Search NASA⌕ Search

DOE OSTI · 1263252

Materials Data on GdZr3F15 by Materials Project

Abstract

GdZr3F15 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are two inequivalent Gd3+ sites. In the first Gd3+ site, Gd3+ is bonded in a 8-coordinate geometry to eight F1- atoms. There are a spread of Gd–F bond distances ranging from 2.29–2.38 Å. In the second Gd3+ site, Gd3+ is bonded in a 8-coordinate geometry to eight F1- atoms. There are a spread of Gd–F bond distances ranging from 2.29–2.35 Å. There are six inequivalent Zr4+ sites. In the first Zr4+ site, Zr4+ is bonded in a 8-coordinate geometry to eight F1- atoms. There are a spread of Zr–F bond distances ranging from 2.06–2.37 Å. In the second Zr4+ site, Zr4+ is bonded in a 8-coordinate geometry to eight F1- atoms. There are a spread of Zr–F bond distances ranging from 2.05–2.32 Å. In the third Zr4+ site, Zr4+ is bonded in an octahedral geometry to six F1- atoms. There are a spread of Zr–F bond distances ranging from 2.02–2.07 Å. In the fourth Zr4+ site, Zr4+ is bonded in a 8-coordinate geometry to eight F1- atoms. There are a spread of Zr–F bond distances ranging from 2.04–2.32 Å. In the fifth Zr4+ site, Zr4+ is bonded in a 8-coordinate geometry to eight F1- atoms. There are a spread of Zr–F bond distances ranging from 2.06–2.31 Å. In the sixth Zr4+ site, Zr4+ is bonded in an octahedral geometry to six F1- atoms. There are a spread of Zr–F bond distances ranging from 2.02–2.06 Å. There are thirty inequivalent F1- sites. In the first F1- site, F1- is bonded in a bent 150 degrees geometry to two Zr4+ atoms. In the second F1- site, F1- is bonded in a linear geometry to two Zr4+ atoms. In the third F1- site, F1- is bonded in a bent 150 degrees geometry to one Gd3+ and one Zr4+ atom. In the fourth F1- site, F1- is bonded in a bent 150 degrees geometry to one Gd3+ and one Zr4+ atom. In the fifth F1- site, F1- is bonded in a bent 150 degrees geometry to two Zr4+ atoms. In the sixth F1- site, F1- is bonded in a linear geometry to one Gd3+ and one Zr4+ atom. In the seventh F1- site, F1- is bonded in a linear geometry to one Gd3+ and one Zr4+ atom. In the eighth F1- site, F1- is bonded in a bent 150 degrees geometry to one Gd3+ and one Zr4+ atom. In the ninth F1- site, F1- is bonded in a distorted bent 150 degrees geometry to one Gd3+ and one Zr4+ atom. In the tenth F1- site, F1- is bonded in a distorted bent 150 degrees geometry to two Zr4+ atoms. In the eleventh F1- site, F1- is bonded in a bent 150 degrees geometry to one Gd3+ and one Zr4+ atom. In the twelfth F1- site, F1- is bonded in a bent 150 degrees geometry to two Zr4+ atoms. In the thirteenth F1- site, F1- is bonded in a bent 150 degrees geometry to one Gd3+ and one Zr4+ atom. In the fourteenth F1- site, F1- is bonded in a distorted bent 150 degrees geometry to one Gd3+ and one Zr4+ atom. In the fifteenth F1- site, F1- is bonded in a distorted bent 150 degrees geometry to two Zr4+ atoms. In the sixteenth F1- site, F1- is bonded in a bent 150 degrees geometry to one Gd3+ and one Zr4+ atom. In the seventeenth F1- site, F1- is bonded in a linear geometry to two Zr4+ atoms. In the eighteenth F1- site, F1- is bonded in a bent 150 degrees geometry to one Gd3+ and one Zr4+ atom. In the nineteenth F1- site, F1- is bonded in a distorted bent 150 degrees geometry to two Zr4+ atoms. In the twentieth F1- site, F1- is bonded in a distorted bent 150 degrees geometry to two Zr4+ atoms. In the twenty-first F1- site, F1- is bonded in a bent 150 degrees geometry to two Zr4+ atoms. In the twenty-second F1- site, F1- is bonded in a distorted bent 150 degrees geometry to two Zr4+ atoms. In the twenty-third F1- site, F1- is bonded in a bent 150 degrees geometry to two Zr4+ atoms. In the twenty-fourth F1- site, F1- is bonded in a bent 150 degrees geometry to one Gd3+ and one Zr4+ atom. In the twenty-fifth F1- site, F1- is bonded in a bent 150 degrees geometry to two Zr4+ atoms. In the twenty-sixth F1- site, F1- is bonded in a distorted bent 150 degrees geometry to two Zr4+ atoms. In the twenty-seventh F1- site, F1- is bonded in a linear geometry to one Gd3+ and one Zr4+ atom. In the twenty-eighth F1- site, F1- is bonded in a linear geometry to one Gd3+ and one Zr4+ atom. In the twenty-ninth F1- site, F1- is bonded in a bent 150 degrees geometry to one Gd3+ and one Zr4+ atom. In the thirtieth F1- site, F1- is bonded in a bent 150 degrees geometry to one Gd3+ and one Zr4+ atom.

Explore related subjects

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

2020-04-30. Materials Data on GdZr3F15 by Materials Project. https://doi.org/10.17188/1263252

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↗