Researchers from Lawrence Livermore National Laboratory, University of Nevada Las Vegas, Argonne National Laboratory, and University of Chicago have found a subtle phase transition in 1,3,5-Triamino-2,4,6- trinitrobenzene (TATB). TATB is an important compound in the energetic materials… more
Congratulations to Professor Yogesh K. Vohra, long time HPCAT user and NNSA-SSAA partner, and team for recognition of their work in part performed at HPCAT. Their article, authored by Samuel L. Moore, Gopi K. Samudrala, Shane A. Catledge, and Yogesh K. Vohra, "… more
The satellite of the 4d3/2 – 2p1/2 emission line (Lγ) has been traditionally interpreted as a signature of the bare (unscreened) magnetic moment of the 4f electrons in the lanthanides [see e.g. B. Maddox et al.,… more
LLNL and HPCAT scientists recently published an article in RSI describing a high-speed multichannel pyrometer system they developed for measuring the temperature of samples in laser heating experiments. The system has been used with success at HPCAT. The team is looking into assembling a… more
Jarosite, KFe3(OH)6(SO4)2, contains perfect 2D kagomé lattices of Fe3+ ions. The geometry of the kagomé lattice engenders magnetic frustration in antiferromagnets, yet jarosite still orders magnetically at 65 K. Given that magnetic frustration can cause exotic emergent phenomena, the magnetism… more
When compressed above megabar pressures (>100 GPa), glasses may undergo structural transitions into more densely packed networks that differ from those at ambient pressure. Inelastic x-ray scattering (IXS, or X-ray Raman scattering), which can probe core electron excitation from glasses in a… more
Recent discoveries of several stable dense hydrous minerals at high pressure–temperature conditions have led to an important implication of a massive water reservoir in the Earth’s lower mantle. A research team used HPCAT facility and demonstrated that (Fe,Al)OOH can be stabilized in a hexagonal… more