ChemInform Abstract: Crystal Structure of Potassium Sodium Heptahydrogen Hexamolybdocobaltate(III) Octahydrate: An Extra-Protonated B-Series Anderson-Type Heteropolyoxidometalate.

ChemInform ◽  
2015 ◽  
Vol 46 (47) ◽  
pp. no-no
Author(s):  
Ki-Min Park ◽  
Hea-Chung Joo ◽  
Uk Lee
Keyword(s):  
Crystal Structure ◽  
Potassium Sodium

scholarly journals Crystal structure of KNaCuP2O7, a new member of the diphosphate family

2018 ◽  
Vol 74 (2) ◽  
pp. 109-112 ◽  
Author(s):  
Ines Fitouri ◽  
Habib Boughzala
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Charge Distribution ◽  
Structural Model ◽  
Interlayer Space ◽  
Structure Type ◽  
Solid State Reactions ◽  
Space Group ◽  
Potassium Sodium ◽  
Bond Valence Sum

Potassium sodium copper(II) diphosphate(V), KNaCuP2O7, was synthesized by solid-state reactions. It crystallizes in the α-Na2CuP2O7 structure type in space group P21/n. In the crystal, CuO5 square-pyramids are linked to nearly eclipsed P2O7 groups by sharing corners to build up corrugated layers with composition [CuP2O7]2− that extend parallel to (010). The K+ and Na+ cations reside in the interlayer space and are connected to nine and seven O atoms, respectively. The structural model was validated by bond-valence-sum (BVS) and charge-distribution (CHARDI) analysis.

Darstellung und Kristallstruktur von KNaO und RbNaO / Preparation and Crystal Structure of KNaO and RbNaO

1982 ◽  
Vol 37 (7) ◽  
pp. 818-819 ◽  
Author(s):  
Horst Sabrowsky ◽  
Ulrich Schröer
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Structure Type ◽  
Sodium Oxide ◽  
Crystal Data ◽  
Potassium Sodium

Abstract Potassium Sodium Oxide, Rubidium Sodium Oxide The compounds KNaO and RbNaO have been prepared and their structures determined by powder and single crystal data. Both compounds show the anti-PbFCl crystal structure type with two molecular units. KNaO: a = 400.2(1) pm, c = 621.4(2) pm, c/a= 1.553; RbNaO: a = 409.3(9) pm, c = 653.1(9) pm, c/a = 1.595.

scholarly journals Crystal structure of potassium sodium heptahydrogen hexamolybdocobaltate(III) octahydrate: an extra-protonatedB-series Anderson-type heteropolyoxidometalate

2015 ◽  
Vol 71 (9) ◽  
pp. 1032-1035 ◽  
Author(s):  
Ki-Min Park ◽  
Hea-Chung Joo ◽  
Uk Lee
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Hydrogen Bonding ◽  
Ion Exchange ◽  
Title Compound ◽  
Potassium Sodium ◽  
Present Structure ◽  
Short Hydrogen Bond ◽  
Exchange Technique

The title compound, KNa[CoIII(OH)7{Mo6O17}]·8H2O, was obtained by the ion-exchange technique from K3[Co(μ3-OH)6Mo6O18]·7H2O. Six μ3-O atoms and one O atom of the bridging μ2-O atom are protonated. This novel polyanion protonated by an extra H atom is an unexpected polyanion species among theB-series Anderson-type polyoxidometalates (POMs), [Xn+(μ3-OH)6Mo6O18](6–n)–] (X= heteroatom). The extra H atom (seventh H atom) in the polyanion does not lie on a crystallographic centre of symmetry, but is located at the mid-point between two μ2-O atoms of adjacent polyanions, and forms a very short hydrogen bond [2.430 (5) Å]. The present structure is considered as particularly significant in understanding noncentrosymmetric strong hydrogen bonding.

Crystal structure of potassium sodium tartrate trihydrate

2011 ◽  
Vol 56 (6) ◽  
pp. 1038-1041 ◽  
Author(s):  
A. E. Egorova ◽  
V. A. Ivanov ◽  
N. V. Somov ◽  
V. N. Portnov ◽  
E. V. Chuprunov
Keyword(s):  
Crystal Structure ◽  
Sodium Tartrate ◽  
Potassium Sodium ◽  
Potassium Sodium Tartrate

Crystal Structure Determination of Glycerol-Containing Lipids from Electron Diffraction Data. Use of Analog Compounds Based upon Configurational Isomers of Cyclopentane-1, 2, 3-TRIOL

1977 ◽  
Vol 35 ◽  
pp. 24-25
Author(s):  
Douglas L. Dorset ◽  
Anthony J. Hancock
Keyword(s):  
Crystal Structure ◽  
Electron Diffraction ◽  
Diffraction Data ◽  
Structure Determination ◽  
Crystal Surface ◽  
Coherent Scattering ◽  
Crystal Structure Determination ◽  
Electron Diffraction Data ◽  
Polar Group ◽  
Axis Orientation

Lipids containing long polymethylene chains were among the first compounds subjected to electron diffraction structure analysis. It was only recently realized, however, that various distortions of thin lipid microcrystal plates, e.g. bends, polar group and methyl end plane disorders, etc. (1-3), restrict coherent scattering to the methylene subcell alone, particularly if undistorted molecular layers have well-defined end planes. Thus, ab initio crystal structure determination on a given single uncharacterized natural lipid using electron diffraction data can only hope to identify the subcell packing and the chain axis orientation with respect to the crystal surface. In lipids based on glycerol, for example, conformations of long chains and polar groups about the C-C bonds of this moiety still would remain unknown.One possible means of surmounting this difficulty is to investigate structural analogs of the material of interest in conjunction with the natural compound itself. Suitable analogs to the glycerol lipids are compounds based on the three configurational isomers of cyclopentane-1,2,3-triol shown in Fig. 1, in which three rotameric forms of the natural glycerol derivatives are fixed by the ring structure (4-7).

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