Materials Literature
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Abstract The thermal decomposition of CaHPO 4 and CaHPO 4 .2H 2 O was studied by thermogravimetric analysis, X‐ray powder diffraction, and infra‐red spectroscopy. At 105°c, two moles of CaHPO 4 .2H 2 O combine and eliminate 1 mole of H 2 O. The remaining three moles of hydration water are eliminated at 165°c. Decompos…
Measurement of the molar enthalpies of mixing of molten nickel-copper alloys by means of a high-temperature calorimeter at 1480 °C immediately during the mixing of the two liquid components. Check of the fusion equilibria of the system nickel-copper and indication of new values for the solidus line. Determination of t…
Abstract Application of the Arrhenius relationship for temperature and ratio of isomeric units in polybutadiene made in the presence of butyllithium initiator is consistent with the existence of three simultaneous competing reactions. Evidence in the literature is cited to support the possibility that the growing chai…
The low-frequency linear electrooptic coefficient r 41 T in semi-insulating ZnTe is measured at 10.6 µm at room temperature. The measured value is (3.9±0.2)×10 -12 m/V, which is only slightly smaller than that in the visible region. This result seems consistent with a lattice theory on the dispersion of r 41 T in crys…
The relationship between the mechanical properties of textile composite structures and those of the constituting face and liner fabrics have been studied experimentally and theoretically. Three different face fabrics have been fused together with a number of fusible interlinings of different base cloth, adhesive type,…
Abstract Wide‐line NMR spectra have been obtained on an oriented sample of drawn nylon 66 fibers at temperatures between −196°C and 200°C and at alignment angles between the fiber axis and the magnetic field of 0°, 45°, and 90°. At −196°C, 20°C, and 180°C, the complete angle dependence of the NMR spectrum has been mea…
The optically active lattice frequencies of α- and β-O2 have been calculated in the rigid-molecule approximation using an atom–atom Lennard-Jones [6–12] potential, with and without the addition of an intermolecular quadrupole–quadrupole interaction. Both models predict frequencies reasonably close to those observed ex…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGeCd4S6, a new defect tetrahedral structure typeH. Steinfink and K. SusaCite this: Inorg. Chem. 1971, 10, 8, 1754–1756Publication Date (Print):August 1, 1971Publication History Published online1 May 2002Published inissue 1 August 1971https://pubs.acs.org/doi/10.1021/ic50102a…
A loom developed for producing small samples of triaxially woven fabrics was used to weave experimental amounts of fabric from coarse string, from 3-ply, 840-den nylon yarn and from graphite yarn. The shedding and warp yarn indexing motions are controlled by a series of cams mounted on a cam roll. The sequence of cams…
J M Eisenberg and W Greiner Amsterdam: North-Holland 1970 pp xiv + 476 price £8.40 Nuclear physics excites the interests of undergraduates and often captures the more able students for postgraduate work. It is difficult to recognize all the elements in the attractions of the subject.
When a sample of SO2 in a large excess of argon is codeposited at 4 or at 14°K with an atomic beam of an alkali metal, prominent new absorptions appear near 500 cm−1 and between 975 and 1100 cm−1. The pattern of absorptions is somewhat dependent both upon the alkali metal and upon the temperature at which the sample i…
Single crystals have been grown based on optical quality lithium fluoride with the addition of magnesium and titanium. The content and distribution of titanium has been determined by x-ray fluorescence analysis and related to the intensity of an optical absorption band near 200 nm. The variation of thermoluminescence…
New methods of sterilization employing a chemical with moderate heat and ultrasonic energy have been devised. Inactivation of high-density bacterial spore suspensions is achieved by treatment with low concentration aqueous acid glutaraldehyde solutions at temperatures above or about 54 C. Low (20 kHz) or high (250 kHz…
Quantitative diagrams of the fringed micellar model have been produced for tire cord, Fortisan, wood cellulose, cotton, ramie and bacterial cellulose, based on the results of the reactivities of these celluloses towards deuterium oxide and acid hydrolysis. The hypothesis has been used that rapid acid hydrolysis occurs…
Abstract Crystals of the 2 : 3 complex of zinc-phthalocyanine and normal hexylamine were studied. They are monoclinic, space group P21⁄c, with cell dimensions a=12.40, b=15.76, c=20.05, β=93.2° and there are four phthalocyanine and six hexylamine molecules per cell. The phthalocyanine molecule is not planar and the ce…
Detailed measurements of the electrical resistance of a pure chromium single crystal, $\frac{{R}_{300}}{{R}_{4.2}}=350$, have been made over the temperature range 77-325 \ifmmode^\circ\else\textdegree\fi{} K for both the single-domain $\stackrel{\ensuremath{\rightarrow}}{\mathrm{J}}\ensuremath{\parallel}\stackrel{\ens…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpin-spin coupling between copper(II) ions bridged by pyrazine ligandsWilliam E. Hatfield and Juan F. VillaCite this: J. Am. Chem. Soc. 1971, 93, 16, 4081–4082Publication Date (Print):August 1, 1971Publication History Published online1 May 2002Published inissue 1 August 1971…
Abstract The effect of molecular organization (crystallinity, orientation) on the internal friction of poly(ethylene terephthalate) was studied by means of dynamic mechanical measurements at temperatures from 300 to 4.2°K, with a free‐oscillating torsion pendulum at 1 Hz. It was found that crystallinity decreases the…
The methods of normal probability plot analysis have been applied to two nearly complete sets of structure factors ( F meas ) and the corresponding objectively assigned standard deviations (σ F meas ) obtained by diffractometer measurement with two different crystals of lutetium orthoborate. The least-squares derived…
The Th–Co and Th–Fe systems were studied by x-ray diffraction methods. Five intermetallic compounds were observed in each system. For each of these compounds the lattice parameters were determined. The magnetic properties of the various compounds were investigated at temperatures between 4.2 and 1200 K with magnetic f…