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At least 397 records · Page 22
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DOE OSTI2020

Materials Data on Tl3Sn by Materials Project

Tl3Sn crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Tl is bonded in a 12-coordinate geometry to eight equivalent Tl and four equivalent Sn atoms. There are a spread of Tl–Tl bond distances ranging from 3.44–3.60 Å. There are two shorter (3.46 Å) and two longer (3.52 Å) Tl–Sn bond lengths. Sn is bonded to twelve equivalent Tl atoms to form a mixture of corner and face-sharing SnTl12 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ti2TlC by Materials Project

Ti2TlC is H-Phase structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Ti is bonded in a 3-coordinate geometry to three equivalent Tl and three equivalent C atoms. All Ti–Tl bond lengths are 3.07 Å. All Ti–C bond lengths are 2.14 Å. Tl is bonded to six equivalent Ti and six equivalent Tl atoms to form TlTi6Tl6 cuboctahedra that share corners with six equivalent TlTi6Tl6 cuboctahedra, corners with six equivalent CTi6 octahedra, edges with six equivalent TlTi6Tl6 cuboctahedra, edges with six equivalent CTi6 octahedra, and faces with six equivalent TlTi6Tl6 cuboctahedra. The corner-sharing octahedral tilt angles are 22°. All Tl–Tl bond lengths are 3.18 Å. C is bonded to six equivalent Ti atoms to form CTi6 octahedra that share corners with six equivalent TlTi6Tl6 cuboctahedra, edges with six equivalent TlTi6Tl6 cuboctahedra, and edges with six equivalent CTi6 octahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CaTlCl5O7 by Materials Project

CaTlO7Cl5 crystallizes in the monoclinic C2/m space group. The structure is one-dimensional and consists of two CaTlO7Cl5 ribbons oriented in the (0, 0, 1) direction. Ca is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Ca–O bond distances ranging from 2.15–2.80 Å. Tl is bonded in a 6-coordinate geometry to four O and two equivalent Cl atoms. There are two shorter (2.18 Å) and two longer (2.32 Å) Tl–O bond lengths. Both Tl–Cl bond lengths are 3.01 Å. There are five inequivalent O sites. In the first O site, O is bonded in a bent 150 degrees geometry to one Ca and one Cl atom. The O–Cl bond length is 1.59 Å. In the second O site, O is bonded in a linear geometry to one Ca and one Cl atom. The O–Cl bond length is 1.52 Å. In the third O site, O is bonded in a single-bond geometry to one Cl atom. The O–Cl bond length is 1.49 Å. In the fourth O site, O is bonded in a trigonal planar geometry to one Ca and two equivalent Tl atoms. In the fifth O site, O is bonded in a distorted trigonal planar geometry to one Ca, one Tl, and one Cl atom. The O–Cl bond length is 1.67 Å. There are three inequivalent Cl sites. In the first Cl site, Cl is bonded in a single-bond geometry to one O atom. In the second Cl site, Cl is bonded in a distorted water-like geometry to one Tl and one O atom. In the third Cl site, Cl is bonded in a bent 120 degrees geometry to two O atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Tl3Cu by Materials Project

CuTl3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Cu is bonded to twelve equivalent Tl atoms to form CuTl12 cuboctahedra that share corners with twelve equivalent CuTl12 cuboctahedra, edges with twenty-four equivalent TlTl8Cu4 cuboctahedra, faces with six equivalent CuTl12 cuboctahedra, and faces with twelve equivalent TlTl8Cu4 cuboctahedra. All Cu–Tl bond lengths are 3.34 Å. Tl is bonded to four equivalent Cu and eight equivalent Tl atoms to form TlTl8Cu4 cuboctahedra that share corners with twelve equivalent TlTl8Cu4 cuboctahedra, edges with eight equivalent CuTl12 cuboctahedra, edges with sixteen equivalent TlTl8Cu4 cuboctahedra, faces with four equivalent CuTl12 cuboctahedra, and faces with fourteen equivalent TlTl8Cu4 cuboctahedra. All Tl–Tl bond lengths are 3.34 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Tl2S by Materials Project

Tl2S is trigonal omega-like structured and crystallizes in the trigonal R3 space group. The structure is two-dimensional and consists of three Tl2S sheets oriented in the (0, 0, 1) direction. there are six inequivalent Tl1+ sites. In the first Tl1+ site, Tl1+ is bonded in a 3-coordinate geometry to three S2- atoms. There are a spread of Tl–S bond distances ranging from 2.92–3.01 Å. In the second Tl1+ site, Tl1+ is bonded in a 3-coordinate geometry to three S2- atoms. There are a spread of Tl–S bond distances ranging from 2.92–3.01 Å. In the third Tl1+ site, Tl1+ is bonded in a 3-coordinate geometry to three S2- atoms. There are a spread of Tl–S bond distances ranging from 2.92–3.01 Å. In the fourth Tl1+ site, Tl1+ is bonded in a 3-coordinate geometry to three S2- atoms. There are two shorter (2.94 Å) and one longer (3.08 Å) Tl–S bond lengths. In the fifth Tl1+ site, Tl1+ is bonded in a 3-coordinate geometry to three S2- atoms. There are two shorter (2.94 Å) and one longer (3.08 Å) Tl–S bond lengths. In the sixth Tl1+ site, Tl1+ is bonded in a 3-coordinate geometry to three S2- atoms. There are a spread of Tl–S bond distances ranging from 2.93–3.08 Å. There are five inequivalent S2- sites. In the first S2- site, S2- is bonded to six Tl1+ atoms to form edge-sharing STl6 octahedra. In the second S2- site, S2- is bonded to six Tl1+ atoms to form edge-sharing STl6 octahedra. In the third S2- site, S2- is bonded to six Tl1+ atoms to form edge-sharing STl6 octahedra. In the fourth S2- site, S2- is bonded to six Tl1+ atoms to form edge-sharing STl6 octahedra. In the fifth S2- site, S2- is bonded to six Tl1+ atoms to form distorted edge-sharing STl6 pentagonal pyramids.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Tl3Ir by Materials Project

IrTl3 crystallizes in the cubic Pm-3n space group. The structure is three-dimensional. Ir is bonded to twelve equivalent Tl atoms to form a mixture of edge and face-sharing IrTl12 cuboctahedra. All Ir–Tl bond lengths are 3.21 Å. Tl is bonded in a 6-coordinate geometry to four equivalent Ir and two equivalent Tl atoms. Both Tl–Tl bond lengths are 2.87 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on HfTl by Materials Project

HfTl crystallizes in the hexagonal P-6m2 space group. The structure is three-dimensional. Hf is bonded to six equivalent Hf and six equivalent Tl atoms to form HfHf6Tl6 cuboctahedra that share corners with eighteen equivalent HfHf6Tl6 cuboctahedra, edges with six equivalent HfHf6Tl6 cuboctahedra, edges with twelve equivalent TlHf6Tl6 cuboctahedra, faces with eight equivalent HfHf6Tl6 cuboctahedra, and faces with twelve equivalent TlHf6Tl6 cuboctahedra. All Hf–Hf bond lengths are 3.23 Å. All Hf–Tl bond lengths are 3.20 Å. Tl is bonded to six equivalent Hf and six equivalent Tl atoms to form TlHf6Tl6 cuboctahedra that share corners with eighteen equivalent TlHf6Tl6 cuboctahedra, edges with six equivalent TlHf6Tl6 cuboctahedra, edges with twelve equivalent HfHf6Tl6 cuboctahedra, faces with eight equivalent TlHf6Tl6 cuboctahedra, and faces with twelve equivalent HfHf6Tl6 cuboctahedra. All Tl–Tl bond lengths are 3.23 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Tl3Ge by Materials Project

Tl3Ge is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Tl is bonded to eight equivalent Tl and four equivalent Ge atoms to form distorted TlTl8Ge4 cuboctahedra that share corners with twelve equivalent TlTl8Ge4 cuboctahedra, edges with eight equivalent GeTl12 cuboctahedra, edges with sixteen equivalent TlTl8Ge4 cuboctahedra, faces with four equivalent GeTl12 cuboctahedra, and faces with fourteen equivalent TlTl8Ge4 cuboctahedra. All Tl–Tl bond lengths are 3.41 Å. All Tl–Ge bond lengths are 3.41 Å. Ge is bonded to twelve equivalent Tl atoms to form distorted GeTl12 cuboctahedra that share corners with twelve equivalent GeTl12 cuboctahedra, edges with twenty-four equivalent TlTl8Ge4 cuboctahedra, faces with six equivalent GeTl12 cuboctahedra, and faces with twelve equivalent TlTl8Ge4 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Tl3Bi by Materials Project

Tl3Bi is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Tl is bonded to eight equivalent Tl and four equivalent Bi atoms to form distorted TlTl8Bi4 cuboctahedra that share corners with twelve equivalent TlTl8Bi4 cuboctahedra, edges with eight equivalent BiTl12 cuboctahedra, edges with sixteen equivalent TlTl8Bi4 cuboctahedra, faces with four equivalent BiTl12 cuboctahedra, and faces with fourteen equivalent TlTl8Bi4 cuboctahedra. All Tl–Tl bond lengths are 3.56 Å. All Tl–Bi bond lengths are 3.56 Å. Bi is bonded to twelve equivalent Tl atoms to form BiTl12 cuboctahedra that share corners with twelve equivalent BiTl12 cuboctahedra, edges with twenty-four equivalent TlTl8Bi4 cuboctahedra, faces with six equivalent BiTl12 cuboctahedra, and faces with twelve equivalent TlTl8Bi4 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Tl3Zn by Materials Project

ZnTl3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Zn is bonded to twelve equivalent Tl atoms to form ZnTl12 cuboctahedra that share corners with twelve equivalent ZnTl12 cuboctahedra, edges with twenty-four equivalent TlTl8Zn4 cuboctahedra, faces with six equivalent ZnTl12 cuboctahedra, and faces with twelve equivalent TlTl8Zn4 cuboctahedra. All Zn–Tl bond lengths are 3.39 Å. Tl is bonded to four equivalent Zn and eight equivalent Tl atoms to form TlTl8Zn4 cuboctahedra that share corners with twelve equivalent TlTl8Zn4 cuboctahedra, edges with eight equivalent ZnTl12 cuboctahedra, edges with sixteen equivalent TlTl8Zn4 cuboctahedra, faces with four equivalent ZnTl12 cuboctahedra, and faces with fourteen equivalent TlTl8Zn4 cuboctahedra. All Tl–Tl bond lengths are 3.39 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on EuTl3 by Materials Project

EuTl3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Eu is bonded to twelve equivalent Tl atoms to form EuTl12 cuboctahedra that share corners with twelve equivalent EuTl12 cuboctahedra, edges with twenty-four equivalent TlEu4Tl8 cuboctahedra, faces with six equivalent EuTl12 cuboctahedra, and faces with twelve equivalent TlEu4Tl8 cuboctahedra. All Eu–Tl bond lengths are 3.50 Å. Tl is bonded to four equivalent Eu and eight equivalent Tl atoms to form distorted TlEu4Tl8 cuboctahedra that share corners with twelve equivalent TlEu4Tl8 cuboctahedra, edges with eight equivalent EuTl12 cuboctahedra, edges with sixteen equivalent TlEu4Tl8 cuboctahedra, faces with four equivalent EuTl12 cuboctahedra, and faces with fourteen equivalent TlEu4Tl8 cuboctahedra. All Tl–Tl bond lengths are 3.50 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on TlRe by Materials Project

ReTl crystallizes in the orthorhombic Imma space group. The structure is three-dimensional. Re is bonded in a 10-coordinate geometry to two equivalent Re and eight equivalent Tl atoms. Both Re–Re bond lengths are 2.48 Å. There are a spread of Re–Tl bond distances ranging from 3.05–3.15 Å. Tl is bonded to eight equivalent Re and four equivalent Tl atoms to form a mixture of distorted edge, face, and corner-sharing TlTl4Re8 cuboctahedra. There are two shorter (3.04 Å) and two longer (3.10 Å) Tl–Tl bond lengths.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Tl3V by Materials Project

VTl3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. V is bonded to twelve equivalent Tl atoms to form VTl12 cuboctahedra that share corners with twelve equivalent VTl12 cuboctahedra, edges with twenty-four equivalent TlTl8V4 cuboctahedra, faces with six equivalent VTl12 cuboctahedra, and faces with twelve equivalent TlTl8V4 cuboctahedra. All V–Tl bond lengths are 3.29 Å. Tl is bonded to four equivalent V and eight equivalent Tl atoms to form TlTl8V4 cuboctahedra that share corners with twelve equivalent TlTl8V4 cuboctahedra, edges with eight equivalent VTl12 cuboctahedra, edges with sixteen equivalent TlTl8V4 cuboctahedra, faces with four equivalent VTl12 cuboctahedra, and faces with fourteen equivalent TlTl8V4 cuboctahedra. All Tl–Tl bond lengths are 3.29 Å.

36 MATERIALS SCIENCE↗
NASA NTRS1977

'Mysterite' - A late condensate from the solar nebula

An attempt is made to clarify the nature of 'mysterite', a material that had been postulated to explain the overabundance of Tl, Bi, and Ag in certain chondrites. Four dark clasts and a vein sample from the H6 chondrite Supuhee were analyzed by radiochemical neutron activation analysis for Ag, Au, Bi, Br, Cd, Cs, Ge, In, Ir, Ni, Os, Rb, Re, Sb, Se, Te, Tl, and Zn. One of the clasts is enriched in all volatile elements, while the other four samples are enriched only in the siderophile volatiles Ag, Bi, and Tl. The enrichments range up to 100 times typical H6 chondrite abundances. The proportions of Ag, Bi, and Tl suggest the presence of at least two, Tl-rich and Tl-poor, varieties of mysterite. The former seems to dominate in Supuhee and Krymka, and the latter in Mezo-Madaras. Apparently mysterite is a late condensate from the solar nebula that collected volatiles left behind by earlier generations of chondrites. It was incorporated in Supuhee and perhaps in other chondrites (mainly of low petrologic types) during brecciation events.

Higuchi, H.↗
NASA NTRS1983

Chemical and physical studies of type 3 chondrites. II Thermoluminescence of sixteen type 3 ordinary chondrites and relationships with oxygen isotopes

Thermoluminescence (TL) sensitivity values for sixteen type 3 ordinary chondrites, fourteen of them from Antarctica, have been measured. The values obtained (normalized to the TL sensitivity of the Dhajala meteorite) range from 1.6 (Allan Hills A77216) to 0.010 (Allan Hills A77176), and include two (Reckling Peak A80207 and Allan Hills A77176) that are particularly low. They fill a hiatus in the TL distribution that previously existed between St. Mary's County and Bishunpur, the latter being a meteorite with one of the lowest TL sensitivities known. The histogram of TL sensitivity values now shows a single distribution with higher values preferred; it resembles the histogram for L chondrites occupying the petrologic types 3, 4, 5, and 6. There is a tendency for the TL sensitivity of meteorites to decrease as delta O-18 increases. Theoretically, it is possible that the range of delta O-18 values observed may reflect progressive loss of O in the form of CO at very low temperatures, but very restrictive physical conditions and a complex history seem to be required.

Sears, D. W. G.↗
NASA NTRS1984

Chemical and physical studies of type 3 chondrites. III Chondrules from the Dhajala H3.8 chondrite

Thermoluminescence (TL) properties have been measured in 58 chondrules separated from the Dhajala H3.8 chondrite. The pyrolytic chondrules are noted to have higher mass-normalized TL values than nonpyrolytic ones. Significant correlations are noted between log(TL) and the bulk CaO, Al2O3, and MnO content of the chondrules. These, together with correlations of log(TL) with the CaO, Al2O3, SiO2 and normative anorthite content of the chondrule glass, indicate an association of the TL and the abundance and position of mesostasis. It is suggested that the TL level in a given chondrule is governed by its bulk composition and metamorphism, and it is hypothesized that the devitrification resistance of unequilibrated chondrule mesostasis explains the unequilibration of certain chondrules in type 3 ordinary chondrites.

Sears, D. W. G.↗
NASA NTRS1985

The read-out system of spatial distribution of thermoluminescence in meteorites

The thermoluminescence (TL) technique used for dating the terrestrial age of meteorites is based on the TL fading of interior samples. The depth dependence of the TL for Antarctic meteorites with fusion crust is measured. Usually, meteorites are powdered and their TL measured under a photomultiplier. In this case, a TL spatial distribution of a cross section of antarctic meteorites is measured using a read out system of spatial distribution of TL, since a meteorite is made up of inhomogeneous material. Antarctic meteorites MET-78028(L6) and ALH-77278(L13) are used.

Ninagawa, K.↗
NASA NTRS1986

The thermoluminescence sensitivity-metamorphism relationship in ordinary chondrites - Experimental data on the mechanism and implications for terrestrial systems

Hydrothermal annealing experiments have been performed on samples of the Sharps meteorite in order to investigate the mechanism responsible for the metamorphism-related, 10-to-the-5th-fold range in the thermoluminescence (TL) sensitivity in ordinary chondrites. Duplicate 50 mg samples of meteorite were annealed under the following conditions: (1) 168 h at 785 C and 1 kbar; (2) the same time, temperature and pressure, but with 2 wt pct water; (3) 174 h at 855 C and 0.77 kbar with 2 wt pct water and 2 molal sodium disilicate (NadiSi); (4) the same time, temperature and pressure as the preceding samples, but with 10 wt pct H2O and 2 molal NadiSi. Samples annealed under the first three sets of conditions showed little or no change in their TL sensitivities, however the samples annealed with 10 wt pct water and 2 molal NadiSi showed a three-fold to 10-fold increase in TL sensitivity, and the temperature of the TL peak was suggestive of feldspar in the high-temperature form. It is suggested that these data are consistent with the TL sensitivity-metamorphism relationship in ordinary chondrites being due to the formation of the TL phosphor, feldspar, by the crystallization of chondrule glass.

Guimon, R. K.↗