Synthesis and crystal structure of new carbonate NaPb2(CO3)2(OH)

Белоконева, Е. Л.; Al-Ama, A. G.; Димитрова, О. В.; Kurazhkovskaya, V. S.; Stefanovich, S. Yu.

doi:10.1134/1.1466495

Cited by 32 publications

(48 citation statements)

References 10 publications

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“…Four of the bond lengths are typical of average Pb-O bond lengths [21,22], while the other three bonds are longer than expected (from 2.769(5) to 2.894(4) Å ). If these three longer distances are considered to be a weak-bonding interaction, then the coordination environment around Pb should be described as a distorted seven coordinate polyhedron.…”

Section: Crystal Structure Of Pb 2 Cub 2 Omentioning

confidence: 96%

Synthesis, structure and properties of Pb2CuB2O6

Pan

Smit

Marvel

et al. 2006

Materials Research Bulletin

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Single crystals of Pb 2 CuB 2 O 6 were grown from a PbO/CuO/B 2 O 3 flux, and crystallize in a monoclinic cell of dimensions a = 5.6311(6), b = 8.7628(9), c = 6.2025(6) Å , and b = 115.7060(10)8 with Z = 2; the space group is P2 1 /c (no. 14). The structure was determined from 662 unique reflections and refined to the final residuals R 1 = 0.0217, wR 2 = 0.0586. The structure is characterized by the two-dimensional layer of interconnected rectangular planar CuO 4 and triangular planar BO 3 groups. The results of quantitative analysis ICP, DTA, vibrational spectroscopy, and magnetic investigations are also presented. #

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Section: Crystal Structure Of Pb 2 Cub 2 Omentioning

confidence: 96%

Synthesis, structure and properties of Pb2CuB2O6

Pan

Smit

Marvel

et al. 2006

Materials Research Bulletin

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“…Besides alkali metals and alkaline-earth metals , rare-earth elements become highlighted with being introduced into the borate system in order to obtain multifunctional materials with the distinctive luminescence properties of rare-earth elements. Belokoneva et al (2002) claimed that Ln(B 4 O 6 (OH) 2 )Cl (Ln = Pr, Nd) exhibits excellent nonlinear optical properties. But the atomic coordinates of its cerium analogue have not been reported until now.…”

Section: Commentmentioning

confidence: 99%

Cerium(III) dihydroxidohexaoxidotetraborate chloride

et al. 2012

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The crystal structure of the title compound, Ce[B4O6(OH)2]Cl, is built from polyborate sheets parallel to the (001) plane. These sheets stack along the [001] direction and are linked by Ce atoms exhibiting an CeO8Cl2 coordination sphere. O—H⋯O and O—H⋯Cl hydrogen bonds additionally stabilize the structural set-up. The polyborate sheet is made up of zigzag borate chains running along the [10] direction. These zigzag chains are interconnected by shared O-vertices, resulting in a two-dimensional layer with nine-membered rings. All B and O atoms (except for the terminal OH atoms) lie in the nearly planar sheets of polyborates, leading to their isotropic atomic displacement parameters being significantly smaller than usual. This may be attributed to the fact that the atomic displacement parameters correlate not only with their atomic masses but with their coordination environments also.

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“…Thus, we may conclude that the role of distortion of the complicate anionic B-O radical in borates discussed here is not so much important as compared to the role played by the extra framework atoms (large cations and anions) and its specifical chemical bonds in crystals. (Table 1) were investigated first for Pr, Nd [24] and than for La, Ce. Their formally tetraborate structure with the block 4[2T+2Δ] possesses a polar layer (Fig.6a) which is topologically close to the layer in pentaborates with the block 5[2T+3Δ] in the absence of a terminal BO 3 -triangle, showed with dashed lines in figure 6b.…”

Section: Fig 3 Hilgardite Family (A) Camentioning

confidence: 99%

Systematic, properties, and structure predictions of new borate materials

Белоконева¹

2008

Cryst. Res. Technol.

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New borates with the non-linear optical properties, obtained and investigated in Moscow State University in the last years, are reviewed. The positions of compounds in systematic were determined including complicate cases using topology and symmetry analysis of anionic radicals with the separation of blocks, typical for borate groups. Such approach revealed structural correlations between borates and silicates and led to prediction of new structures, two of which are realized. The origin of properties is connected with the highly polarizable electron density on lone pair or asymmetric bonds, presented in the structures. Experimental observation electron density distrubution has been made for Pb-hilgardite, a crystal with the high optical nonlinearity. Different approaches to the structure-properties relation are discussed. Dedicated to Prof. Ladislav Bohatý on the occasion of his 60th birthday

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Synthesis and crystal structure of new carbonate NaPb2(CO3)2(OH)

Cited by 32 publications

References 10 publications

Synthesis, structure and properties of Pb2CuB2O6

Synthesis, structure and properties of Pb2CuB2O6

Cerium(III) dihydroxidohexaoxidotetraborate chloride

Systematic, properties, and structure predictions of new borate materials

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