Single Crystal X-ray Diffraction

Equipment

Bruker AXS Smart APEX I:

Three circle diffractometer with molybdenum X-ray tube.
High sensitive 4k Chip: Maximum 2theta 78° / single frame.
Measuring range: Maximum 2theta 150°.
Low temperature device: Cryostream Plus, Oxford Cryosystems, temperature range 80 - 500 K.
Software for evaluation and analysis of any kind of twinned crystals.

Bruker AXS Smart APEX II + Incoatec IµS:

Three circle diffractometer with conventional X-ray tube
(Mo) and Incoatec Microfocus Source IµS (Cu), changeable use.
High sensitive 4k Chip: Maximum 2theta 78° / single frame.
Measuring range: Maximum 2theta 145° (Cu), 120° (Mo).
Low temperature device: N-Helix, Oxford Cryosystems, temperature range 28 - 300 K.
Video system for precise measuring of crystals (numerical absorption correction).
Software for evaluation and analysis of modulated structures (commensurable and incommensurable).

Application:

Structural characterisation of new compounds with the help of X-ray diffraction methods on single crystals: Measurments of samples sensitive to air and moisture. Low temperature investigations for analysis of phase transitions, structure determination of temperature sensitive compounds, investigation of aperiodic structures und complex twinned crystals.

O. V. Magdysyuk, J. Nuss, M. Jansen: Modulated crystal structure of Pr₂SbO₂
Acta Crystallogr., Sect. B: Struct. Sci. 69 (2013) 547-555. doi:10.1107/S2052519213029436 (electronic reprint)

J. Nuss: Higher Dimensional Crystallography: Treatment of Composite Crystals Using Four Dimensions in Space
Lab Report SC-XRD 46, Bruker AXS GmbH (2011).

J. Nuss, S. Pfeiffer, S. van Smaalen, M. Jansen: Structures of incommensurate and commensurate composite
crystals Rb_xMnO₂ (x = 1.3711, 1.3636)
Acta Crystallogr., Sect. B: Struct. Sci. 66 (2010) 27-33. doi:10.1107/S0108768109053312 (electronic reprint)

J. Nuss, N. Z. Ali, M. Jansen: Structure of RbFeO₂, refined from a reticular pseudomerohedrally twinned crystal with six domains
Acta Crystallogr. B 63 (2007) 719-725. doi:10.1107/S0108768107037147 (electronic reprint)

J. Nuss, M. Jansen: Reticular merohedral twinning within the La₉Sb₅O₅ structure family: structure of Pr₉Sb₅O₅, Sm₉Sb₅O₅ and Dy₉Sb₅O₅
Acta Crystallogr. B 63 (2007) 843-849. doi:10.1107/S0108768107051282 (electronic reprint)