The fifth international symposium on cement chemistry
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Materials Literature
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Cement and prefabrication
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New research on necessary measures against harmful inclusions of clay (continued)
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Plastic pipes for hot water
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The cement industry in Japan, 1968
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Concrete admixtures
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Scattering matrices for the Raman effect in magnetic crystals
The symmetry of a magnetic crystal can be described by one of the black and white Shubnikov point groups containing both unitary and anti-unitary elements. The theory is reviewed that enables a tensor to be symmetry adapted to any one of the irreducible corepresentations of a non-unitary group and it is applied to the…
Jahn-Teller distortions in octahedral copper(II) complexes
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTJahn-Teller distortions in octahedral copper(II) complexesM. V. Veidis, G. H. Schreiber, T. E. Gough, and Gus J. PalenikCite this: J. Am. Chem. Soc. 1969, 91, 7, 1859–1860Publication Date (Print):March 1, 1969Publication History Published online1 May 2002Published inissue 1…
Thermal analysis of polydimethylsiloxanes. I. Thermal degradation in controlled atmospheres
Abstract Thermogravimetric analyses (TGA) of catalyst‐free polydimethylsiloxanes (PDMS) have been carried out in controlled atmospheres and a kinetic analysis of the results has enabled the various decomposition processes to be separated and identified. The calculated activation energy for thermal depolymerization is…
Temperature Dependence of Ms and K1 of BaFe12O19 and SrFe12O19 Single Crystals
Single crystals of BaFe12O19 and SrFe12O19 were grown in a Na2O flux. Static magnetic measurements on the two crystal types were made to reveal Ms and K1 as functions of temperature. It was found that Ms of BaFe12O19 and SrFe12O19 are practically identical over the temperature range 77°K to the Curie point with a room…
Crystallography and structure of .alpha.-zirconium bis(monohydrogen orthophosphate) monohydrate
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystallography and structure of .alpha.-zirconium bis(monohydrogen orthophosphate) monohydrateAbraham Clearfield and G. David SmithCite this: Inorg. Chem. 1969, 8, 3, 431–436Publication Date (Print):March 1, 1969Publication History Published online1 May 2002Published inissu…
A COMPOSITE RATING OF ALGAE TOLERATING ORGANIC POLLUTION2
From information on pollution-tolerant algae compiled from reports from 165 authors, the genera and species most often referred to as significant fall into a relatively stable series. Diatoms, pigmented flagellates, green, and blue-green algae are all well represented among the pollution-tolerant genera and species. T…
Softening of Rubber by Deformation
Abstract It has been known for many years that deformation results in softening of rubber and that the initial stress-strain curve determined during the first deformation is unique and cannot be retraced. Further the effect of repeated deformation is to cause rubber asymptotically to approach a steady state with a con…
Metallic Colloids in Molten Salts
Gold, silver, and silver iodide sols were prepared in mixed nitrate melts. Electron micographs of the gold and silver sols show particles smaller than 1 micron. The gold sols exhibit conventional absorption and scattering spectra. Both gold amid silver sols show unusual stability.
Boron Modifications Produced in an Induction-Coupled Argon Plasma
Most of the small particles (50 to 100 micrometers in diameter) of microcrystalline beta-rhombohedral boron that quickly transit an argon plasma maintained within a radio-frequency induction-coupled torch emerge as better crystallized spheroids of the same crystalline form and nearly the same size as the starting mate…
MAGNETIC IMPURITIES IN NONMAGNETIC METALS
Review based on papers delivered by the author at the International Symposium on Modern Physics, Trieste, July 1968, and at the Soviet- American Symposium on Solid State Theory, Moscow, July 1968.
Coalescence of Two Immiscible Liquid Drops
When two immiscible liquid drops suspended in a third immiscible liquid are brought into contact, three equilibrium configurations which depend upon the spreading coefficients are possible. Experiments for a large number of systems, including three phase emulsions, confirm the theory and indicate the mechanisms of rea…
The crystallography and paramagnetic anisotropy of potassium ferricyanide
Abstract Single crystal X-ray analyses of the structure of potassium ferricyanide at ca. 300 and 95° K are reported. Least-squares refinements within the monoclinic space group, P21/c, have converged with the residuals R300°K = 0·092 and R95°K = 0·077. The unit cell dimensions at 300°K are: a = 7·06, b = 10·38, c = 8·…
Photoemission from VO2
Photoemission quantum yield and energy distribution curves have been measured for V${\mathrm{O}}_{2}$ in the tetragonal (100\ifmmode^\circ\else\textdegree\fi{}C) and monoclinic (25\ifmmode^\circ\else\textdegree\fi{}C) phases over the photon energy range from 7 to 11.5 eV. The V${\mathrm{O}}_{2}$ studied was a polycrys…
The silver–calcium phase diagram
The silver–calcium system has been reinvestigated over the whole composition range by thermal analysis, X-ray diffraction, and metallography. A novel technique has been used to prepare and examine these reactive alloys. In the course of this project four intermetallic compounds have been observed for the first time; w…