Re: Crystal Structures of Pyroaurite and Sjögrenite

1994 ◽  
Vol 38 ◽  
pp. 749-755 ◽  
Author(s):  
A. Olowe
Keyword(s):  
Crystal Structure ◽  
Crystal Structures ◽  
Structure Analysis ◽  
Crystal Structure Analysis ◽  
Metallic Ions ◽  
Chemical Formula ◽  
Metal Hydroxides ◽  
Space Group ◽  
Previous Discussion ◽  
Positively Charged

Abstract Pyroaurite and sjogrenite belong to the group of sandwiched lamellar metal hydroxides which have a fixed metallic ions MII:MIII ratio for a particular class. Their crystal structure consists of positively charged metal hydroxide blocks intercalated with negatively charged interlayers. The atomic positions for the interlayer are definite for a particular class. The exact chemical formula of the pyroaurite class is determined from crystal structure analysis to be MII 6MIII 2(OH)16-CO3-4.5H2O; it crystallizes in the space group Rm with a = 12.4376 Å and c = 23.4126 Å. Sjogrenite, MII 6 MIII 2(OH)16-CO3-4H2O crystallizes in the space group P63/mcm. The crystallogiraphy and structural relationship between these classes are discussed. Previous discussion on these compounds did not give any conclusion on the exact chemical formula and the atomic positions.

Über die Tricyanatomercurate KHg(NCO)3 und RbHg(NCO)3 — Synthesen, Kristallstrukturen und Schwingungsspektren / On the Cyanatomercurates KHg(NCO)3 and RbHg(NCO)3 — Syntheses, Crystal Structures and Vibrational Spectra

1977 ◽  
Vol 32 (11) ◽  
pp. 1239-1243 ◽  
Author(s):  
Gerhard Thiele ◽  
Peter Hilfrich
Keyword(s):  
Crystal Structure ◽  
Aqueous Solutions ◽  
Crystal Structures ◽  
Structure Analysis ◽  
Vibrational Spectra ◽  
Crystal Structure Analysis ◽  
Space Group

By mixing aqueous solutions of Hg(CH3COO)2 and KOCN the white precipitate K2Hg3(NCO)8 is formed. When recrystallised from CH3OH colorless crystals of the compound KHg(NCO)3 are obtained. The crystal structure analysis (space group Pnma; α = 1015.2(6) pm, b = 399.3(3) pm, c = 1772.9(9) pm) shows a distorted KCdCl3 arrangement with isolated Hg(NCO)2 molecules, K+ and NCO- ions. The vibrational spectra in the range of 250-3000 cm-1 are discussed. The rubidium compound is isotypous (a = 1019.0(6) pm, b = 411.6(4) pm, c = 1820.5(8) pm).

Crystal structure analysis and extremely long-living light-induced metastable states in RbY[Fe(CN)5NO]2·10H2O and CsY[Fe(CN)5NO]2·10H2O

2002 ◽  
Vol 217 (10) ◽  
Author(s):  
Th. Woike ◽  
P. Held ◽  
M. Mühlberg ◽  
M. Imlau
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Crystal Structures ◽  
Structure Analysis ◽  
Diffraction Data ◽  
Crystal Structure Analysis ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
Data Space

AbstractCrystal structures of both isostructural com-pounds were solved from single crystal X-ray diffraction data (space group

Primäre und sekundäre Ethyl-und i-Propylsulfoniumsalze sowie Kristallstruktur von i-C3H7SH2+SbF6- [1]

1996 ◽  
Vol 51 (2) ◽  
pp. 277-285
Author(s):  
Rolf Minkwitz ◽  
Ulrike Lohmann ◽  
Hans Preut
Keyword(s):  
Crystal Structure ◽  
Structure Analysis ◽  
Bond Distance ◽  
Crystal Structure Analysis ◽  
Unit Cell ◽  
Monoclinic Space Group ◽  
Spectroscopic Methods ◽  
Sulfonium Salt ◽  
Space Group

Abstract The synthesis of salts of the type RnSH3-n+MF6- (R = C2H5, i-C3H7; n = 1, 2; M = As, Sb) by protonation of the corresponding thiols and sulfides in the superacid systems HF/MF5 is reported. The salts have been characterized by vibrational and NMR spectroscopic methods. Isopropylsulfonium hexafluoroantimonate is the first known example of a sulfonium salt, for which a SH bond distance has been determined by a crystal structure analysis, i-C3H7SH2+SbF6- crystallizes in the monoclinic space group P21/m with a = 568.0(4), b = 801.1(6), c = 1019.7(8) pm, β = 82.63(6) °, with two formula units per unit cell.

Kristallstruktur und Konstitution des Perchlorbenzocyclobutens (β-C8Cl8)

1974 ◽  
Vol 29 (5) ◽  
pp. 831
Author(s):  
J. Haase ◽  
P. Widmann
Keyword(s):  
Crystal Structure ◽  
Structure Analysis ◽  
Crystal Structure Analysis ◽  
Spectroscopic Measurements ◽  
Space Group

Abstract The crystal structure of perchlorobenzocyclobutene (β-C8Cl8) has been investigated and solved by means of the unusual Patterson projection along the axis of twinning, by which the space group had been determined. As a result of the crystal structure analysis the constitution of the molecule, derived by J. Brandmüller and E. Ziegler from spectroscopic measurements, has been found to be true.

Cyclisierung von Amidoximen mit Oxybis(diphenylboran) / Cyclization of Amidoximes with Oxybis(diphenylborane)

1991 ◽  
Vol 46 (9) ◽  
pp. 1219-1222 ◽  
Author(s):  
Hans Möhrle ◽  
Karin Bluhme-Hensen ◽  
Birgit Middelhauve ◽  
Dietrich Mootz ◽  
Hartmut Wunderlich
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Structure Analysis ◽  
Heterocyclic Ring ◽  
Crystal Structure Analysis ◽  
Monoclinic Space Group ◽  
Space Group ◽  
Bifurcated Hydrogen Bond ◽  
Boron Heterocycles

Substituted amidoximes when reacted with oxybis(diphenylborane) do not yield ester chelates as main products but boron heterocycles. The compound obtained from p-toluamidoxime was found by crystal structure analysis to be 2-phenyl-4-(4-methylphenyl)-2,3-dihydro-1,3,5,2-oxadiazaborol (9). The conformation of the molecule is determined by angles of 29.1 and 24.4° between the planes of adjacent rings. Except N–O all bonds in the heterocyclic ring contain significant π character. Molecules are linked to chains by a weak bifurcated hydrogen bond. 9 crystallizes with the monoclinic space group P21/c, Ζ = 4, a = 5.574(2), b = 18.274(4), c = 12.754(4) Å, β = 106.41(2)°. Refinement of 227 parameters using 1709 observed reflections converged at R = 0.037.

scholarly journals E. S. Fedorov Promoting the Russian-German Scientific Interrelationship

Minerals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 181 ◽  
Author(s):  
Peter Paufler ◽  
Stanislav K. Filatov
Keyword(s):  
Crystal Structure ◽  
Crystal Structures ◽  
Structure Analysis ◽  
Crystalline State ◽  
Crystal Structure Analysis ◽  
Present Knowledge ◽  
Personal Contact ◽  
X Ray Diffraction ◽  
X Ray ◽  
The Impact

At the dawn of crystal structure analysis, the close personal contact between researchers in Russia and Germany, well documented in the “Zeitschrift für Krystallographie und Mineralogie”, contributed significantly to the evolution of our present knowledge of the crystalline state. The impact of the Russian crystallographer E. S. Fedorov upon German scientists such as A. Schoenflies and P. Groth and the effect of these contacts for Fedorov are highlighted hundred years after the death of the latter. A creative exchange of ideas paved the way for the analysis of crystal structures with the aid of X-ray diffraction.

Über die Darstellung der (Chlorthio)sulfoniumsalze [(CH3)2SSSCl]+SbF6-, [(CH3)2SSCl]+SbF6- und des isomeren [(CH3)(Cl)S – SCH3]+SbCl6- / On the Preparation of the (Chlorothio)sulfonium Salts [(CH3)2SSSCl]+SbF6-, [(CH3)2SSCl]+SbF6- and the Isomer [(CH3)(Cl)S–SCH3]+SbCl6-

1990 ◽  
Vol 45 (12) ◽  
pp. 1637-1642 ◽  
Author(s):  
Rolf Minkwitz ◽  
Andreas Kornath ◽  
Renate Krause ◽  
Hans Preut
Keyword(s):  
Crystal Structure ◽  
Structure Analysis ◽  
Crystal Structure Analysis ◽  
Molar Ratio ◽  
Sulfonium Salts ◽  
Space Group

The preparation of the stable compounds [(CH3)2SSCl]+SbF6- and [(CH3)2,SSSCl]+SbF6- from [(CH3)2SH]+SbF6- and SCl2 and S2Cl2, resp., is reported.The isomer [(CH3)(Cl)S–SCH3]+SbCl6- is prepared from [SCl3]+SbCl6- and CH3SH in the molar ratio 1:2. For this salt a crystal structure analysis was carried out (Space group P212121, Z = 4, a = 750.1(4), b = 1133.7(3), c = 1614.8(3) pm).

Structures and photochemistry of 1,5-disubstituted dibenzobarrelenes

1996 ◽  
Vol 52 (1) ◽  
pp. 151-158
Author(s):  
R. Jones ◽  
S. J. Rettig ◽  
J. R. Scheffer ◽  
J. Trotter ◽  
J. Yang
Keyword(s):  
Crystal Structure ◽  
Double Bond ◽  
Crystal Structures ◽  
Structure Analysis ◽  
Crystal Structure Analysis ◽  
The Other ◽  
Steric Effects ◽  
Molecular And Crystal Structures ◽  
Electronic And Steric Effects

The effect of 1,5-disubstitution on the photochemistry of 9,10-ethenoanthracene-11,12-diesters has been studied and correlated with the crystal structures determined for several derivatives; photoproduct structures have been established from a crystal structure analysis of one of the products and from NMR correlations. The crystals studied are: (1)-Cl, dimethyl 1,5-dichloro-9,10-dihydro-9,10-ethenoanthracene-11,12-dicarboxylate, C20H14Cl2O4, P21/n; (1)-CN, 1,5-dicyano derivative, C22H14N2O4, P21/n; (1)-CN.0.5p-xylene, C22H14N2O4.0.5C8H10, P21/c; (1)-CN.xxylene, C22H14N2O4.xC8H10, P21/n; (1)-OMe, 1,5-dimethoxy derivative, C22H20O6, P{\bar 1}; (2b)-Cl, C20H14C12O4, dimethyl 1,5-dichloro-4b,8b,8c,8d-tetrahydrodibenzo[a, f]cyclopropa[c,d]pentalene-8c,8d-dicarboxylate, Pna21. The dibenzobarrelene molecules all have geometries and dimensions similar to those of related materials. In particular, the orientations of the two ester groups in each molecule differ, one being in general almost fully conjugated with the C(11)=C(12) double bond and the other almost non-conjugated. Relationships are sought between the ratios of the two regioisomeric photoproducts and molecular and crystal structures; both electronic and steric effects are considered, but no one effect seems to dominate.

Zur Reaktion von [MCl2(PR3)2] (M = Ni, Pd) mit E(SiMe3)2 (E = S, Se) Die Kristallstrukturen von [Ni3S2Cl2(PPh3)4], [Pd3S2Cl2(PPh3)4], INi3Se2(SeSiMe3)2(P(C2H4Ph)3)4] und [Pd3Se2(SeSiMe3)2(PPh3)4] / Reaction of [MCl2(PR3)2] (M = Ni, Pd) with E(SiMe3)2 (E = S, Se) The Crystal Structures of [Ni3S2Cl2(PPh3)4], [Pd3S2Cl2(PPh3)4], [Ni3Se2(SeSiMe3)2(P(C2H4Ph)3)4] and [Pd3Se2(SeSiMe3)2(PPh3)4]

1990 ◽  
Vol 45 (2) ◽  
pp. 127-133 ◽  
Author(s):  
Dieter Fenske ◽  
Holm Fleischer ◽  
Harald Krautscheid ◽  
Jörg Magull
Keyword(s):  
Crystal Structure ◽  
Crystal Structures ◽  
Structure Analysis ◽  
Crystal Structure Analysis ◽  
X Ray ◽  
Triangular Clusters

[MC12(PR3)2] (M = Ni, Pd) reacts with E(SiMe3)2 (E = S, Se) to form triangular clusters, [Ni3S2Cl2(PPh3)4] (1), [Pd3S2Cl2(PPh3)4] (2), [Ni3Se2(SeSiMe3)2(P(C2H4Ph)3)4] (4) and [Pd3Se2(SeSiMe3)2(PPh3)4] (3). 1-4 have been characterized by X-ray crystal structure analysis. All these compounds contain a triangular M3-core, which is capped by two μ3-E-ligands (E = S in 1, Se in 3 and 4).

Unique 3D framework formed by adding MIIO4 groups into high Sb/P ratio phosphatoantimonates

2019 ◽  
Vol 234 (5) ◽  
pp. 301-306
Author(s):  
Wei-Long Zhang ◽  
Zhen-Gang Guo ◽  
Xiang-Feng Guan ◽  
Chinghwa Chen ◽  
Jiangang He ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Structure Analysis ◽  
Reflectance Spectrum ◽  
Crystal Structure Analysis ◽  
Band Gaps ◽  
Space Group ◽  
Optical Reflectance Spectrum ◽  
3D Framework ◽  
Single Crystal Structure Analysis

Abstract Explorations on a mixed metal phosphatoantimonate system led to the discovery of two new anhydrous phosphatoantimonates, namely, Cs4MSb6P4O28 (M=Mg, Zn), which represent the first examples of quinary AI – MII –SbV – PV– O systems. Single-crystal structure analysis reveals that the two title compounds crystallize in the tetragonal space group I41/a (No. 88). Their structures feature complicated 3D frameworks with interesting tunnel structures comprised of corner sharing MO4 tetrahedra, SbO6 octahedra and PO4 tetrahedra, with the Cs+ cations sitting in the tunnels to balance the valence. Optical reflectance spectrum measurements show that these two compounds are insulators with band gaps of about 4.5 eV.

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