Materials Literature
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Source of material: Slow evaporation of a solution of stoichiometric quantities of lead(II) iodide and pyridinium iodide yields the title compound as yellow prisms. The title compound is another member of the large family of chain-perovskites. The anionic substructure consists of chains of face-sharing Pbl octahedra a…
A new method is provided for the calculation of Raman intensities. Atomic polarizabilities are used as parameters to reproduce the experimental intensities. The method was applied to an MgF2 signal crystal. It is shown that the use of anisotropic atomic polarizabilities allows the simulation of both the cell polarizab…
Article Crystal structure of a new modification of potassium tetrathioantimonate, ß-K3SbS4 was published on December 1, 1997 in the journal Zeitschrift für Kristallographie - New Crystal Structures (volume 212, issue 1).
of database ICSD in 1997, CSD-No
The intercalation reactions of iodine with the layered oxide ion conductors Sr x Bi 9 - x O (27 - x )/2 ( x = 0.90, 1.20, 1.50, 2.00, 2.40) have been studied by powder X-ray diffraction, thermogravimetric analysis, and Raman spectroscopy. X-ray diffraction data show that iodine atoms intercalate into the van der Waals…
The Raman active vibrational modes in (pi) -conjugated polymers are known to have different frequencies in different types of experiments. The best known examples are the resonant Raman scattering (RRS) and doping or photoinduced absorption infrared active vibrations (IRAV) measurements, in which the same modes appear…
Article Crystal structure of 1,2,4,5-benzenetetracarboxylate monohydrate cerium( III), C10H4CeO9 was published on December 1, 1997 in the journal Zeitschrift für Kristallographie - New Crystal Structures (volume 212, issue 1).
The concentration effect of palm oil fatty acid on curing characteristics and mechanical properties of carbon black filled natural rubber compounds was investigated. Results indicate that maximum torque increases with palm oil fatty acid concentration for all carbon black loadings investigated. Natural rubber compound…
Chemical vapor deposition (CVD) of boron from BCl 3 and H 2 was investigated in a dual-impinging jet reactor which was connected to an FT-IR spectrometer for on-line chemical analysis of the reactor outlet stream. Formation of the intermediate, BHCl 2, during CVD of boron on a hot tungsten substrate was experimentally…
The atomic structure of poly-molybdate ions formed in acid Ni-Mo aqueous solutions has been determined by applying anomalous X-ray scattering (AXS) and EXAFS methods. In a solution containing only molybdenum ions, we found only a poly-molybdate ion consisting of seven edgesharing MoO 6 octahedra. In a solution contain…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTNew Route to the Introduction of Axial and Helical Chiral Units into Poly(arylene ether)sZhi Yuan Wang and Judy E. DouglasView Author Information Department of Chemistry, Ottawa-Carleton Chemistry Institute, Carleton University, 112…
Pyro-carbon-coated fuel particles used in modular high-temperature gas-cooled reactor fuel rods have the potential to enhance fuel rod safety when they are packed in pressurized water reactor (PWR) fuel pellets. A fuel assembly design concept with new fuel pellets was introduced and its nuclear feasibility on PWR appl…
Abstract The distribution of clay minerals in recent sediments on the continental shelf and in the Bay of Cádiz has been analysed as part of a wider study of sedimentary exchange between the continent and the continental margin. The clay minerals included in the muddy sediments consist mainly of illite, kaolinite, sme…
Two high-molecular-weight organosoluble aromatic polyimides having the same diamine, 2,2′-(trifluoromethyl)-4,4′-diaminobiphenyl diamine (PFMB), but different dianhydrides, 2,2′-bis(trifluoromethyl)-4,4′,5,5′-biphenyltetracarboxylic dianhydride (HFBPDA) and 2,2′-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride (6…
During the synthesis by flux evaporation in KC1 at 930°C of KCrIIPO4 an oxidation of chromium II was observed, leading to the formation of chromium pyrophophate KCrIIIP2O7. The crystal lattice of KCrIIIP2O7, was found to be of monoclinic centrosymmetric space group P21/c with a=7.3470(7), b=9.9090(10), c=8.1730(8)Å, β…
Polycrystalline thin LiF films thermally evaporated on amorphous substrates show different crystallite orientations depending on the substrate temperature during evaporation. The recording of direct diffraction pole figure shows that the LiF crystallites present a single crystal texture, which can be described as a 〈5…
Article The two-step phase transition of titanite, CaTiSiO5: a Synchrotron radiation study was published on December 1, 1997 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume 212, issue 1).
Abstract We determined the decomposition equilibria of ammonium samarium chlorides (NH 4 ) 2 SmCl 5 and NH 4 Sm 2 Cl 7 by total pressure measurements and derived their thermody namical data from the decomposition functions. The enthalpies of formation were compared with the results of the solution calorimetry. The he…
X-ray powder diffraction data are reported for α-brass with the composition Cu: 63.44±0.04 wt %, Zn: 36.45±0.06 wt %. No valid reference card for this material is present in the JCPDS-ICDD database. The investigated brass composition is cubic ( Fm 3 m ) with a 0 : 3.69612±0.00014 Å, unit cell volume: 50.4938±0.0058 Å…
A passivation technique using highly concentrated ozone has been developed for electropolished stainless steel tubings that supply corrosive gases. The strong oxidizing ability of ozone enables the inner surface to form an anticorrosive passivation film with thickness up to 60 Å under room temperature and atmospheric…