Library

feed icon rss

Your email was sent successfully. Check your inbox.

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

Proceed reservation?

Export
Filter
  • 1990-1994  (4)
Material
Years
Year
  • 1
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A system for analyzing and refining the crystal structure of a submicrometer-sized specimen has been developed at the Photon Factory, KEK, employing a Laue method with an imaging plate. The system was evaluated using two molybdenum spheres with diameters of 0.8 μm and 0.27 μm3 in volume. The result showed that the isotropic temperature factors of both spheres were successfully refined, and that one of the samples was found to be twinned. The smaller domain of the twin was determined to be 0.02 μm3 in volume, which means that the smaller domain is composed of only 109 Mo atoms. The system was applied to a 5-μm-sized icosahedral CVD diamond as a first application. Analysis of several Laue patterns revealed that the sample is composed of more than 17 domains. Among them, 16 domains are twinned with each other, and the mode of twinning is of the spinel twin type.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 24 (1991), S. 340-348 
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: A system has been developed for the analysis of the structure of a submicrometer-sized single-crystal using synchrotron radiation (SR) at the Photon Factory (PF), KEK. The Laue method combined with an imaging plate was employed for the collection of diffracted intensities. To reduce background, the experiment was carried out in a vacuum and with a very thinly collimated incident X-ray beam. The system has been shown to reach a level where a molybdenum sphere with diameter as small as 0.8 μm was found to be twinned and the volume ratio of the twin domains was determined, together with an isotropic temperature factor, which was comparable with the value determined in the same experiment on another single-crystal sphere of almost the same size. It was in good agreement with that determined by a powder diffraction study. The present study showed that any single-crystal detectable under an optical microscope can be analysed and, further, that the diffraction intensities from a crystal with volume of 0.02 μm3, which is composed of 109 atoms, can be detected.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 49 (1993), S. 172-179 
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Physics and chemistry of minerals 21 (1994), S. 6-11 
    ISSN: 1432-2021
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Abstract Circular diffuse scattering appears when the incommensurate phase of akermanite transforms partly to either the normal phase or the commensurate phase by exchanging Ca atoms for larger alkali-earth atoms such as Sr or by exchanging Mg atoms for larger atoms such as Fe and/or by increasing the temperature. The scattering effect has been investigated by using an optical diffraction method. To induce the appearance of circular satellite reflections around the Bragg reflections, the modulation waves must repeat with a phase difference in one direction, x or y, together with a wavelength change. If the modulation waves repeat with phase differences in both x and y directions, circular satellite reflection will be induced without varying the modulation wavelength. Experimental reproduction of circular diffuse scattering shows that this phenomenon is ascribed to modulation waves repeating with a layer-to-layer phase difference and with a constant phase difference within each layer of the akermanite structure.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...