Deposits of clastic carbonate-dominated (calciclastic) sedimentary slope systems in the rock record have been identified mostly as linearly-consistent carbonate apron deposits, even though most ancient clastic carbonate slope deposits fit the submarine fan systems better. Calciclastic submarine fans are consequently rarely described and are poorly understood. Subsequently, very little is known especially in mud-dominated calciclastic submarine fan systems. Presented in this study are a sedimentological core and petrographic characterisation of samples from eleven boreholes from the Lower Carboniferous of Bowland Basin (Northwest England) that reveals a >250 m thick calciturbidite complex deposited in a calciclastic submarine fan setting. Seven facies are recognised from core and thin section characterisation and are grouped into three carbonate turbidite sequences. They include: 1) Calciturbidites, comprising mostly of highto low-density, wavy-laminated bioclast-rich facies; 2) low-density densite mudstones which are characterised by planar laminated and unlaminated muddominated facies; and 3) Calcidebrites which are muddy or hyper-concentrated debrisflow deposits occurring as poorly-sorted, chaotic, mud-supported floatstones. These

Phd by thesis

Solution combustion is an exciting phenomenon, which involves propagation of self-sustained exothermic reactions along an aqueous or sol–gel media. This process allows for the synthesis of a variety of nanoscale materials, including oxides, metals, alloys, and sulfides. This Review focuses on the analysis of new approaches and results in the field of solution combustion synthesis (SCS) obtained during recent years. Thermodynamics and kinetics of reactive solutions used in different chemical routes are considered, and the role of process parameters is discussed, emphasizing the chemical mechanisms that are responsible for rapid self-sustained combustion reactions. The basic principles for controlling the composition, structure, and nanostructure of SCS products, and routes to regulate the size and morphology of the nanoscale materials are also reviewed. Recently developed systems that lead to the formation of novel materials and unique structures (e.g., thin films and two-dimensional crystals) with unusual...

Solution Combustion Synthesis of Nanoscale Materials

Scaling of ab initio force fields by MOLVIB

Lithium-sulfur (Li-S) batteries suffer from rapid capacity decay and low energy efficiency because of the low solubility of lithium sulfide (Li2S) in organic solvents and the intrinsic polysulfide shuttle phenomenon. Here, a novel additive, phosphorus pentasulfide (P2S5) in organic electrolyte, is reported to boost the cycling performance of Li-S batteries. The function of the additive is two-fold: 1) P2S5 promotes the dissolution of Li2S and alleviates the loss of capacity caused by the precipitation of Li2S and 2) P2S5 passivates the surface of lithium metal and therefore eliminates the polysulfide shuttle phenomenon. A Li-S test cell demonstrates a high reversible capacity of 900–1350 mAh g−1 and a high coulombic efficiency of ≥90% for at least 40 stable cycles at 0.1 C.

Phosphorous Pentasulfide as a Novel Additive for High‐Performance Lithium‐Sulfur Batteries

The present study is concerned with the nanocasting preparation of Co3O4 nanostructures employing two-dimensional (2D) hexagonal SBA-15 and three-dimensional (3D) cubic KIT-6 as hard templates. The...

Hard templating pathways for the synthesis of nanostructured porous Co₃O₄

Thermal decomposition of nickel nitrate hexahydrate, Ni(NO3)2·6H2O, in comparison to Co(NO3)2·6H2O and Ca(NO3)2·4H2O

Thermal decomposition of cobalt nitrato compounds: Preparation of anhydrous cobalt(II)nitrate and its characterisation by Infrared and Raman spectra

Die neuen Verbindungen Cs2P2S6 und K2P2S6 kristallisieren orthorhombisch in der Raumgruppe Immm, Z = 2 mit den Gitterkonstanten 






und sind dem Tl2P2S2 isotyp. Sie enthalten diskrete P2S22−-Anionen als Baugruppen. Zwei PS4-Tetraeder sind uber eine gemeinsame Kante zum Hezathiometadiphosphat-Anion P2S22− -verknupft.



Die FIR/IR- und Ramanspektren dieser Verbindungen konnten auf der Basis der P2S22−-Enheiten mit D2h-Symmetrie in Analogie zum isoelektronischen Al2Cl6 zugeordnet werden. die Schmelzpunkte ergaben sich fur Cs2P2S6 zu 440±10°C und Fur K2S2S6 zu 508±10°C.



Crystal Structure and Vibration Spectra of Cs2P2S6 and K2P2S6.



Cs2P2S6 and K2P2S6 crystallize in the orthorhombic system, space group Immm, Z = 2 with the lattice constants 






.



The compounds are isotypic to Tl2P2S6. In the structure there are discrete P2S62− anions. Two PS4 tetrahedra are connected by a common edge to hexathiometadiphosphate groups. The far infrared, infrared, and Raman spectra of these compounds are assigned on the basis of P2S62− units with D2h symmetry in analogy to the isoelectronic Al2Cl6. The melting points are 440 ± 10°C for Cs2P2S6 and 508 ± 10°C for K2P2S6.

Kristallstruktur und Schwingungsspektren der Caesium- und Kalium-Hexathiometadiphosphate Cs2P2S6 und K2P2S6

C{sub 60}/C{sub 70} containing soot was produced by arc vaporization of graphite. The chromatographic separation of soot yielded fairly pure C{sub 60} and C{sub 70} samples. High-resolution FT-Raman spectra of C{sub 60} and C{sub 70} specimen as well as C{sub 60} and C{sub 70} solutions including polarization measurements are recorded. Compared to the spectrum of solid C{sub 60}, some Raman bands of the C{sub 60} solution change their position and shape. Even the purest commercial C{sub 60} samples contain solvent inclusions (impurities) in the order of some percentage. The chromatographic separation combined with Raman polarization measurements of solutions allows an evaluation of the fundamental vibrations of the C{sub 60} molecule. Its assignment, in accordance with the group theoretical expectation, is proposed. The existence of small amounts of C{sub 60} isomers (symmetry e.g., C{sub 2v}, D{sub 2h}, D{sub 2d}) in icosahedral C{sub 60} (I{sub h}) is affirmed based on the polarization measurements. For C{sub 70} the most extended set of Raman frequencies is presented. 40 refs., 14 figs., 2 tabs.

FT-Raman Spectroscopic Studies of C60 and C70 Subsequent to Chromatographic Separation Including Solvent Effects

The vibrational spectra of the cage compounds P4S3, P4Se3 and AS4S3 have been recorded in the solid and the molten state. The vibrational spectra of crystalline As4Se3, which decomposes during melting, have been investigated. The frequencies wore assigned using the concept of group frequencies.A new assignment of the Raman frequencies is proposed for P₄S₃ based on new po­larization data. The frequencies of the arsenic compounds are reported for the first time. The Raman spectra of the molten compounds suggest that the cage structure is retained in the molten state.

Schwingungsspektren der käfigstrukturierten Verbindungen P4S3, P4Se3, As4S3 und As4Se3 / Vibrational Spectra of the Cage Compounds P4S3, P4Se3, As4S3 and As4Se3

Wolfgang Brockner

Papers

Thermal decomposition of nickel nitrate hexahydrate, Ni(NO3)2·6H2O, in comparison to Co(NO3)2·6H2O and Ca(NO3)2·4H2O

Thermal decomposition of cobalt nitrato compounds: Preparation of anhydrous cobalt(II)nitrate and its characterisation by Infrared and Raman spectra

Kristallstruktur und Schwingungsspektren der Caesium- und Kalium-Hexathiometadiphosphate Cs2P2S6 und K2P2S6

FT-Raman Spectroscopic Studies of C60 and C70 Subsequent to Chromatographic Separation Including Solvent Effects

Schwingungsspektren der käfigstrukturierten Verbindungen P4S3, P4Se3, As4S3 und As4Se3 / Vibrational Spectra of the Cage Compounds P4S3, P4Se3, As4S3 and As4Se3