2018
DOI: 10.1021/acs.inorgchem.8b01072
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Comparison of Uranium(VI) and Thorium(IV) Silicates Synthesized via Mixed Fluxes Techniques

Abstract: Two uranium and two thorium silicates were obtained using high temperature mixed fluxes methods. K(UO)SiO crystallizes in the P2/ c space group and contains open-branched sechser (six) single silicate chains, whereas K(UO)SiO crystallizes in the C2/ c space group and is built of unbranched achter (eight) silicate chains. The crystals of K(UO)SiO and K(UO)SiO are related by increasing U/Si molar ratios, and both structures contain the same secondary building units (SBUs), [USi] heptamers. The triangle diagram f… Show more

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Cited by 12 publications
(5 citation statements)
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“…The structure of K 2 (UO 2 )­GeO 4 consists of the following primary building units (PUBs): one uranyl tetragonal bipyramid, one germanate tetrahedron, and two potassium cations. The UO 6 tetragonal bipyramid displays the typical UO Ur and U–O eq bond distances, which agree well with other inorganic uranyl compounds and are 1.820(4) Å for axial bonds and 2.247(3) Å for equatorial bonds. , The Ge–O bond length in GeO 4 tetrahedra is 1.751(3) Å, and O–Ge–O angles are 106.2(1)° and 116.2(2)°. The two potassium cations are six-fold and eight-fold coordinated, respectively.…”
Section: Resultssupporting
confidence: 77%
“…The structure of K 2 (UO 2 )­GeO 4 consists of the following primary building units (PUBs): one uranyl tetragonal bipyramid, one germanate tetrahedron, and two potassium cations. The UO 6 tetragonal bipyramid displays the typical UO Ur and U–O eq bond distances, which agree well with other inorganic uranyl compounds and are 1.820(4) Å for axial bonds and 2.247(3) Å for equatorial bonds. , The Ge–O bond length in GeO 4 tetrahedra is 1.751(3) Å, and O–Ge–O angles are 106.2(1)° and 116.2(2)°. The two potassium cations are six-fold and eight-fold coordinated, respectively.…”
Section: Resultssupporting
confidence: 77%
“…Condensation of the monomeric tetrahedra via vertex sharing leads to formation of linear [Si8O20] 8− ribbons (Figure 1j) [13][14][15][16][17][18]. As in the previous case, a single structure can host polymeric anions with different compositions and architectures [19]. [19], tubular, and multi-layer chains like…”
Section: Introductionmentioning
confidence: 82%
“…1j) [13][14][15][16][17][18]. As in the previous case, a single structure can host polymeric anions with different compositions and architectures [19].…”
Section: Introductionmentioning
confidence: 87%
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“…For much of their history, the focus was on the investigation of uranyl minerals and the exploration of new materials through ceramic and hydrothermal syntheses, the latter of which resembles the conditions under which most minerals form. In the past decade, the flux growth of uranyl compounds, especially using halide fluxes, has become quite prolific, resulting in many new uranyl silicates, germanates, phosphates, borates, aluminates, and others. ,, …”
Section: Introductionmentioning
confidence: 99%