Cluster of Clusters: Structure of the 37-Atom Cluster[(p-Tol3P)12Au18Ag19Br11]2⊕ and a Novel Series of Supraclusters Based on Vertex-Sharing Icosahedra

1987 ◽  
Vol 26 (9) ◽  
pp. 897-900 ◽  
Author(s):  
Boon K. Teo ◽  
M. C. Hong ◽  
Hong Zhang ◽  
D. B. Huang
Keyword(s):  
Atom Cluster ◽  
Vertex Sharing ◽  
Cluster Of Clusters

scholarly journals The crystal structure of szenicsite, Cu3MoO4(OH)4

1998 ◽  
Vol 62 (04) ◽  
pp. 461-469 ◽  
Author(s):  
Peter C. Burns
Keyword(s):  
Crystal Structure ◽  
Goodness Of Fit ◽  
Direct Methods ◽  
Ligand Field ◽  
Area Detector ◽  
Vertex Sharing ◽  
Distorted Octahedral ◽  
Jahn Teller ◽  
Jahn Teller Effect ◽  
Least Squares Techniques

Abstract The crystal structure of szenicsite, Cu3MoO4(OH)4, orthorhombic, a = 8.5201(8), b = 12.545(1), c = 6.0794(6) Å, V = 649.8(2) Å3, space group Pnnm, Z = 4, has been solved by direct methods and refined by least-squares techniques to an agreement index (R) of 3.34% and a goodness-of-fit (S) of 1.11 for 686 unique observed [|F| ⩾ 4σF] reflections collected using graphite-monochromated Mo-Kα X-radiation and a CCD area detector. The structure contains three unique Cu2+ positions that are each coordinated by six anions in distorted octahedral arrangements; the distortions of the octahedra are due to the Jahn-Teller effect associated with a d 9 metal in an octahedral ligand-field. The single unique Mo6+ position is tetrahedrally coordinated by four O2− anions. The Cu2+ϕ6 (ϕ: unspecified ligand) octahedra share trans edges to form rutile-like chains, three of which join by the sharing of octahedral edges to form triple chains that are parallel to [001]. The MoO4 tetrahedra are linked to either side of the triple chain of Cu2+ϕ6 octahedra by the sharing of two vertices per tetrahedron, and the resulting chains are cross-linked through tetrahedral-octahedral vertex sharing to form a framework structure. The structure of szenicsite is closely related to that of antlerite, Cu3SO4(OH)4, which contains similar triple chains of edge-sharing Cu2+ϕ6 octahedra.

scholarly journals Reindarstellung und Kristallstruktur von Lithiumnitriddibromid, Li5NBr2 / Preparation and Crystal Structure of Lithium Nitride Dibromide, Li5NBr2

1995 ◽  
Vol 50 (9) ◽  
pp. 1353-1358 ◽  
Author(s):  
Rupert Marx ◽  
Hans Michael Mayer
Keyword(s):  
Single Phase ◽  
Close Packing ◽  
Unit Cell ◽  
Orthorhombic Space Group ◽  
Lithium Nitride ◽  
Neutron Powder Diffraction Data ◽  
Linear Chains ◽  
Vertex Sharing ◽  
Unknown Structure ◽  
Quasi Binary System

AbstractSingle phase Li5NBr2 was prepared by the reaction of Li3N and dry, OH-free LiBr under inert gas at 430 °C. In the quasi-binary system Li3-2xN1-xBrx, Li5NBr2 is the second most nitride rich compound after Li10N3Br. Following unit cell indexing using laboratory X-ray powder data the previously unknown structure of Li5NBr2 was solved from neutron powder diffraction data recorded at the flat-cone and powder diffractometer E2 at the rebuilt reactor BERII in Berlin. The title compound crystallizes in the orthorhombic space group Immm (No. 71), a = 603.79(4), b = 1181.3(1), c = 390.14(3) pm with two formula units per unit cell. The L i-N -sublattice comprises linear chains of vertex sharing Li6N-octahedra which are aligned along the short c-axis and are separated by chains of bromine atoms. The N-Br arrangement may be regarded as an ordered AX2 variant of a cubic close packing involving two kinds of atoms. Lithium atoms occupy the tetrahedral holes formed by one nitrogen and three bromine atoms, as well as the N - N edges of the N2Br2 tetrahedra.

Atom-Cluster

1989 ◽  
Vol 20 (6) ◽  
pp. 172-177 ◽  
Author(s):  
Thomas Lange ◽  
Thorald Bergmann ◽  
Horst Göhlich ◽  
Helmut Schaber ◽  
T. Patrick Martin
Keyword(s):  
Atom Cluster

The Crystal Structure of Cesium Dodecachlorotrirhenate-(III), a Compound with a New Type of Metal Atom Cluster

1963 ◽  
Vol 2 (6) ◽  
pp. 1166-1171 ◽  
Author(s):  
J. A. Bertrand ◽  
F. A. Cotton ◽  
W. A. Dollase
Keyword(s):  
Crystal Structure ◽  
Metal Atom ◽  
Atom Cluster ◽  
New Type

ChemInform Abstract: MIXED-METAL ATOM CLUSTER COMPOUND CONTAINING SILVER(I) AND PLATINUM(II)

1984 ◽  
Vol 15 (30) ◽  
Author(s):  
R. USON ◽  
J. FORNIES ◽  
M. TOMAS ◽  
F. A. COTTON ◽  
L. R. FALVELLO
Keyword(s):  
Metal Atom ◽  
Cluster Compound ◽  
Mixed Metal ◽  
Atom Cluster
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