DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Two-Dimensional Uranyl Borates: From Conventional to Extreme Synthetic Conditions: Two-Dimensional Uranyl Borates: From Conventional to Extreme Synthetic Conditions

Journal Article · · European Journal of Inorganic Chemistry
 [1];  [2];  [3];  [4];  [5]; ORCiD logo [2]
  1. Hefei Univ. (China); OSTI
  2. Forschungszentrum Juelich (Germany). Inst. for Energy and Climate Research (IEK)
  3. Florida State Univ., Tallahassee, FL (United States)
  4. Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Jiangsu (China)
  5. Hefei Univ. (China)

A systematic investigation of uranyl borates under different synthetic conditions resulted in five new 2D compounds, namely, (H3O)[(UO2)(BO3)], Li[(UO2)(BO3)]·(H2O), α-K4[(UO2)5(BO3)2O4], β-K4[(UO2)5(BO3)2O4] and K2.5[(UO2)5(BO3)2O2.5(OH)1.5]·(H2O)2.5. (H3O)[(UO2)(BO3)] and Li[(UO2)(BO3)]·(H2O) were obtained from hydrothermal reactions at 220 °C using the same mineralizer. Both materials possess the uranophane sheet topology with different symmetry of the unit cells. In the structure of (H3O)[(UO2)(BO3)] and Li[(UO2)(BO3)]·(H2O), UO7 pentagonal bipyramids share edges and vertexes with four BO3 planar triangles. α-K4[(UO2)5(BO3)2O4] and β-K4[(UO2)5(BO3)2O4] are polytypes. α-K4[(UO2)5(BO3)2O4] was synthesized from a high-temperature solid-state reaction under ambient pressure; whereas β-K4[(UO2)5(BO3)2O4] was obtained from a high-temperature/high-pressure (HT/HP) reaction. Both structures have an identical anion topology, but β-K4[(UO2)5(BO3)2O4] crystallizes in space group with higher symmetry. In K2.5[(UO2)5(BO3)2O2.5(OH)1.5]·(H2O)2.5, which was obtained from a hydrothermal reaction, UO7 polyhedra share vertexes and edges with two independent BO3 triangles, forming the most complex uranyl borate layers among all five compounds. The different synthetic routes, novel topologies, thermal behavior and Raman spectra are discussed.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Center for Actinide Science & Technology (CAST)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0016568
OSTI ID:
1767535
Journal Information:
European Journal of Inorganic Chemistry, Journal Name: European Journal of Inorganic Chemistry Journal Issue: 4 Vol. 2020; ISSN 1434-1948
Publisher:
ChemPubSoc EuropeCopyright Statement
Country of Publication:
United States
Language:
English

References (35)

Electricity Generation based on One-Dimensional Group-III Nitride Nanomaterials journal March 2010
The Chemistry of the Actinide Elements book December 1985
Evaluation of f-element borate chemistry journal September 2016
Rubidium uranyl phosphates and arsenates with polymeric tetrahedral anions: Syntheses and structures of Rb4[(UO2)6(P2O7)4(H2O)], Rb2[(UO2)3(P2O7)(P4O12)] and Rb[(UO2)2(As3O10)] journal August 2009
Mg3Pt(BO3)2O2: The first platinum borate from the flux technique journal January 2020
Raman spectroscopic characterization of RECa4O(BO3)3 (RE=La and Gd) crystals journal March 2008
Influence of Synthetic Conditions on Chemistry and Structural Properties of Alkaline Earth Uranyl Borates journal September 2016
Divergent Structural Chemistry of Uranyl Borates Obtained from Solid State and Hydrothermal Conditions journal October 2017
Porous Uranyl Borophosphates with Unique Three-Dimensional Open-Framework Structures journal July 2017
Na 2 (UO 2 )(BO 3 ): An All-Uranium(V) Borate Synthesized under Mild Hydrothermal Conditions journal March 2018
Structure−Property Relationships in Lithium, Silver, and Cesium Uranyl Borates journal November 2010
Polarity and Chirality in Uranyl Borates: Insights into Understanding the Vitrification of Nuclear Waste and the Development of Nonlinear Optical Materials journal March 2010
Actinide Carbonte Complexes and Their Importance in Actinide Environmental Chemistry journal January 1995
Crystal Chemistry of the Potassium and Rubidium Uranyl Borate Families Derived from Boric Acid Fluxes journal July 2010
Role of Anions and Reaction Conditions in the Preparation of Uranium(VI), Neptunium(VI), and Plutonium(VI) Borates journal March 2011
Elucidation of Tetraboric Acid with a New Borate Fundamental Building Block in a Chiral Uranyl Fluoroborate journal October 2012
High Structural Complexity of Potassium Uranyl Borates Derived from High-Temperature/High-Pressure Reactions journal April 2013
SrGe 2 B 2 O 8 and Sr 3 Ge 2 B 6 O 16 : Novel Strontium Borogermanates with Three-Dimensional and Layered Anionic Architectures journal November 2013
Further Evidence for the Stabilization of U(V) within a Tetraoxo Core journal May 2014
How are Centrosymmetric and Noncentrosymmetric Structures Achieved in Uranyl Borates? journal March 2010
Understanding the Formation of Salt-Inclusion Phases: An Enhanced Flux Growth Method for the Targeted Synthesis of Salt-Inclusion Cesium Halide Uranyl Silicates journal May 2016
[NC 4 H 12 ] 2 [(UO 2 ) 6 (H 2 O) 2 (SO 4 ) 7 ]: the first organically templated actinide sulfate with a three-dimensional framework structure journal January 2002
Vertex-, face-, point-, Schläfli-, and Delaney-symbols in nets, polyhedra and tilings: recommended terminology journal January 2010
A novel aluminoborate open-framework [In(dien) 2 ][Al 2 B 7 O 16 H 2 ] with large chiral cavities templated by chiral main group metal complexes journal January 2014
PbCd 2 B 6 O 12 and EuZnB 5 O 10 : syntheses, crystal structures and characterizations of two new mixed metal borates journal January 2014
Kinetics vs. thermodynamics: a unique crystal transformation from a uranyl peroxo-nanocluster to a nanoclustered uranyl polyborate journal January 2014
Potassium uranyl borate 3D framework compound resulted from temperature directed hydroborate condensation: structure, spectroscopy, and dissolution studies journal January 2016
Underlying nets in three-periodic coordination polymers: topology, taxonomy and prediction from a computer-aided analysis of the Cambridge Structural Database journal January 2011
Recent progress in actinide borate chemistry journal January 2011
Hexapotassium (cyclo-octahydroxotetracosaoxohexadecarborato)dioxouranate(VI) dodecahydrate, K6[UO2{B16O24(OH)8}].12H2O journal May 1985
Synthèse et structure du tétraborouranate de nickel, Ni7B4UO16 journal July 1989
Bond-valence parameters obtained from a systematic analysis of the Inorganic Crystal Structure Database journal August 1985
Bond-valence parameters for solids journal April 1991
U6+ Minerals and Inorganic Compounds: Insights into an Expanded Structural Hierarchy of Crystal Structures journal December 2005
A Revised and Expanded Structure Hierarchy of Natural and Synthetic Hexavalent Uranium Compounds journal January 2016