Phys. Rev. B 57, 2655–2658 (1998)Single crystal of colloidal silica particles in a dilute aqueous dispersion as studied by a two-dimensional ultrasmall-angle x-ray scatteringReceived 6 August 1997; published in the issue dated 1 February 1998 A two-dimensional ultrasmall-angle x-ray-scattering apparatus was constructed with a full width at the half maximum of the intensity profile of the incident x-ray beam being about 17 s of arc. This apparatus enabled us to obtain the scattering intensity as a function of the scattering vector. The scattering profile of a colloidal crystal of silica particles in an aqueous dispersion was studied and analyzed with the aid of a method by Busing and Levy. The diffraction planes corresponding to 22 scattering peaks observed were uniquely identified; The lattice system was determined to be body-centered-cubic with a lattice constant of 3800Å and its [11¯1] was parallel to the capillary axis. © 1998 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.57.2655
DOI:
10.1103/PhysRevB.57.2655
PACS:
82.70.Dd, 61.10.Eq
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