigated, which shows strong correlations with
                      chemical composition of corresponding phases. The increase
                      of Si/O (Ge/O) ratios in silicate units results in the
                      decrease of negative charge density. Moreover, the charge
                      density increases with decreasing countercation size within
                      the same Si/O ratio. The correlations can be used to predict
                      inclusion phase formation within U–Si/Ge–O families.
                      Raman spectra of the studied uranyl germanates were
                      measured, and bands were assigned on the basis of structural
                      features.},
      cin          = {IEK-6},
      ddc          = {540},
      cid          = {I:(DE-Juel1)IEK-6-20101013},
      pnm          = {161 - Nuclear Waste Management (POF3-161) / Helmholtz Young
                      Investigators Group: Energy (HGF-YIG-Energy)},
      pid          = {G:(DE-HGF)POF3-161 / G:(DE-HGF)HGF-YIG-Energy},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:30125085},
      UT           = {WOS:000443923700076},
      doi          = {10.1021/acs.inorgchem.8b01781},
      url          = {https://juser.fz-juelich.de/record/852543},
}