Mise en évidence d'un nouvel anion à huit atomes de bore dans Tl4[B8O12(OH)4]H2O

Touboul, M.; Bois, Claudette; Amoussou, D.

doi:10.1016/0022-4596(83)90100-7

Cited by 15 publications

(5 citation statements)

References 7 publications

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“…In addition, each K + cation is 10-fold coordinated as shown in Figure b, with the K−O distances varying from 2.776(3) to 3.267(3) Å. Compared with previously reported chainlike borates, such as Ca[B 3 O 4 (OH) 3 ](H 2 O), 1c, KMg 2 H[B 6 O 8 (OH) 5 ] 2 (H 2 O) 4 , 1c, Tl 2 [B 4 O 6 (OH) 2 ]·2H 2 O, Pb 6 B 11 O 18 (OH) 9 ,5c LiB 3 O 5 , Zn[B 3 O 4 (OH) 3 ],5a and M 2 [B 4 O 6 (OH) 2 ]· n H 2 O (M = Li, Na), the stepped chains of 1 and the double helical chains of 2 are very unusual in borates. Especially, a new FFB of B 5 O 10 (OH) 2 7- unit was found in the structure of 1 .…”

Section: Resultsmentioning

confidence: 80%

Two New Potassium Borates, K₄B₁₀O₁₅(OH)₄ with Stepped Chain and KB₅O₇(OH)₂·H₂O with Double Helical Chain

Zhang

Zheng

et al. 2004

Crystal Growth & Design

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Two unusual chainlike potassium borates of K 4 B 10 O 15 (OH) 4 (1) and KB 5 O 7 (OH) 2 ‚H 2 O (2) have been synthesized under mild solvothermal conditions at 170 °C. The structures were determined by single-crystal X-ray diffraction and further characterized by FTIR, powder X-ray diffraction, and thermogravimetric analysis. Compound 1 crystallized in the monoclinic space group C2/c, a ) 18.077(6) Å, b ) 6.857(2) Å, c ) 13.266(4) Å, β ) 95.271(4)°, V ) 1637.4(9) Å 3 , Z ) 4, R ) 0.0234; and compound 2 crystallized in the monoclinic space group P2(1)/c, a ) 9.4824(8) Å, b ) 7.5180(6) Å, c ) 11.4154(6) Å, β ) 97.277(3)°, V ) 807.2(1) Å 3 , Z ) 4, R ) 0.0502. The stepped chains of 1 are built up from corner sharing of B 3 O 5 (OH) 2 3and B 4 O 9 6groups to form new fundamental building blocks (FBBs) of B 5 O 10 (OH) 2 7constructed by corner sharing of one B 3 O 5 (OH) 2 3cluster with a three-membered ring, one BO 3 3unit, and BO 4 5tetrahedron, while the double helical chain of 2 is built up by FBBs of B 5 O 7 (OH) 2 -. Adjacent chains in 1 and 2 are further connected into a 3-D structure by K + cations and H-bonding interactions.

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Section: Resultsmentioning

confidence: 80%

Two New Potassium Borates, K₄B₁₀O₁₅(OH)₄ with Stepped Chain and KB₅O₇(OH)₂·H₂O with Double Helical Chain

Zhang

Zheng

et al. 2004

Crystal Growth & Design

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“…Although a few chain borates such as Na 3 [B 5 O 9 ]·H 2 O, LiB 3 O 5 , LaB 3 O 6 , and Tl 2 [B 4 O 6 (OH) 2 ]·2H 2 Owere discovered previously, none of them are chiral and no coexistence of infinite and finite chains was observed in these compounds.…”

Section: Resultsmentioning

confidence: 99%

A Chiral Lead Borate Containing Infinite and Finite Chains Built up from BO₄ and BO₃ Units

Shi

Jiang

et al. 2002

Chem. Mater.

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With a hydrothermal technique, a novel chiral lead borate (Pb 6 B 11 O 18 (OH) 9 ) has been prepared. The sample has been characterized by powder X-ray diffraction, infrared spectroscopy, energy-dispersive spectroscopy, thermal analysis, and second-harmonic generation powder measurement. The structure of the compound, which crystallizes in the trigonal space group P3 2 with lattice constants a ) 11.7691(7) Å and c ) 13.3361(12) Å has been solved by single-crystal X-ray diffraction analysis. There exist infinite helical chains and finite chain fragments built up from BO 4 and BO 3 units. In the compound the Pb 2+ cations are located in the space between adjacent polyborate anionic chains, compensating the negative charges of the chains. The chiral feature of the lead borate is unique, and because it lacks symmetry center, the compound exhibits distinct NLO properties.

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“…2). Structural resolution led to the formulae TI2B407 9 3H20 [4] and T12B407" 1.5H20 [5]. These compounds contain infinite chains of polyanions [B406(OH)2] 2-and [BsOt2(OH),] 4-, the thallium atomsand the water molecules being localized between these chains 9 Their structural formulae are, respectively, T12[B,O6(OH)2].2H20 and TI,[BsO12(OH),].H20.…”

Section: Thermogravimetrymentioning

confidence: 98%

Correlation between structures and thermal properties of hydrated thallium(I) diborates; H2O-Tl2B4O7 phase diagram

Touboul

Amoussou

1986

Journal of Thermal Analysis

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Two synthetic hydrated thallium(l) diborates have been found in the liquid~.~-solid equilibria of the I00 ~ isotherm of the ternary system H20---B203--TI20; they were characterized via the powder diagrams, but classical chemical analysis does not lead to the correct degree of hydration. Through TG of the powders, a complex process is found with no explanation. Structural resolution and TG of the monocrystals allow a.correct explanation of the thermal dehydration: these thallium(I) diborates are two distinct compounds, TlzB407 9 3H20 and TI2B407 -1.5H20 , which have their own process of dehydration; they contain infinite chains of polyanions and their structural formulae are TI2[B406(OH)2 ].2H20 and TL[BsO~2(OH)4]" H20; the latter polyanion may be considered as the dimer of the first.Tlae H20~T12B407 phase diagram was established by thermal analysis and solubility experiments, both under pressure; it allows the prediction that another hydrated thallium(1) diborate, T12B407. H20, exists, with possible structural formula TIr[B12OIa(OH)6 ]. Actually, only monocrystals of T14[BsO12(OH)4]-H20 have been obtained hydrothermally from TI2[B406(OH)2] "2H20.During establishment of the 100 ~ isotherm of the ternary system H20~B203-T120 [1], the existence of two thallium(l) diborate hydrates became obvious: one with congruent solubility and the other with incongruent solubility and having a very narrow crystallization zone (Fig. 1). Chemical analysis of the solid phases separated from their respective solutions does not allow the exact determination of the degree of hydration; on the other hand, these products were clearly identified by their very different powder diagrams. It therefore became necessary to resort to thermogravimetry (TG) so as to propose plausible chemical formulae.

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Mise en évidence d'un nouvel anion à huit atomes de bore dans Tl4[B8O12(OH)4]H2O

Cited by 15 publications

References 7 publications

Two New Potassium Borates, K₄B₁₀O₁₅(OH)₄ with Stepped Chain and KB₅O₇(OH)₂·H₂O with Double Helical Chain

Two New Potassium Borates, K₄B₁₀O₁₅(OH)₄ with Stepped Chain and KB₅O₇(OH)₂·H₂O with Double Helical Chain

A Chiral Lead Borate Containing Infinite and Finite Chains Built up from BO₄ and BO₃ Units

Correlation between structures and thermal properties of hydrated thallium(I) diborates; H2O-Tl2B4O7 phase diagram

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Mise en évidence d'un nouvel anion à huit atomes de bore dans Tl4[B8O12(OH)4]H2O

Cited by 15 publications

References 7 publications

Two New Potassium Borates, K4B10O15(OH)4 with Stepped Chain and KB5O7(OH)2·H2O with Double Helical Chain

Two New Potassium Borates, K4B10O15(OH)4 with Stepped Chain and KB5O7(OH)2·H2O with Double Helical Chain

A Chiral Lead Borate Containing Infinite and Finite Chains Built up from BO4 and BO3 Units

Correlation between structures and thermal properties of hydrated thallium(I) diborates; H2O-Tl2B4O7 phase diagram

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Product

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Two New Potassium Borates, K₄B₁₀O₁₅(OH)₄ with Stepped Chain and KB₅O₇(OH)₂·H₂O with Double Helical Chain

Two New Potassium Borates, K₄B₁₀O₁₅(OH)₄ with Stepped Chain and KB₅O₇(OH)₂·H₂O with Double Helical Chain

A Chiral Lead Borate Containing Infinite and Finite Chains Built up from BO₄ and BO₃ Units