X-Ray crystal structure of two new mixed-valence copper cyanide complexes: unusual bi-co-ordinated copper(I) atoms in polymeric networks

1980 ◽  
pp. 1116 ◽  
Author(s):  
Charles Kappenstein ◽  
Ulrich Schubert
Keyword(s):  
Crystal Structure ◽  
Mixed Valence ◽  
Copper Cyanide ◽  
X Ray ◽  
Polymeric Networks ◽  
Cyanide Complexes

Gemischtvalente Oxovanadate, I Ein neuer Strukturtyp für die Verbindung BaV10O15/Oxovanadates with Mixed Valence, I A New Crystal Structure of BaV10O15

1980 ◽  
Vol 35 (6) ◽  
pp. 669-671 ◽  
Author(s):  
D. Chales de Beaulieu ◽  
Hk. Müller-Buschbaum
Keyword(s):  
Crystal Structure ◽  
Mixed Valence ◽  
Structure Type ◽  
Orthorhombic Symmetry ◽  
Temperature Reaction ◽  
X Ray ◽  
High Temperature Reaction ◽  
Group D ◽  
Symmetry Space ◽  
Symmetry Space Group

Abstract BaV10O15 was prepared by high temperature reaction of BaO and V2O3 in H2-atmosphere (T > 1800°). X-ray investigations of single crystals show a new structure type with octa-hedral coordination of V3+/V2+ (statistical distribution) and cuboctahedral surrounding of Ba2+ . Orthorhombic symmetry, space group D182h-Ccmb, a = 995,8; b = 1161,8; c = 941,0; Z = 4.

The crystal structures of the mixed-valence tellurium oxysalts tlapallite, (Ca,Pb)3CaCu6[Te4+3Te6+O12]2(Te4+O3)2(SO4)2·3H2O, and carlfriesite, CaTe4+2Te6+O8

2019 ◽  
Vol 83 (4) ◽  
pp. 539-549 ◽  
Author(s):  
Owen P. Missen ◽  
Anthony R. Kampf ◽  
Stuart J. Mills ◽  
Robert M. Housley ◽  
John Spratt ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Mixed Valence ◽  
Oxidation States ◽  
Structural Refinement ◽  
X Ray Diffraction ◽  
X Ray ◽  
Naturally Occurring ◽  
The One ◽  
Micro Analysis ◽  
Secondary Bonding

ABSTRACTThe crystal structure of tlapallite has been determined using single-crystal X-ray diffraction and supported by electron probe micro-analysis, powder diffraction and Raman spectroscopy. Tlapallite is trigonal, space groupP321, witha= 9.1219(17) Å,c= 11.9320(9) Å andV= 859.8(3) Å3, and was refined toR1= 0.0296 for 786 reflections withI> 2σ(I). This study resulted from the discovery of well-crystallised tlapallite at the Wildcat prospect, Utah, USA. The chemical formula of tlapallite has been revised to (Ca,Pb)3CaCu6[Te4+3Te6+O12]2(Te4+O3)2(SO4)2·3H2O, or more simply (Ca,Pb)3CaCu6Te4+8Te6+2O30(SO4)2·3H2O, from H6(Ca,Pb)2(Cu,Zn)3(TeO3)4(TeO6)(SO4). The tlapallite structure consists of layers containing distorted Cu2+O6octahedra, Te6+O6octahedra and Te4+O4disphenoids (which together form the new mixed-valence phyllotellurate anion [Te4+3Te6+O12]12−), Te4+O3trigonal pyramids and CaO8polyhedra. SO4tetrahedra, Ca(H2O)3O6polyhedra and H2O groups fill the space between the layers. Tlapallite is only the second naturally occurring compound containing tellurium in both the 4+and 6+oxidation states with a known crystal structure, the other being carlfriesite, CaTe4+2Te6+O8. Carlfriesite is the predominant secondary tellurium mineral at the Wildcat prospect. We also present an updated structure for carlfriesite, which has been refined toR1= 0.0230 for 874 reflections withI> 2σ(I). This updated structural refinement improves upon the one reported previously by refining all atoms anisotropically and presenting models of bond valence and Te4+secondary bonding.

Oxotitanate mit gemischter Valenz, III Zur Kenntnis von BaTi8O16 / Oxotitanates with Mixed Valence, III About BaTi8O16

1980 ◽  
Vol 35 (3) ◽  
pp. 332-334 ◽  
Author(s):  
J. Schmachtel ◽  
Hk. Müller- Buschbaum
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Mixed Valence ◽  
Vacuum Furnace ◽  
Monoclinic Symmetry ◽  
Unknown Compound ◽  
Space Group ◽  
X Ray

The hitherto unknown compound BaTi8O16 was prepared by heating a mixture of BaO:TiO2 = 1:4 in a vacuum furnace to 1400 °C (Ti crucible).Single crystal X-ray investigations show monoclinic symmetry (a = 1420,9, b = 297,1, c = 998,1 pm, β = 133,50°; space group C23-C2). The crystal structure was found to be isotypic to α-MnO2.

Mixed-valence complexes containing the Rh25+ core. X-ray crystal structure of the dimer-of-dimers [Rh2(form)2(O2CCF3)3-(AgO2CCF3)2]2 (form=N, N′-di-p-tolylformamidinate anion)

1992 ◽  
Vol 197 (1) ◽  
pp. 9-14 ◽  
Author(s):  
Giuseppe Bruno ◽  
Giuseppe Tresoldi ◽  
Sandra Lo Schiavo ◽  
Sergio Sergi ◽  
Pasquale Piraino
Keyword(s):  
Crystal Structure ◽  
Mixed Valence ◽  
X Ray
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