Nature of isomorphism in crystals of bismuth-zinc and bismuth-cadmium double oxides with the sillenite structure

Кирик, С. Д.; Kutvitskii, V. A.; Koryagina, T. I.

doi:10.1007/bf00754131

Cited by 3 publications

(8 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Refinements of atomic occupancy parameters for these two positions gave the compositions Bi 0.2105(6) Cd 0.7895 (6) and Bi 0.3685 (18) [21], and Bi 3.785 Cd 3.3 Cu 1.775 (PO 4 ) 3.5 O 5.5 [22]. All of our attempts to refine this structure in lower-symmetry space groups with an ordered distribution of Bi and Cd atoms have been unsuccessful.…”

Section: Structure Determinationmentioning

confidence: 89%

“…The emission spectrum was measured on an F-7000 time-resolved fluorescence spectrometer using a Xe lamp at room temperature. (8) O5 0.1505 (7) 0.0967 (7) 0.8842 (9) 0.009 (2) Note: M1 and M2 have the compositions Bi 0.2105(6) Cd 0.7895 (6) and Bi 0.3685 (18) Cd 0.6315 (18) , respectively. U eq is defined as one-third of the trace of the orthogonalized U tensor.…”

Section: Spectral Measurementsmentioning

confidence: 98%

“…1(b)). The former is only occupied by M2 [Bi 0.3685(18) Cd 0.6315 (18) ] atoms, while the latter is filled by M1 [Bi 0.2105(6) Cd 0.7895 (6) ] atoms and B2-centered BO 3 groups simultaneously. The B2-centered BO 3 triangles go through the centers of the channels and are surrounded by M1 atoms.…”

Section: Description Of the Structurementioning

confidence: 99%

“…Note that Bi and Cd atoms are statistically distributed over the two crystallographic sites, M1 [Bi 0.2105(6) Cd 0.7895 (6) ] and M2 [Bi 0.3685 (18) Cd 0.6315 (18) ], which makes electronic structure calculations difficult. In order to perform calculations, we make an assumption that Cd atoms fully occupy M1 and Bi atoms fully occupy M2 sites, which also results in the formula BiCd 3 Al 3 B 4 O 15 .…”

Section: Electronic Structure Calculationsmentioning

confidence: 99%

“…[Bi 0.2105(6) Cd 0.7895(6) ] and M2 [Bi 0.3685(18) Cd 0.6315(18) ]. Among them, M1 has more Cd content and occupies crystallographic general position, while M2 contains relatively more Bi component than M1 and lies on a crystallographic three-fold axis.…”

mentioning

confidence: 99%

See 4 more Smart Citations

Synthesis, crystal structure, spectrum properties, and electronic structure of a novel non-centrosymmetric borate, BiCd3(AlO)3(BO3)4

Chen

Yin

Chang

et al. 2010

Journal of Solid State Chemistry

View full text Add to dashboard Cite

Section: Structure Determinationmentioning

confidence: 89%

Section: Spectral Measurementsmentioning

confidence: 98%

Section: Description Of the Structurementioning

confidence: 99%

Section: Electronic Structure Calculationsmentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Synthesis, crystal structure, spectrum properties, and electronic structure of a novel non-centrosymmetric borate, BiCd3(AlO)3(BO3)4

Chen

Yin

Chang

et al. 2010

Journal of Solid State Chemistry

View full text Add to dashboard Cite

Zur Kristallchemie der Oxometallate des Cadmiums

Müller‐Buschbaum

2009

Zeitschrift anorg allge chemie

View full text Add to dashboard Cite

In oxo/-vanadates, -chromates, -wolframates, -germanates, for example, Cd 2+ appears as cationic part of the crystal structures and shows mainly octahedral coordination by oxygen. It is amazing that CdMoO 4 (Scheelite type) and α-CdUO 4 are containing CdO 8 -polyhedra. The first mentioned compound shows distorted two times capped trigonal CdO 6+2 prisms, in α-CdUO 4 the coordination number eight is realized by CdO 8 -cubes. The only one example of sevenfold coordinated Cd 2+ is CdV 3 O 7 . The compound CaCd 2 Bi 2 Nb 4 O 15 shows in the anionic part of the crystal structure Nb 4 O 15 blocks (allocated to the Aurivillius phases). The NbO 6 -octahedra network corresponds a yet unknown higher Ruddlesden-Popper phase too. The so called oxocadmates are formed by the large alkaline metals and barium. For example

show abstract

A Stoichiometric Model for Sillenites

Valant

Suvorov

2002

Chem. Mater.

View full text Add to dashboard Cite

A critical review of crystallographic studies on sillenite compounds has allowed us to develop a general structural formula for the stoichiometric sillenites: Bi 12 (Bi 4/5-nx M n+ 5x )O 19.2+nx . We defined the stoichiometric sillenites as those with an oxygen sublattice that is fully occupied by either oxygen ions or lone electron pairs of Bi 3+ ions. Nonstoichiometric groups of sillenites were identified as being either substoichiometric, with a deficient oxygen sublattice, or superstoichiometric, with an excess of oxygen. The compositions of the sillenites reported in the literature agree well with the proposed stoichiometric model. Two sillenites, Al and Zn, that were found to deviate from this model were experimentally investigated using X-ray diffraction, scanning electron microscopy, and wavelength-dispersive spectroscopy. The composition was found to be different from that reported previously and to correspond to the proposed stoichiometric model.

show abstract

Nature of isomorphism in crystals of bismuth-zinc and bismuth-cadmium double oxides with the sillenite structure

Cited by 3 publications

References 6 publications

Synthesis, crystal structure, spectrum properties, and electronic structure of a novel non-centrosymmetric borate, BiCd3(AlO)3(BO3)4

Synthesis, crystal structure, spectrum properties, and electronic structure of a novel non-centrosymmetric borate, BiCd3(AlO)3(BO3)4

Zur Kristallchemie der Oxometallate des Cadmiums

A Stoichiometric Model for Sillenites

Contact Info

Product

Resources

About