Synthese und Struktur von K2Au3, einer neuen Phase im System Kalium—Gold / Synthesis and Structure of K2Au3, a New Phase in the System Potassium —Gold

Krieger-Beck, Petra; Brodbeck, A.; Strähle, Joachim

doi:10.1515/znb-1989-0223

Cited by 27 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This leads to the formation of layers {CoB 2 } separated by W atoms. A different situation is observed in K 2 Au 3 and Ca 2 GaCu 2 . , The Au2 and Cu atoms form a continuous chain along [010] with alternating short and long distances, d 1 (Au2–Au2) = 2.68 Å, and the longest distance is d 2 (Au2–Au2) = 2.76 Å, respectively. In Ca 2 GaCu 2 , these two distances are 2.70 and 2.78 Å, respectively.…”

Section: Resultsmentioning

confidence: 99%

Mg₃Pt₂: Anionic Chains in a Eu₃Ga₂-Type Structure

et al. 2021

View full text Add to dashboard Cite

The binary phase Mg 3 Pt 2 was prepared by direct reaction between the elements or by spark-plasma synthesis starting with MgH 2 and PtCl 2 . The compound crystallizes in the monoclinic space group C 2/ c with a = 7.2096(3) Å, b = 7.1912(4) Å, c = 6.8977(3) Å, and β = 106.072(3)° and is isotypic to Eu 3 Ga 2 . Analysis of the electron density within the quantum theory of atoms in molecules shows a significant charge transfer from Mg to Pt in agreement with the electronegativity difference. Further study of the chemical bonding with the electron localizability approach reveals the formation of Pt chains stabilized by a complex system of multicenter interactions involving Mg and Pt species. The metallic character of Mg 3 Pt 2 is confirmed by electronic structure calculations and physical measurements.

show abstract

Section: Resultsmentioning

confidence: 99%

Mg₃Pt₂: Anionic Chains in a Eu₃Ga₂-Type Structure

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Proceeding through the series from LiAu to CsAu, a metal−insulator transition occurs between KAu and RbAu . The insulating CsAu and RbAu crystallize in the cubic CsCl structure, whereas the structures of the metallic NaAu and KAu are more complicated and are still not fully elucidated. − Solid CsAu possesses an indirect band gap of 2.6 eV, which can only be modeled when relativistic effects are included in band-structure calculations. , NaAu has been synthesized by precipitation from liquid ammonia solutions and observed in rapidly quenched alloys. − It has a metallic appearance and retains some gold color with the electrical conductivity lying in the metallic range …”

Section: Introductionmentioning

confidence: 99%

A Photoelectron Spectroscopic and Computational Study of Sodium Auride Clusters, Na_nAu_n^- (n = 1−3)

et al. 2007

View full text Add to dashboard Cite

Negatively charged sodium auride clusters, NanAun- (n = 1-3), have been investigated experimentally using photoelectron spectroscopy and ab initio calculations. Well-resolved electronic transitions were observed in the photoelectron spectra of NanAun- (n = 1-3) at several photon energies. Very large band gaps were observed in the photoelectron spectra of the anion clusters, indicating that the corresponding neutral clusters are stable closed-shell species. Calculations show that the global minimum of Na2Au2- is a quasi-linear species with Cs symmetry. A planar isomer of D2h symmetry is found to be 0.137 eV higher in energy. The two lowest energy isomers of Na3Au3- consist of three-dimensional structures of Cs symmetry. The global minimum of Na3Au3- has a bent-flake structure lying 0.077 eV below a more compact structure. The global minima of the sodium auride clusters are confirmed by the good agreement between the calculated electron detachment energies of the anions and the measured photoelectron spectra. The global minima of neutral Na2Au2 and Na3Au3 are found to possess higher symmetries with a planar four-membered ring (D2h) and a six-membered ring (D3h) structure, respectively. The chemical bonding in the sodium auride clusters is found to be highly ionic with Au acting as the electron acceptor.

show abstract

“…Die Kalium±Gold und ±Blei-Absta È nde sind ku È rzer als die Summe der Metallradien [16]. Vergleichbare Absta È nde werden auch in den Verbindungen K 2 Au 3 [17], KAu 2 [18], KAu 5 [19] und KPb [14] beobachtet.…”

Section: Darstellungunclassified

K3Au5Pb: eine Schichtstruktur mit∞2[AuAu3/2]-Gold-Tetraedern und∞1[Pb2/2]-Blei-Ketten

Zachwieja¹,

Wlodarski²

1998

Z. anorg. allg. Chem.

View full text Add to dashboard Cite

Silberfarbene, spröde Einkristalle von K3Au5Pb wurden durch Umsetzung von Kaliumazid mit Goldschwamm und Bleipulver bei T = 920 K synthetisiert. Die Struktur der Verbindung (Raumgruppe Imma, Z = 4, a = 5,646(1) Å, b = 19,500(4) Å, c = 8,412(1) Å) wurde aus Röntgen‐Einkristall‐Diffraktometerdaten bestimmt. Die Gold–Blei‐Partialstruktur besteht aus ∞2[AuAu3/2]‐Tetraeder‐Schichten und ∞1[Pb2/2]‐Zickzack‐Ketten mit vierbindigen Bleiatomen, die über Au–Pb‐Kontakte zu einer Gerüststruktur verbunden werden. Die Kaliumatome befinden sich in kanalartigen Hohlräumen der Gold–Blei‐Partialstruktur.

show abstract

Synthese und Struktur von K₂Au₃, einer neuen Phase im System Kalium—Gold / Synthesis and Structure of K₂Au₃, a New Phase in the System Potassium —Gold

Cited by 27 publications

References 0 publications

Mg₃Pt₂: Anionic Chains in a Eu₃Ga₂-Type Structure

Mg₃Pt₂: Anionic Chains in a Eu₃Ga₂-Type Structure

A Photoelectron Spectroscopic and Computational Study of Sodium Auride Clusters, Na_nAu_n^- (n = 1−3)

K3Au5Pb: eine Schichtstruktur mit∞2[AuAu3/2]-Gold-Tetraedern und∞1[Pb2/2]-Blei-Ketten

Contact Info

Product

Resources

About

Synthese und Struktur von K2Au3, einer neuen Phase im System Kalium—Gold / Synthesis and Structure of K2Au3, a New Phase in the System Potassium —Gold

Cited by 27 publications

References 0 publications

Mg3Pt2: Anionic Chains in a Eu3Ga2-Type Structure

Mg3Pt2: Anionic Chains in a Eu3Ga2-Type Structure

A Photoelectron Spectroscopic and Computational Study of Sodium Auride Clusters, NanAun- (n = 1−3)

K3Au5Pb: eine Schichtstruktur mit∞2[AuAu3/2]-Gold-Tetraedern und∞1[Pb2/2]-Blei-Ketten

Contact Info

Product

Resources

About

Synthese und Struktur von K₂Au₃, einer neuen Phase im System Kalium—Gold / Synthesis and Structure of K₂Au₃, a New Phase in the System Potassium —Gold

Mg₃Pt₂: Anionic Chains in a Eu₃Ga₂-Type Structure

Mg₃Pt₂: Anionic Chains in a Eu₃Ga₂-Type Structure

A Photoelectron Spectroscopic and Computational Study of Sodium Auride Clusters, Na_nAu_n^- (n = 1−3)