Materials Literature
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The crystal of gadolinium pentaphosphate belongs to the monoclinic system.The space group is P21/a.The crystal parameters are a=12.910(9), b=8.889(10), c=8.721(6)Å, β=90.53, z=4. The diffraction data have been col-lected by using PW-1100Four-Circle Diffractometer. The total number of inde-pendent diffraction amounts t…
Some experimental conditions which generate the dislocation-enhanced Snoek peak in Fe-C alloys are presented. The results indicate that the movement of non-screw dislocation segments is involved in the relaxation mechanism. The results are consistent with the movement of non-screw dislocations in a medium with a visco…
Abstract No Absrract.
Article Order-disorder transition in MgAl2O4 spinel at high temperatures up to 1700 °C was published on December 1, 1983 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume 165, issue 1-4).
A relaxation time of the order parameter in the ferroelectric phase of ammonium lithium sulfate has been determined by analyzing anomalous temperature dependence of the Brillouin peak intensity. It is shown that the anomalies of the elastic constants associated with the phase transition cannot be interpreted by a conv…
Samples from the upper Oligocene and lower Miocene of Holes 515B (Brazil Basin) and 516F (Rio Grande Rise) were examined for fossil marine diatom content. The preservation of the diatoms was poor and the species diversity low in both holes. However, it was possible to zone portions of the intervals studied using the z…
The internal friction and modulus changes in pure and hydrogenated nickel are measured after plastic deformation at frequencies of 2 Hz and 30 kHz. The hydrogen dissolution strongly diminishes a Bordoni-type peak (B peak) but develops a Snoek–Köster-type peak (SK peak) at a temperature well above the B peak. The SK pe…
Programmed cooling experiments with compositions in the system MgO-SiO 2 ranging from 59 wt.% SiO 2 (with olivine on the liquidus) to 63 wt.% SiO 2 (with protoenstatite on the liquidus) cooled at rates of from 0.4 to 25% min crystallize forsterite but not pyroxene. Because pyroxene does not nucleate, the forsterite pl…
dc breakdown and corona inception voltages are reported for SF6-air and SF6-CO2 mixtures in positive and negative rod-plane gaps. These voltages are compared with values obtained for SF6-N2 mixtures. The results show that the breakdown voltages of SF6-air mixtures exhibit corona stabilization over a pressure range whi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDeacylation and deformylation of pyrrolesKevin M. Smith, Michiko Miura, and Hani D. TabbaCite this: J. Org. Chem. 1983, 48, 24, 4779–4781Publication Date (Print):December 1, 1983Publication History Published online1 May 2002Published inissue 1 December 1983https://doi.org/10…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMNDO studies of proton affinity as a probe of electronic structure. 2. Boranes and carboranesRoger L. DeKock and Craig P. JasperseCite this: Inorg. Chem. 1983, 22, 26, 3843–3848Publication Date (Print):December 1, 1983Publication History Published online1 May 2002Published i…
A detailed analysis of hyperstoichiometric carbide fuel, which operated under sodium-bonding conditions up to 12.5 at. % burnup in the Rapsodie reactor, yields the description of the four contributions to geometric fuel swelling as functions of temperature and burnup: (a) solid fission products and cesium, (b) fission…
Abstract The synthesis and chain extension of polyisobutylene having nonfluxional terminal cyclopentadiene groups is described. The fluxional behavior of silylcyclopentadiene end groups was previously found to prevent Diels–Alder dimerization of the end groups. The incorporation of a propyl moiety between the silicon…
High‐resolution SEM photographs, N 2 adsorption isotherms, Hg porosimetry, and micrometer measurements were used to characterize CaO particle shapes and pore‐size distributions that result when calcite crystals are decomposed in vacuum at 686°C. The surface area of the CaO produced from large calcite crystals is const…
In the anionic copolymerization of elemental sulfur (S8) with propylene sulfide (P) below the floor temperature of elemental sulfur homopolymerization (Tf = 159°C), there is a certain concentration of elemental sulfur left when copolymerization is completed ([S8]eq). The dependence of [S8]eq on the feed ratio [P]0/[S8…
Abstract Microprobe analyses of members of the erlichmanite-laurite series from Guma Water and Senduma, Sierra Leone and Tanah Laut, Borneo, indicate that complete solid solution is possible between OsS 2 and RuS 2 with considerable substitution of Os and Ru by Ir, Rh, and Pt. The cell size of the erlichmanite from Gu…
Various Na 2 SO 4 ‐Na 2 CO 3 ‐CaCO 3 ‐SiO 2 combinations were studied by differential thermal analysis to elucidute the role of Na 2 SO 4 in soda‐lime‐silica glassmelting reactions. It was found that Na 2 SO 4 encourages the formation of wollastonite at 850° to 900°C. The solid‐state reaction of Na 2 Ca(CO 3 ) 2 occur…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRedox chemistry of iron tetraphenylporphyrin imidazolate-chelated protoheme, and of their iron(II)-superoxide adducts in dimethyl sulfoxideStephen E. Jones, G. Susan Srivatsa, Donald T. Sawyer, Teddy G. Traylor, and Terry C. MinceyCite this: Inorg. Chem. 1983, 22, 26, 3903–3…
2,2′-Bipyridinium pentachloroantimonate (III) and the metastable modification of 4,4′-bipyridinium pentachloroantimonate(III) were synthezised and investigated by single crystal X-ray diffraction analysis. The structures consist of 2,2′-bipyridinium and 4,4′-bipyridinium cations, respectively, and of pentachloroantimo…
We have prepared the layered compounds $\mathrm{Li}{\mathrm{Ti}}_{1\ensuremath{-}y}{M}_{y}{\mathrm{S}}_{2}$ ($M=\mathrm{V},\phantom{\rule{0ex}{0ex}}\mathrm{C}\mathrm{r},\phantom{\rule{0ex}{0ex}}\mathrm{F}\mathrm{e}$) by direct synthesis from a mixture of ${\mathrm{Li}}_{2}$S and the appropriate elements. The structure…