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The new layered material, TaFe1+xTe3 (0.25 < x < 0.29), has been synthesized by reaction of the constituent elements. Single-crystal X-ray diffraction studies show that at x = 0.25 the compound crystallizes in the space group P21m (no. 11) (a = 7.436(1), b = 3.638(1), c = 10.008(1) Å, β = 109.17(1)°). The structure fe…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAbsorption spectra of tellurium clusters in solid argonParviz Hassanzadeh, Craig Thompson, and Lester AndrewsCite this: J. Phys. Chem. 1992, 96, 21, 8246–8249Publication Date (Print):October 1, 1992Publication History Published online1 May 2002Published inissue 1 October 199…
A nematic layer with opposite boundary conditions (unidirectional planar and homeotropic) is considered, having strong anchoring at the planar wall. It is known that a periodic deformation of splay-type can intervene between the aperiodic hybrid alignment and undistorted planar state as one decreases the film thicknes…
Abstract Evidence of chlorite weathering to halloysite appears to be limited. Trioctahedral ferruginous chlorite occurring in granitic rocks and in situ altered phases isolated from the horizons of two soils in southern Korea were studied by scanning and transmission electron microscope (SEM, TEM), chemical, and X-ray…
A thermogravimetric study was made of the reaction of the zirconia stabilizing oxides, In 2 O 3 , Sc 2 O 3 , Y 2 O 3 , and MgO , with molten NaVO 3 at 800°C under SO 3 partial pressures of 10 +2 to 10 −3 Pa. The melt composition is determined by: 2 NaVO 3 + SO 3 ⇄ V 2 O 5 + Na 2 SO 4 . No reaction of In 2 O 3 was foun…
A stable one-dimensional quasicrystal has been found in slowly cooled Al75Pd15Fe10. The one-dimensional quasicrystal can be derived from a two-dimensional decagonal quasicrystal by introducing a finite linear phason strain. The melting temperature of the one-dimensional quasicrystal was measured to be lower than that…
Abstract The dehydration and migration of the interlayer cation of the synthetic beidellite Na 0.7 Al 4.7 Si 7.3 O 20 -(OH) 4 ·nH 2 O, were studied with solid-state 23 Na and 27 Al MAS-NMR, heating stage XRD, and thermogravimetric analyses (TGA, DTA). The 23 Na MAS-NMR of Na-beidellite at 25°C displays a chemical shif…
Superconductivity in SnSe 2 {Co(ν‐C 5 H 5 ) 2 } 0.3 is notable for its high transition temperature—teh highest of any known organometallic intercalate—and because it is more three‐dimensional and less anisotropic than in any other previously reported intercalate. While intercalation of organometallic guests into layer…
Belite crystals give six sets of twinned α H ′l‐phase lamellae upon transition from α to α H ′. During further cooling a remelting reaction occurs within the crystals with heterogeneous nucleation and growth of a liquid phase on the lamella boundaries. The liquid, spherical in shape (∼0.1 μm in diameter), is made up o…
Lys-356 has been implicated as a critical residue for binding the C-6 phospho group of fructose 2,6-bisphosphate to the fructose-2,6-bisphosphatase domain of rat liver 6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase (Li, L., Lin, K., Correia, J., and Pilkis, S. J. (1992) J. Biol. Chem. 267, 16669-16675). To ascer…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNew polyaniline derivatives: poly(4,4'-diphenylamine methylenes) and poly(4,4'-diphenylimine methines)Wen Chang Chen and Samson A. JenekheCite this: Macromolecules 1992, 25, 22, 5919–5926Publication Date (Print):October 1, 1992Publication History Published online1 May 2002Pu…
Pulse surface breakdown (flashover) and conditioning characteristics of polycrystalline alumina and single crystal quartz in vacuum were investigated. An electrode system which greatly facilitates time-coordinated electrical and optical measurements of surface discharges along insulators was designed and validated. Th…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of transannular- and spiro-substituted cyclotriphosphazenes: x-ray crystal structures of 1,1-[N3P3(OCH2CF3)4{O2C12H8}], 1,3-[N3P3(OCH2CF3)4{O2C12H8}], 1,1-[N3P3(OCH2CF3)4{O2C10H6}], and 1,3-[N3P3(OCH2CF3)4}O2C10H6}]Harry R. Allcock, Michael L. Turner, and Karyn B.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReactions of 2-furyl, 2-thienyl, and N-methyl-2-pyrrolyl mercurials with [Et3NH][(.mu.-CO)(.mu.-RS)Fe2(CO)6] complexes. Synthesis of Fe2(CO)6 complexes with bridging .eta.1:.eta.2-furyl and thienyl ligandsDietmar Seyferth, Lea L. Anderson, Fernando Villafane, Martin Cowie, a…
This paper describes the results of numerical simulations for polydisperse sedimentation of equal-sized spheres, e.g. particles of different density. Using the Stokesian dynamics algorithm, mobility matrices are computed for random particle configurations and ensemble averages taken to calculate the mean mobility matr…
High-resolution Brillouin spectroscopy was used to study the elastic properties of ferroelastic ${\mathrm{K}}_{3}$Na(${\mathrm{SeO}}_{4}$${)}_{2}$. The temperature dependence of nine Brillouin modes of the acoustic phonons propagating in the [100], [010], [001], and [011] directions were measured in the temperature ra…
We have shown that clean γ- and α-Al2O3 films, prepared under relatively high pressure oxidation conditions, display methanol chemisorption properties and reactivity that are typical of powder alumina catalysts. Detailed vibrational and electronic information can be obtained for adsorbates on these thin-film oxides an…
We present a theory for calculation of the long-time self-diffusion coefficient of suspensions of interacting colloidal particles without hydrodynamic interactions. The theory follows the idea put forward in the preceding paper [Jan A. Leegwater and Grzegorz Szamel, Phys. Rev. A 46, 4999 (1992)]: The self-friction coe…
The time-differential perturbed-angular-correlation (PAC) method with ion-implanted $^{111}\mathrm{In}$ tracers was employed to study the hyperfine interactions of $^{111}\mathrm{Cd}$ nuclei in the rare-earth sesquioxides ${\mathrm{Sm}}_{2}$${\mathrm{O}}_{3}$, ${\mathrm{Gd}}_{2}$${\mathrm{O}}_{3}$, and ${\mathrm{Ho}}_…
The transformation of the decagonal quasicrystalline phase in Al62Cu20Co15Si3 and Al65Cu15Co20 to a normal crystalline phase was studied by electron diffraction and high-resolution electron microscopy. The transformation was induced by electron irradiation at room temperature. In the first stage the decagonal phase tr…