Hydrothermal synthesis, crystal structure, and characterization of a new pseudo-two-dimensional uranyl oxyfluoride, [N(C2H5)(4)](2)[(UO2)(4)(OH2)(3)F-10]

Journal article

A new uranyl oxyfluoride, [N(C2H5)4]2[(UO2)4(OH2)3F10] has been synthesized by a hydrothermal reaction technique using (C2H5)4NBr, UO2(OCOCH3)2·2H2O, and HF as reagents. The structure of [N(C2H5)4]2[(UO2)4(OH2)3F10] has been determined by a single-crystal X-ray diffraction technique. [N(C2H5)4]2[(UO2)4(OH2)3F10] crystallizes in the monoclinic space group P21/n (No. 14), with a = 13.852 (3) Å, b = 15.532 (3) Å, c = 16.481 (3) Å, β = 98.88 (3) °, V = 3503.4 (12) Å3, and Z = 4. [N(C2H5)4]2[(UO2)4(OH2)3F10] reveals a novel pseudo-two-dimensional crystal structure that is composed of UO2F5, UO3F4, and UO4F3 pentagonal bipyramids. Each uranyl pentagonal bipyramid shares edges and corners through F atoms to form a six-membered ring. The rings are further interconnected to generate infinite strips running along the b-axis. [N(C2H5)4]2[(UO2)4(OH2)3F10] has been further characterized by elemental analysis, bond valence calculations, Infrared and Raman spectroscopy, and thermogravimetric analysis. © 2006 Elsevier Inc. All rights reserved.

Authors: Ok, K; O'Hare, D

• Publication status: Published
• Journal: JOURNAL OF SOLID STATE CHEMISTRY
• Volume: 180
• Issue: 2
• Pages: 446-452
• Publication date: 2007-02-01
• DOI: 10.1016/j.jssc.2006.11.004
• EISSN: 1095-726X
• ISSN: 0022-4596
• Language: English
• Keywords: uranyl oxyfluoride; pseudo-two-dimensional structure; synthesis