Search NASA⌕ Search

DOE OSTI · 1717368

Materials Data on Nd5Te7WCl3O23 by Materials Project

Abstract

Nd5WTe7O23Cl3 crystallizes in the monoclinic C2 space group. The structure is three-dimensional. there are six inequivalent Nd3+ sites. In the first Nd3+ site, Nd3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Nd–O bond distances ranging from 2.36–2.71 Å. In the second Nd3+ site, Nd3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Nd–O bond distances ranging from 2.38–2.68 Å. In the third Nd3+ site, Nd3+ is bonded in a 7-coordinate geometry to seven O2- and one Cl1- atom. There are a spread of Nd–O bond distances ranging from 2.37–2.55 Å. The Nd–Cl bond length is 3.08 Å. In the fourth Nd3+ site, Nd3+ is bonded in a 7-coordinate geometry to seven O2- and one Cl1- atom. There are a spread of Nd–O bond distances ranging from 2.37–2.55 Å. The Nd–Cl bond length is 3.07 Å. In the fifth Nd3+ site, Nd3+ is bonded in a 10-coordinate geometry to eight O2- atoms. There are a spread of Nd–O bond distances ranging from 2.40–2.69 Å. In the sixth Nd3+ site, Nd3+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Nd–O bond distances ranging from 2.40–3.00 Å. W6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of W–O bond distances ranging from 1.78–1.88 Å. There are seven inequivalent Te4+ sites. In the first Te4+ site, Te4+ is bonded in a 3-coordinate geometry to three O2- and one Cl1- atom. There is one shorter (1.88 Å) and two longer (1.92 Å) Te–O bond length. The Te–Cl bond length is 3.27 Å. In the second Te4+ site, Te4+ is bonded in a 3-coordinate geometry to three O2- and one Cl1- atom. There is one shorter (1.88 Å) and two longer (1.92 Å) Te–O bond length. The Te–Cl bond length is 3.27 Å. In the third Te4+ site, Te4+ is bonded in a 3-coordinate geometry to three O2- and two Cl1- atoms. There are a spread of Te–O bond distances ranging from 1.89–1.98 Å. There are one shorter (3.23 Å) and one longer (3.40 Å) Te–Cl bond lengths. In the fourth Te4+ site, Te4+ is bonded in a 3-coordinate geometry to three O2- and two Cl1- atoms. There are a spread of Te–O bond distances ranging from 1.89–1.97 Å. There are one shorter (3.21 Å) and one longer (3.39 Å) Te–Cl bond lengths. In the fifth Te4+ site, Te4+ is bonded in a 3-coordinate geometry to three O2- and one Cl1- atom. There are a spread of Te–O bond distances ranging from 1.90–1.93 Å. The Te–Cl bond length is 3.42 Å. In the sixth Te4+ site, Te4+ is bonded in a distorted rectangular see-saw-like geometry to four O2- and two Cl1- atoms. There are a spread of Te–O bond distances ranging from 1.89–2.17 Å. There are one shorter (3.24 Å) and one longer (3.39 Å) Te–Cl bond lengths. In the seventh Te4+ site, Te4+ is bonded in a distorted rectangular see-saw-like geometry to four O2- and one Cl1- atom. There are a spread of Te–O bond distances ranging from 1.89–2.16 Å. The Te–Cl bond length is 3.22 Å. There are twenty-three inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to two Nd3+ and one Te4+ atom. In the second O2- site, O2- is bonded in a 3-coordinate geometry to two Nd3+ and one Te4+ atom. In the third O2- site, O2- is bonded in a 4-coordinate geometry to three Nd3+, one Te4+, and one Cl1- atom. The O–Cl bond length is 3.42 Å. In the fourth O2- site, O2- is bonded in a 4-coordinate geometry to three Nd3+, one Te4+, and one Cl1- atom. The O–Cl bond length is 3.41 Å. In the fifth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to two Nd3+, one Te4+, and one Cl1- atom. The O–Cl bond length is 3.49 Å. In the sixth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to two Nd3+ and one Te4+ atom. In the seventh O2- site, O2- is bonded in a distorted trigonal planar geometry to two Nd3+ and one W6+ atom. In the eighth O2- site, O2- is bonded in a 4-coordinate geometry to three Nd3+, one Te4+, and one Cl1- atom. The O–Cl bond length is 3.23 Å. In the ninth O2- site, O2- is bonded in a 4-coordinate geometry to three Nd3+, one Te4+, and one Cl1- atom. The O–Cl bond length is 3.23 Å. In the tenth O2- site, O2- is bonded in a single-bond geometry to one W6+ atom. In the eleventh O2- site, O2- is bonded in a 2-coordinate geometry to two Nd3+ and two Te4+ atoms. In the twelfth O2- site, O2- is bonded in a 2-coordinate geometry to one Nd3+ and two Te4+ atoms. In the thirteenth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Nd3+ and one Te4+ atom. In the fourteenth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Nd3+ and one Te4+ atom. In the fifteenth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Nd3+, one W6+, and one Cl1- atom. The O–Cl bond length is 3.02 Å. In the sixteenth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Nd3+, one W6+, and one Cl1- atom. The O–Cl bond length is 3.02 Å. In the seventeenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two Nd3+, one Te4+, and two Cl1- atoms. There are one shorter (3.49 Å) and one longer (3.50 Å) O–Cl bond lengths. In the eighteenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Nd3+, one Te4+, and two Cl1- atoms. There are one shorter (3.48 Å) and one longer (3.50 Å) O–Cl bond lengths. In the nineteenth O2- site, O2- is bonded in a 2-coordinate geometry to two Te4+ atoms. In the twentieth O2- site, O2- is bonded in a 2-coordinate geometry to two Te4+ atoms. In the twenty-first O2- site, O2- is bonded in a 3-coordinate geometry to two Nd3+ and one Te4+ atom. In the twenty-second O2- site, O2- is bonded in a 3-coordinate geometry to two Nd3+ and one Te4+ atom. In the twenty-third O2- site, O2- is bonded in a distorted trigonal planar geometry to two Nd3+, one Te4+, and one Cl1- atom. The O–Cl bond length is 3.27 Å. There are five inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a 10-coordinate geometry to two equivalent Nd3+, two equivalent Te4+, and six O2- atoms. In the second Cl1- site, Cl1- is bonded in a 10-coordinate geometry to two equivalent Nd3+, two equivalent Te4+, and six O2- atoms. In the third Cl1- site, Cl1- is bonded in a 10-coordinate geometry to five Te4+ and five O2- atoms. In the fourth Cl1- site, Cl1- is bonded in a distorted square co-planar geometry to four Te4+ atoms. In the fifth Cl1- site, Cl1- is bonded in a 2-coordinate geometry to two equivalent Te4+ and two equivalent O2- atoms.

Explore related subjects

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

2020-04-29. Materials Data on Nd5Te7WCl3O23 by Materials Project. https://doi.org/10.17188/1717368

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related reports

Cyclic moisture reactivation of calcium sorbents for long duration thermochemical energy storage

The transition to a flexible and reliable energy infrastructure, using electro-thermal energy generation technologies such as geothermal, concentrated solar power, and nuclear, usually demands simultaneous advancement of thermal energy storage (TES) to support on-demand electricity generation and industrial applications while mitigating the inherent intermittency of renewable energy sources and power outages from direct energy generation. Among TES technologies, thermochemical energy storage (TCES) based on calcium looping emerges as a compelling high-power energy storage candidate due to its high reaction enthalpy, compatibility with elevated operating temperatures, and abundance of low-cost materials. However, the long-term durability of calcium-based sorbents for TCES is hindered by surface sintering and particle aggregation, leading to performance degradation over repeated thermal cycles. This study explores a moisture hydration-based strategy to regenerate a degraded calcium sorbent and mitigate performance degradation for long duration TCES. The addition of moisture transforms calcium oxide into calcium hydroxide and produces intercalation water layers, associated with a regenerated surface area and reduced calcium oxide crystallite size. Both these effects are beneficial in restoring the sorbents' reactivity for carbonization. Additionally, an optimized hydration-assisted reactivation protocol balances the recovered energy storage capacity with heating penalty required for moisture removal from hydrated samples, resulting in an enhanced energy storage capacity up to 176% compared to benchmark sorbents that undergo cycling without reactivation after 60 cycles. In conclusion, these results highlight the potential of hydration-assisted reactivation to enhance the long-term performance of TCES, providing an effective pathway to advancing electro-thermal storage technologies.

36 MATERIALS SCIENCE↗