Verneite (Na2Ca3Al2F14), a pinhole for helium
Verneite (Na2Ca3Al2F14) is a recently discovered aluminofluoride mineral, though the synthetic compound is widely known as "NaCaAlF". We have recently studied its behaviour under pressure and found clear evidence that helium can enter into its structure, but no other gas or molecule. In this proposal we wish to carry out high pressure neutron diffraction measurements to 10 GPa in order to locate helium inside verneite, determine the structural pressure dependence of Na2Ca3Al2F14:He and see if the incorporated helium "freezes" at low temperature. Neutron diffraction is ideal for this purpose and ILL is the only place where such an experiment can be carried out.
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Download DataThe recommended format for citing this dataset in a research publication is in the following format:
KLOTZ Stefan; AMAND Louis; Thomas C. Hansen and PIETRUCCI Fabio. (2021). Verneite (Na2Ca3Al2F14), a pinhole for helium. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-24-648
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