ChemInform Abstract: Crystal Structure of Lithium Perrhenate Sesquihydrate.

Хрусталев, В. Н.; Varfolomeev, M. B.; Shamrai, N. B.; Lindeman, S. V.; Struchkov, Yu. T.

doi:10.1002/chin.199533004

Cited by 4 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…; tetrahedra is approximately the same observed for rare-earth perrhenates, transition metal perrhenates and earth alkaline perhenates [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] The dependence of coordination number upon the Pauling`s ionic radii 21 observed for the central cation in this case, agrees with the relationship for other related compounds. Namely, when the ionic radius of the metal lays in the range 0.6Å to 0.8Å the coordination number is 6 and when the ionic radii lays in the range 1.00Å to 1.20Å the coordination number is 9.…”

Section: The Mean Bond Length D(re−o) = 172 Pm In Reo4supporting

confidence: 82%

“…In these perrhenates, the coordination number of the central cation depends mainly on the size of the 3+ ion. This dependence is also observed for many others compounds based on perrhenate as a ligand, including alkalines-earth metals, transition metals and rare-earth ions as central cation [6][7][8][9][10][11][12][13][14][15][16][17][18] . All of them with oxidation states 2+ or 3+.…”

Section: Introductionmentioning

confidence: 74%

See 1 more Smart Citation

CRYSTAL STRUCTURE OF A NEW BISMUTH PERRHENATE Bi(Re0(4))3H(2)0

Mujica

Llanos

Sánchez

et al. 2008

J. Chil. Chem. Soc.

View full text Add to dashboard Cite

Monoaquatris(tetraoxorhenate (VII)) bismuth(III), Bi(ReO 4 ) 3 (H 2 O) was prepared by reaction of (BiO) 2 CO 3 /Bi 2 (CO 3 ) 3 with concentrated HReO 4 at room temperature. The pale yellow compound crystallize triclinic in the space group P1;, (No. 2); with two formula units per unit cell (a = 746.0(1) pm, b = 777.1(2) pm, c = 990.5(2) pm, α = 100.99(3)°, β = 99.88(3)°, γ = 100.17(3)° ). The main feature of the crystal structure is a distorted bicapped trigonal prism of Bi[(ReO 4 ) 3/2 (ReO 4 ) 2/2 (ReO 4 ) 2/2 (H 2 O)], which are connected each other through [ReO 4 ]-tetrahedra to form a three-dimensional network. In the titled compound, the cation Bi 3+ is eightfold coordinated which agree with the tendency observed in other compounds of the family.

show abstract

Section: The Mean Bond Length D(re−o) = 172 Pm In Reo4supporting

confidence: 82%

Section: Introductionmentioning

confidence: 74%

CRYSTAL STRUCTURE OF A NEW BISMUTH PERRHENATE Bi(Re0(4))3H(2)0

Mujica

Llanos

Sánchez

et al. 2008

J. Chil. Chem. Soc.

View full text Add to dashboard Cite

show abstract

“…LiTcO 4 was proposed by Keller and Kanellakopulos to be isostructural to LiReO 4 . The perrhenate compound has reported hydrated and dehydrated forms, with the number of water molecules per formula unit equaling 0 (refs and ; space group P 1̅ per Betz and Hoppe), 1 (refs and ; space group P 2 1 / a per Abakumov et al), 1.5 (refs – ; space group P 2 1 / c per Khrustalev et al), and 2 (refs and ; space group not determined). In the Tc system, crystals with water molecules per formula unit have been reported as 0 (refs , , and ; reportedly isostructural with LiReO 4 ), 2 (ref ; reportedly isostructural with LiReO 4 ·2H 2 O), and 3 (space group P 6 3 / mc according to Maruk et al).…”

Section: Resultsmentioning

confidence: 99%

Chemical Trends in Solid Alkali Pertechnetates

et al. 2017

View full text Add to dashboard Cite

Insight into the solid-state chemistry of pure technetium-99 (Tc) oxides is required in the development of a robust immobilization and disposal system for nuclear waste stemming from the radiopharmaceutical industry, from the production of nuclear weapons, and from spent nuclear fuel. However, because of its radiotoxicity and the subsequent requirement of special facilities and handling procedures for research, only a few studies have been completed, many of which are over 20 years old. In this study, we report the synthesis of pure alkali pertechnetates (sodium, potassium, rubidium, and cesium) and analysis of these compounds by Raman spectroscopy, X-ray absorption spectroscopy (XANES and EXAFS), solid-state nuclear magnetic resonance (static and magic angle spinning), and neutron diffraction. The structures and spectral signatures of these compounds will aid in refining the understanding of Tc incorporation into and release from nuclear waste glasses. NaTcO shows aspects of the relatively higher electronegativity of the Na atom, resulting in large distortions of the pertechnetate tetrahedron and deshielding of the Tc nucleus relative to the aqueous TcO. At the other extreme, the large Cs and Rb atoms interact only weakly with the pertechnetate, have closer to perfect tetrahedral symmetry at the Tc atom, and have very similar vibrational spectra, even though the crystal structure of CsTcO is orthorhombic while that of RbTcO is tetragonal. Further trends are observed in the cell volume and quadrupolar coupling constant.

show abstract

“…The crystal structure of europium(III) perchlorate Eu[ClO 4 ] 3 , represents a topotactically peroxidized example of the UCl 3 ‐type structure of EuCl 3 (hexagonal, P 6 3 / m ) by transforming spherical Cl – into tetrahedral [ClO 4 ] – anions and the ytterbium(III) perrhenate Yb[ReO 4 ] 3 crystallizes isotypically. Like sodium derivatives of UCl 3 tend to form stuffed variants of the mother structure (e.g.…”

Section: Resultsmentioning

confidence: 99%

Single Crystals of CaNa[ReO₄]₃: Serendipitous Formation and Systematic Characterization

Conrad

Schleid

2019

Zeitschrift anorg allge chemie

View full text Add to dashboard Cite

In an attempt to crystallize Ce[ReO4]4·xH2O from aqueous solutions of equimolar amounts of Ce[SO4]2 and Ba[ReO4]2 via salt‐metathesis the serendipitous formation of colorless, transparent, rod‐shaped single crystals of CaNa[ReO4]3 was observed as a result of calcium and sodium impurities within the improperly deionized water used. Structure analysis by X‐ray diffraction lead to the conclusion that the title compound crystallizes in the ThCd[MoO4]3 structure type with the hexagonal space group P63/m and the lattice parameters a = 991.74(6) pm, c = 636.53(4) pm, c/a = 0.642 for Z = 2. The crystal structure contains purely oxygen surrounded and crystallographically unique cations, namely Ca2+ in tricapped trigonal prismatic (d(Ca–O) = 6 × 249 pm + 3 × 254 pm), Na+ in octahedral (d(Na–O) = 6 × 241 pm), and Re7+ in tetrahedral coordination (d(Re–O) = 171–173 pm). Furthermore, it was possible to yield an almost phase‐pure microcrystalline powder of the title compound from a melt of equimolar amounts of Na[ReO4] and Ca[ReO4]2 stemming from aquatically obtained precursors.

show abstract

ChemInform Abstract: Crystal Structure of Lithium Perrhenate Sesquihydrate.

Cited by 4 publications

References 0 publications

CRYSTAL STRUCTURE OF A NEW BISMUTH PERRHENATE Bi(Re0(4))3H(2)0

CRYSTAL STRUCTURE OF A NEW BISMUTH PERRHENATE Bi(Re0(4))3H(2)0

Chemical Trends in Solid Alkali Pertechnetates

Single Crystals of CaNa[ReO₄]₃: Serendipitous Formation and Systematic Characterization

Contact Info

Product

Resources

About

ChemInform Abstract: Crystal Structure of Lithium Perrhenate Sesquihydrate.

Cited by 4 publications

References 0 publications

CRYSTAL STRUCTURE OF A NEW BISMUTH PERRHENATE Bi(Re0(4))3H(2)0

CRYSTAL STRUCTURE OF A NEW BISMUTH PERRHENATE Bi(Re0(4))3H(2)0

Chemical Trends in Solid Alkali Pertechnetates

Single Crystals of CaNa[ReO4]3: Serendipitous Formation and Systematic Characterization

Contact Info

Product

Resources

About

Single Crystals of CaNa[ReO₄]₃: Serendipitous Formation and Systematic Characterization