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Description

Bruker D8 A25 DaVinci X-ray Diffractometer with CuKα radiation. LynxEye™ SuperSpeed Detector. 90 position sample changer.

Well suited for:
  • Fast XRD scans for phase identification
  • Samples that can wait in a queue for hours before being measured (the engineer will load the samples into the instrument every morning and afternoon)
  • Energy-discriminating detector makes it useful also for the fluorescing elements (Fe, Co, Mn)
Not so good for:
  • Samples that change fast in air (then the D8 Focus may be better to use, due to the booking system)
  • Samples that doesn't fit the standard sample holders
  • Measurements where you want to avoid the Kα2 contributions (then the A-unit is recommended)

Photo: Kristin Høydalsvik Wells

Specifications, standard powder diffraction set-up (all days except Wednesdays)
  • Bragg-Brentano geometry

  • θ–θ operating mode

  • 2.5° primary and secondary Soller slits
  • Data collection from 5 to 105° 2θ (typically)

  • Variable divergence slit: "V6" means that the divergence slit (the slit between the X-ray source and the sample) opens automatically such that the illuminated length on the sample always remains 6 mm).

Standard measurements:
  • Highly crystalline samples: step size: ca. 0.010 °/step
  • Crystalline samples: step size: ca. 0.013 °/step
  • Low crystallinity samples: step size: ca. 0.044 °/step

(for exact numbers, please consult the measurement PC - ask Lab Manager or substitutes for help if needed).

Specifications, grazing-incidence diffraction (GIXRD) set-up (Wednesdays, except holiday periods)

Well-suited for studying the structure of polycrystalline films on substrates.

  • Göbel mirror → parallel beam
  • Incident angle fixed at grazing angle (for example 0.5 to 3°)
  • Scanning detector angle (typically 5 to 80 degrees 2θ)



Before you begin

  • Equipment may not be used without training. See XRD-lab info.

 

 

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