Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The thermodynamics of a water‐vapor‐E‐glass system were studied by adsorption‐isotherm analysis. The seven isotherms completed were Brunauer type IV with permanent hysteresis. The first adsorbed water layer could not be removed by pumping, indicating permanent hydrolysis. Application of heat removed the remaining wate…
Abstract The methods of Hermans and Weidinger and of Wakelin et al. (the correlation and integral methods) were used to determine the degree of crystallinity in poly(ethylene terephthalate) (PET) fibers. A standarization of cutting of the amorphous background scattering in PET fibers, indispensable for the method of H…
The crystal structure of Ca(H2AsO4)2 (triclinic, PT, with two formula units per cell) has been refined by single-crystal neutron-diffraction analysis to give an R value of 0.025 over 930 independent neutron reflexions. For the non-hydrogen atoms, bond lengths, angles and thermal parameters agree very closely with the…
Abstract Interlayer K was extracted with sodium tetraphenylboron solution from a powdered sericite heated to the temperature of dehydroxylation and quenched to room temperature. By this procedure, sericite of the 2 M 1 type was changed to an interstratified mineral. The X-ray diffraction properties of this interstrati…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChemical studies of closo-1,5-dicarbapentaborane(5)Anton B. Burg and Thomas J. ReillyCite this: Inorg. Chem. 1972, 11, 8, 1962–1964Publication Date (Print):August 1, 1972Publication History Published online1 May 2002Published inissue 1 August 1972https://pubs.acs.org/doi/10.…
Gold films are used as an alloying flux to form 5 μ thick indium film seals at temperatures below 300°C. Pyrex was sealed to quartz, ULE, CER-VIT, Irtran 2, Ge, GaAs, Invar, Kovar, Al, and Cu. The seals can also be used as current feedthroughs and graded seals.
The structure of ferroelectric tetragonal KTN (KTaxNb1 - xO3 with x = 0.56), which is isomorphous with BaTiO3, has been determined by neutron diffraction. The atomic displacements from the cubic perovskite positions are δ(K) = 0.012 ± 0.003, δ(Ta,Nb) = 0.0003, δ(O(1)) = -0.010 ± 0.001 and δ(O(2)) = δ(O(3)) = -0.011 ±…
Transmission electron microscopy and selected area electron diffraction have been used to study the structural changes produced in thin (0001) crystals of NbSe2 and MoS2 by intercalation with sodium in ammonia solution. Three distinct superlattice structures have been identified, one, with orthorhombic symmetry, assoc…
Abstract Rare earth carbonates which give the same X-ray powder diffraction pattern as tengerite were prepared by heating aqueous solutions containing rare earth chlorides and ammonium trichloroacetate. Y, Er, Ho, and Gd gavee xactly the same X-ray powder pattern as tengerite, while Nd and Sm were similar to tengerite…
The room temperature Gd3+ EPR spectrum in SrF2 containing Ce3+ as a second dopant exhibits three types of symmetry sites: cubic, trigonal, and tetragonal. Relative intensities of the spectra from these sites have been determined as a function of the Ce3+ codopant level in crystals having nominally 0.1 molar % of Gd3+.…
Article Wasserstoff in intermetallischen Phasen am Beispiel des Systems Titan-Nickel-Wasserstoff was published on August 1, 1972 in the journal International Journal of Materials Research (volume 63, issue 8).
Abstract The magnetic susceptibilities of CuX2L (X: halide ion, L: 1,2,4-triazole, pyridazine, phthalazine, 4-amino-1,2,4-triazole) conform to the linear Ising model or Heisenberg model, indicating the presence of linear magnetic chains in the crystals. Fermi contact shift observed in the broad-line PMR spectrum indic…
The structure of ammonium hydrogen sulphate (AHS) has been determined in an (010) projection from X-ray diffraction data collected photographically at - 81°C. At this temperature AHS is in its ferroelectric phase. The asymmetric unit of the pseudo-orthorhombic unit cell (space group Ba) contains four formula units whi…
Abstract An aspartate racemase has been purified approximately 60-fold from the supernatant fraction of Streptococcus faecalis (ATCC 9790), a gram-positive organism whose peptidoglycan is cross-linked by d-isoasparagine residues. This partially purified preparation racemizes l-alanine about half as rapidly as it racem…
A synthetic compound SrTeO3 was discovered to exhibit ferroelectricity in the temperature range between 312 and 485°C. Small single crystals could be grown by the Kyropoulos method. The crystal belongs to the monoclinic system and its space group is C2/ c − C2 h6 at room temperature. A pronounced dielectric anomaly wa…
The temperature dependences of the magnetization and of the hyperfine field in ferromagnetic metals such as Fe or Ni are different even after transformation to constant volume. It is suggested that the effect of lattice vibrations can explain the observed explicit temperature dependence of the hyperfine field at const…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnetic properties of the complex di-.mu.-hydroxo-bis[2-(2-ethylaminoethyl)pyridine]dicopper(II) perchlorateDavid Y. Jeter, David L. Lewis, Judith C. Hempel, Derek J. Hodgson, and William E. HatfieldCite this: Inorg. Chem. 1972, 11, 8, 1958–1960Publication Date (Print):Augu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectronic spectrum of trinuclear chromium(III) acetateL. Dubicki and P. DayCite this: Inorg. Chem. 1972, 11, 8, 1868–1875Publication Date (Print):August 1, 1972Publication History Published online1 May 2002Published inissue 1 August 1972https://pubs.acs.org/doi/10.1021/ic50…
Abstract The formation of silver crystallites in silver-form zeolites was investigated, mainly by means of X-ray diffraction analysis. Silver ions were reduced to the zero-valent state; they aggregated to metals in three cases in this study—first, when silver-form zeolites were heated in a helium flow at above 600°C;…
The majority of theoretical work on the scattering of radiation from plasma is restricted to the low temperature regime where v/c<<1. Nevertheless it is common practice to apply the results of these theories to plasmas for which v/c/ approximately 0.05. (T e > approximately 600 eV). The theory of incoherent scattering…