Structure and bonding model for Na2Tl

Hansen, David; Smith, J. F.

doi:10.1107/s0365110x67001653

Cited by 64 publications

(33 citation statements)

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“…Abstande und Winkel in der Kristallstruktur der Verbindung NazsIni4Snrs (Abstande in [pm], Winkel in ["I aus Rtjntgenbeugungsdaten) Die Standardabweichungen betragen fur d(Na-Na)< 3,l pm, < 0,6 pm, d(Sn-Sn) < 0,6 pm, d(Na-In) < 2,7 pm, d(Na-Sn) < 2,7 pm, d(1n-Sn) < 0,6 pm und fur die Winkelangaben…”

unclassified

Darstellung und Kristallstruktur von Na₂₈In₁₄Sn₁₅

Blase

Cordier

Vogt

1991

Zeitschrift anorg allge chemie

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unclassified

Darstellung und Kristallstruktur von Na₂₈In₁₄Sn₁₅

Blase

Cordier

Vogt

1991

Zeitschrift anorg allge chemie

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“…It should be also stressed that the tetrahedral structure of pseudo-phosphorus can be obtained not only by elements of the Group 14, like in Na 4 Si 4 , where [Si 4 ] 4À tetrahedra convert into É-P 4 molecules, but also in compounds of the Group 13 elements such as Na 2 In (Sevov & Corbett, 1993) and Na 2 Tl (Hansen & Smith, 1967). In our case, however, we are applying the same principle to the lighter B atoms (also Group 13), so converted it into É-N 4 .…”

Section: Application Of the Extended Zintl-klemm Concept To Ag 16 [B mentioning

confidence: 99%

A re-interpretation of the structure of the silver borate, Ag₁₆B₄O₁₀, in the light of the extended Zintl–Klemm concept

Molina

Jenkins

2020

Acta Crystallogr B Struct Sci Cryst Eng Mater

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The borate Ag16B4O10 was synthesized at high temperature and at elevated oxygen pressures [Kovalevskiy et al. (2020). Chem. Sci. 11, 962–969]. Its structure consists of [B4O10]8− polyanions (isostructural to P4O10) embedded in an Ag matrix. According to the standard valences Ag+, B3+ and O2−, the formula has an excess of eight e− which the above authors proposed were located, pairwise, in four Ag4 tetrahedra within the silver substructure. That conclusion was based on the semiconducting and diamagnetic properties, as well as the very small `attractors' of the Electron Localization Function (ELF) found at the centre of these Ag4 tetrahedra. However, a large overlap of the projected density of states (DOS) of silver and oxygen indicated possible dispersion interactions between both atomic species. In this article, an alternative description is proposed based on the extended Zintl–Klemm concept. The anion [B4O10]8− can be formulated as Ψ-[N4O10] P4O10, if it is assumed that the eight e− are transferred to the four B atoms, so converting them into Ψ-N, this then makes sense of its similarity with P4O10, [N4(CH2)6], adamantane and tetraisopropyladamantane. When the Ag atoms connect to the O atoms, they arrange as the H atoms do in hexamethylenetetramine (HMTA). If the two lone pairs of each of the bridging O atoms in Ψ-[N4O10] are equated to the C—H bonds in HMTA, then, this same equivalence exists between the C—H bonds and the O—Ag bonds in the compound Ag16B4O10. The 24 Ag atoms surrounding each [B4O10]8− group prolong the sphalerite structure of the borate anion by means of Ag—O bonds which also fit the sphalerite structure formed of AgO. The eight excess electrons might then be distributed between the Ag and the O atoms, so making sense of the mixing of the Ag and O states. The Ag atoms bonded to the O atoms of the [B4O10]8− groups form a coat that interconnects the borate anions through Ag—O bonds. To establish the validity of this new proposal, the study needs to be extended to the compound Ag3B5O9.

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“…Na 2 In [17] and Na 2 Tl [18]) and in the alkaline earth compounds Ba 8 Ga 7 , Sr 8 Ga 7 and Sr 8 Al 7 [19], in the latter together with [M 3 ] triangles. As depicted in Fig.…”

Section: General Structure Descriptionmentioning

confidence: 99%

Novel intermetallics with the Ca11 Ga7 structure type

Wendorff¹,

Röhr²

2008

Journal of Alloys and Compounds

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Structure and bonding model for Na2Tl

Cited by 64 publications

References 13 publications

Darstellung und Kristallstruktur von Na₂₈In₁₄Sn₁₅

Darstellung und Kristallstruktur von Na₂₈In₁₄Sn₁₅

A re-interpretation of the structure of the silver borate, Ag₁₆B₄O₁₀, in the light of the extended Zintl–Klemm concept

Novel intermetallics with the Ca11 Ga7 structure type

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Structure and bonding model for Na2Tl

Cited by 64 publications

References 13 publications

Darstellung und Kristallstruktur von Na28In14Sn15

Darstellung und Kristallstruktur von Na28In14Sn15

A re-interpretation of the structure of the silver borate, Ag16B4O10, in the light of the extended Zintl–Klemm concept

Novel intermetallics with the Ca11 Ga7 structure type

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Darstellung und Kristallstruktur von Na₂₈In₁₄Sn₁₅

Darstellung und Kristallstruktur von Na₂₈In₁₄Sn₁₅

A re-interpretation of the structure of the silver borate, Ag₁₆B₄O₁₀, in the light of the extended Zintl–Klemm concept