Webinar summary
This webinar makes an evidence-based case that a modern benchtop single crystal diffractometer is within reach for labs that have assumed they can’t afford one. The presenters introduce the Rigaku XtaLAB mini II at a price point in the low six figures and tackle the only question that really matters to researchers: does it deliver publishable data? Their answer is yes. The instrument uses a molybdenum fine-focus sealed tube, a curved graphite monochromator, a simple, collision-safe two-axis goniometer with a fixed 54° chi, and a hybrid photon-counting detector with no dark noise. It fits on a bench, runs with a small chiller, has interlocks that prevent accidental X-ray exposure, requires little maintenance, and is compatible with standard cryosystems. The control and data-reduction software automates screening, indexing, strategy calculation, integration, scaling and even structure solution as data accumulate, so beginners can get competent results without a resident crystallographer hovering over their shoulder.
A live demo walked through mounting and centering an organic standard and showed the software auto-indexing, proposing a multi-scan strategy, and reprocessing every ~25 images while the dataset grew—exactly the kind of hand-holding that lowers the barrier for first-time users. They also confirmed you can schedule variable-temperature series, analyze twins, and handle air-sensitive samples with a cryostream. There are limits: the system is Mo-only and the beam is weaker than a microfocus rotating-anode or a beamline. That means very small or poorly diffracting crystals take time, and a subset will be better served by a higher-flux source. But the presenters were direct about that trade-off and showed where the XtaLAB mini II succeeds anyway.
Performance examples were the backbone of the presentation. Low-symmetry organics in P1 and P1 reached ~99% completeness and sensible R1 values with modest crystal sizes and overnight runs. An especially nasty thin, streaky crystal still yielded a solved structure after ~39 hours—proof that time can substitute for flux up to a point. In contrast, organometallics with stronger scattering solved cleanly in 2–3 hours with R1 near 3–4%.
Users reported large primitive cells into the ~40 Å range being resolvable on the fixed detector. One testimonial came from Prof. Claire Besson (SUNY Binghamton), who brought SCXRD in-house on startup funds and, with graduate students, measured ~40 structures in short order—everything from uranium complexes to 2D materials—rarely needing cryo, and even solving a twinned ~20×20 µm needle after a week of acquisition. Another came from Prof. Jason Halfen (UW–Eau Claire), who has run more than 600 samples over five years in an undergraduate environment, with students routinely determining their own structures as part of capstone labs, minimal service interventions, and the original tube still in use—clear signals of low operating cost. Pierre emphasized remote help via TeamViewer for strategy, indexing, and tricky datasets, plus training that leaves new owners genuinely independent.
If your lab mostly needs routine small-molecule structures and you want the speed and control of doing SCXRD in-house, the XtaLAB mini II is a pragmatic way to get there. For most use cases—teaching labs, synthetic groups, and departments tired of shipping crystals out—the webinar shows the XtaLAB mini II producing IUCr-grade data reliably, safely, and at a price many assumed was out of reach.
