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.
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 2023.