GLORIA

GEOMAR Library Ocean Research Information Access

X

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • AIP Publishing  (2)
Material
Publisher
  • AIP Publishing  (2)
Person/Organisation
Language
Years
Subjects(RVK)
  • 1
    Online Resource
    Online Resource
    Structure of catalysts: Determination by EPR and Fourier analysis of the extended x-ray absorption fine structure
    AIP Publishing ; 1974
    In:  Applied Physics Letters Vol. 24, No. 2 ( 1974-01-15), p. 45-47
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 24, No. 2 ( 1974-01-15), p. 45-47
    Abstract: An alumina-supported CuCr catalyst was examined with the extended x-ray absorption fine-structure (EXAFS) technique. This is a new technique which can determine the chemical states and near-neighbor environments of the separate Cu and Cr atomic species. Cu was found to occupy both tetrahedral and octahedral sites in the supporting alumina lattice while Cr was found only in octahedral sites. The valence state was Cr+5 in the fresh catalyst which changed to Cr+6 in the exhaust-cycled material. Confirmation of the valence state assignment was obtained by EPR. Fourier analysis of the EXAFS produced separate radial structure functions for the Cu and Cr atoms since the experiment measures the properties of the individual atomic species rather than those of the structure as a whole. Significant differences were observed by both techniques between fresh and exhaust-cycled material.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/1.1655087
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 1974
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 2
    Online Resource
    Online Resource
    X-Ray Diffractometry of Low-Temperature Phase Transformations in Strontium Titanate
    AIP Publishing ; 1964
    In:  Journal of Applied Physics Vol. 35, No. 7 ( 1964-07-01), p. 2212-2215
    Details
    In: Journal of Applied Physics, AIP Publishing, Vol. 35, No. 7 ( 1964-07-01), p. 2212-2215
    Abstract: The lattice parameters of single-crystal SrTiO3 were determined by x-ray diffraction as a function of temperature from 4.2° to 300°K. In addition to the normal cubic structure three significant regions were found. From 65° to 100°K a tetragonal modification exists (c/a=1.00056), from 35° to 55°K line splitting consistent with orthorhombic symmetry was observed, and at 10°K an anomalous maximum in the lattice parameter vs temperature curve was found which suggested a third structure transformation. In the tetragonal region (at 78°K) various domain configurations were photographed with a polarizing microscope.
    Type of Medium: Online Resource
    ISSN: 0021-8979 , 1089-7550
    URL: Article
    DOI: 10.1063/1.1702820
    Language: English
    Publisher: AIP Publishing
    Publication Date: 1964
    detail.hit.zdb_id: 220641-9
    detail.hit.zdb_id: 3112-4
    detail.hit.zdb_id: 1476463-5
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...