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A m odel was co nstru cted of p entagon al rin gs o f sy mm et ric al tet ra hedra so co nn ected t ha t all fiy e silico ns li e in one plane and all angles Si-O-Si app rox imate 180. From an ini tial tet rahedro n t he rings extend in six direction s to include its six edges and in t he r es ul t in g t hree-dim ens…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation O. L. Anderson, H. Christensen, P. Andreatch; Technique for Connecting Electrical Leads to Semico…
Diffusion in purified natural graphite crystals was studied by two techniques. Crystals with ${\mathrm{C}}^{14}$ atoms on the surface were prepared by heating at 1575\ifmmode^\circ\else\textdegree\fi{}C for thirty minutes in a mixture of radioactive carbon monoxide and helium. These crystals were heated at diffusion t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhysical Properties of Monolayers Adsorbed at the Solid–Air Interface. I. Friction and Wettability of Aliphatic Polar Compounds and Effect of HalogenationO. Levine and W. A. ZismanCite this: J. Phys. Chem. 1957, 61, 8, 1068–1077Publication Date (Print):August 1, 1957Publicat…
The infrared spectra of NaCl, NaBr, NaI, KCl, KBr, RbCl, CsCl in the gas phase have been measured in the region of the fundamental vibration frequency. The vibrational frequencies calculated from the observed spectra are: NaCl ωe=366 cm−1,NaBr ωe=302 cm−1,NaI ωe=258 cm−1,KCl ωe=281 cm−1,KBr ωe=213 cm−1,RbCl ωe=228 cm−…
Samples of ar~e n i c s ulfid e glaHS " -ere investigated to clc>lerll1ine the ir che m ical a nd phys ical properties. Amon g the proper ties r eported a re t ile hygros co pici t.I', chemi cal durability, hydroge n e lec trod e fUllc t ioll, ex pansivi ty , clastic nlOduli, modulus of rnpture', hardn ess, transmitta…
Large single crystals of Fe 7 Se 8 and Fe 3 Se 4 were prepared, and their magnetic properties below the Curie point were investigated by a torque magneto meter. The results obtained on Fe 7 Se 8 at room temperature show similar characterics to that of natural pyrhotite (Fe 7 S 8 ), i.e. the crystals can be magnetized…
The cubic structure of yttrium oxide is stable to 1800°C. in air as indicated by petrographic, X‐ray, and differential thermal analyses. A change in lattice parameter of less than ±0.007 a.u. was observed on heating the oxide to 1800°C. The mean specific heat of Y 2 O 3 to 1600°C. was 0.13 cal. per gm. per °C. The coe…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolypeptides. XVII. A Study of the Kinetics of the Primary Amine-initiated Polymerization of N-Carboxy-anhydrides with Special Reference to Configurational and Stereochemical EffectsR. D. Lundberg and Paul DotyCite this: J. Am. Chem. Soc. 1957, 79, 15, 3961–3972Publication D…
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ADVERTISEMENT RETURN TO ISSUEPREVArticlePolyethylene: Preparation, Structure, And PropertiesSundar L. Aggarwal and Orville J. SweetingCite this: Chem. Rev. 1957, 57, 4, 665–742Publication Date (Print):August 1, 1957Publication History Published online1 May 2002Published inissue 1 August 1957https://pubs.acs.org/doi/10…