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TlF is TlF-II structured and crystallizes in the orthorhombic Pbcm space group. The structure is two-dimensional and consists of one TlF sheet oriented in the (0, 0, 1) direction. Tl1+ is bonded in a 5-coordinate geometry to five equivalent F1- atoms. There are a spread of Tl–F bond distances ranging from 2.50–3.40 Å. F1- is bonded in a 4-coordinate geometry to five equivalent Tl1+ atoms.
TlF is gamma CuTi structured and crystallizes in the tetragonal P4/nmm space group. The structure is two-dimensional and consists of one TlF sheet oriented in the (0, 0, 1) direction. Tl1+ is bonded to five equivalent F1- atoms to form a mixture of distorted edge and corner-sharing TlF5 square pyramids. There are one shorter (2.49 Å) and four longer (2.79 Å) Tl–F bond lengths. F1- is bonded to five equivalent Tl1+ atoms to form a mixture of distorted edge and corner-sharing FTl5 trigonal bipyramids.
TlF is gamma CuTi structured and crystallizes in the orthorhombic Pma2 space group. The structure is two-dimensional and consists of one TlF sheet oriented in the (0, 0, 1) direction. there are two inequivalent Tl1+ sites. In the first Tl1+ site, Tl1+ is bonded to five F1- atoms to form a mixture of distorted corner and edge-sharing TlF5 square pyramids. There are a spread of Tl–F bond distances ranging from 2.49–2.92 Å. In the second Tl1+ site, Tl1+ is bonded to five F1- atoms to form a mixture of distorted corner and edge-sharing TlF5 square pyramids. There are a spread of Tl–F bond distances ranging from 2.49–2.94 Å. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded to five Tl1+ atoms to form a mixture of distorted corner and edge-sharing FTl5 trigonal bipyramids. In the second F1- site, F1- is bonded to five Tl1+ atoms to form a mixture of distorted corner and edge-sharing FTl5 trigonal bipyramids.
TlF is Halite, Rock Salt structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Tl1+ is bonded to six equivalent F1- atoms to form a mixture of corner and edge-sharing TlF6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Tl–F bond lengths are 2.84 Å. F1- is bonded to six equivalent Tl1+ atoms to form a mixture of corner and edge-sharing FTl6 octahedra. The corner-sharing octahedral tilt angles are 0°.
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The Cold molecule Nuclear Time-Reversal EXperiment (CeNTREX) is a new effort aiming for a significant increase in sensitivity over the best present upper bounds on the strength of hadronic time reversal (T) violating fundamental interactions. The experimental signature will be shifts in nuclear magnetic resonance frequencies of 205 Tl in electrically-polarized thallium fluoride (TlF) molecules. Here we describe the motivation for studying these T-violating interactions and for using TlF to do so. To achieve higher sensitivity than earlier searches for T-violation in TlF, CeNTREX uses a cryogenic molecular beam source, optical state preparation and detection, and modern methods of coherent quantum state manipulation. Details of the measurement scheme and the current state of the apparatus are presented, with quantitative measurements of the TlF beam. Lastly, the estimated sensitivity and methods to control systematic errors are discussed.
PbO is TlF-II structured and crystallizes in the orthorhombic Pbcm space group. The structure is two-dimensional and consists of one PbO sheet oriented in the (0, 0, 1) direction. Pb2+ is bonded in a distorted rectangular see-saw-like geometry to four equivalent O2- atoms. There are a spread of Pb–O bond distances ranging from 2.26–2.51 Å. O2- is bonded in a distorted see-saw-like geometry to four equivalent Pb2+ atoms.
PbO is TlF-II structured and crystallizes in the orthorhombic Pca2_1 space group. The structure is two-dimensional and consists of one PbO sheet oriented in the (0, 0, 1) direction. Pb2+ is bonded in a distorted T-shaped geometry to three equivalent O2- atoms. There are one shorter (2.25 Å) and two longer (2.26 Å) Pb–O bond lengths. O2- is bonded in a trigonal planar geometry to three equivalent Pb2+ atoms.