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DOE OSTI2020

Materials Data on PbF2 by Materials Project

PbF2 is Cotunnite structured and crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Pb2+ is bonded in a 7-coordinate geometry to seven F1- atoms. There are a spread of Pb–F bond distances ranging from 2.43–2.67 Å. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded to four equivalent Pb2+ atoms to form a mixture of edge and corner-sharing FPb4 tetrahedra. In the second F1- site, F1- is bonded in a distorted trigonal non-coplanar geometry to three equivalent Pb2+ atoms.

36 MATERIALS SCIENCE↗

DOE OSTI2020

Materials Data on PbF2 by Materials Project

PbF2 is Fluorite structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Pb2+ is bonded in a body-centered cubic geometry to eight equivalent F1- atoms. All Pb–F bond lengths are 2.60 Å. F1- is bonded to four equivalent Pb2+ atoms to form a mixture of edge and corner-sharing FPb4 tetrahedra.

36 MATERIALS SCIENCE↗

DOE OSTI2020

Materials Data on PbF2 by Materials Project

PbF2 is Fluorite structured and crystallizes in the orthorhombic Aea2 space group. The structure is three-dimensional. Pb2+ is bonded in a body-centered cubic geometry to eight equivalent F1- atoms. There are a spread of Pb–F bond distances ranging from 2.54–2.72 Å. F1- is bonded to four equivalent Pb2+ atoms to form a mixture of corner and edge-sharing FPb4 tetrahedra.

36 MATERIALS SCIENCE↗

NASA NTRS1969

Thermodynamics of vaporization of GeF2, SnF2 and PbF2 and bond dissociation energies of group IVA fluorides

Group 4A difluorides vaporization thermodynamics and bond dissociation energies, tabulating mass spectra, vapor composition, reaction enthalpies, heats of polymerization and thermodynamic functions

Hastie, J. W.↗

NASA NTRS1975

A study of phase transitions in lead difluoride by use of polychromatic X-ray diffraction

A polychromatic X-ray diffraction technique was used to obtain patterns of alpha-PbF2 and beta-PbF2. The results obtained at room temperature and 314 C at 1 atm, and at room temperature at 5.5 kbar, are in good agreement with published data. The advantages of the technique for high-temperature and high-pressure work are discussed.

Mahajan, V. K.↗

DOE OSTI2025

Dual Readout in Homogenous Inorganic Scintillators for Precision Calorimeters

Homogeneous inorganic scintillator-based calorimeters are the gold standard for electromagnetic energy resolution, but often degrade the hadronic energy resolution achievable at colliders. By incorporating the dual readout technique, we seek to improve the hadronic energy resolution of these calorimeters through the measurement and separation of the scintillation and Cherenkov light in hadronic showers. In April 2024, CalVision performed single-crystal tests using the electron test beam at DESY. Using a single delay line technique for waveform analysis, sufficient cerenkov light can be extracted to fully capitalize on the dual readout technique. This talk will present the results of PWO, BGO, BSO, PbF2, and two novel scintillating glasses.

Anderson, Thomas [Virginia U.]↗