Search NASA⌕ Search

DOE OSTI · 1683391

Materials Data on La3ZnCuRh2PbO12 by Materials Project

Abstract

La3Rh2CuZnPbO12 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are three inequivalent La3+ sites. In the first La3+ site, La3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of La–O bond distances ranging from 2.41–2.77 Å. In the second La3+ site, La3+ is bonded in a 4-coordinate geometry to eight O2- atoms. There are a spread of La–O bond distances ranging from 2.39–2.82 Å. In the third La3+ site, La3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of La–O bond distances ranging from 2.39–2.75 Å. There are two inequivalent Rh4+ sites. In the first Rh4+ site, Rh4+ is bonded to six O2- atoms to form RhO6 octahedra that share corners with two equivalent CuO6 octahedra and corners with four equivalent ZnO6 octahedra. The corner-sharing octahedra tilt angles range from 31–34°. There are a spread of Rh–O bond distances ranging from 2.02–2.06 Å. In the second Rh4+ site, Rh4+ is bonded to six O2- atoms to form RhO6 octahedra that share corners with two equivalent ZnO6 octahedra and corners with four equivalent CuO6 octahedra. The corner-sharing octahedra tilt angles range from 28–32°. There are a spread of Rh–O bond distances ranging from 2.00–2.06 Å. Cu1+ is bonded to six O2- atoms to form CuO6 octahedra that share corners with six RhO6 octahedra. The corner-sharing octahedra tilt angles range from 28–34°. There are a spread of Cu–O bond distances ranging from 2.07–2.16 Å. Zn2+ is bonded to six O2- atoms to form ZnO6 octahedra that share corners with six RhO6 octahedra. The corner-sharing octahedra tilt angles range from 30–33°. There are a spread of Zn–O bond distances ranging from 2.08–2.19 Å. Pb4+ is bonded in a 4-coordinate geometry to eight O2- atoms. There are a spread of Pb–O bond distances ranging from 2.31–2.84 Å. There are twelve inequivalent O2- sites. In the first O2- site, O2- is bonded to one La3+, one Rh4+, one Zn2+, and one Pb4+ atom to form distorted corner-sharing OLaZnRhPb tetrahedra. In the second O2- site, O2- is bonded to one La3+, one Rh4+, one Cu1+, and one Pb4+ atom to form distorted corner-sharing OLaCuRhPb tetrahedra. In the third O2- site, O2- is bonded to two La3+, one Rh4+, and one Zn2+ atom to form distorted corner-sharing OLa2ZnRh tetrahedra. In the fourth O2- site, O2- is bonded to two La3+, one Rh4+, and one Cu1+ atom to form distorted corner-sharing OLa2CuRh tetrahedra. In the fifth O2- site, O2- is bonded in a 5-coordinate geometry to two La3+, one Rh4+, one Cu1+, and one Pb4+ atom. In the sixth O2- site, O2- is bonded in a 5-coordinate geometry to two La3+, one Rh4+, one Zn2+, and one Pb4+ atom. In the seventh O2- site, O2- is bonded in a 5-coordinate geometry to two La3+, one Rh4+, one Zn2+, and one Pb4+ atom. In the eighth O2- site, O2- is bonded in a 5-coordinate geometry to three La3+, one Rh4+, and one Cu1+ atom. In the ninth O2- site, O2- is bonded in a 4-coordinate geometry to two La3+, one Rh4+, one Cu1+, and one Pb4+ atom. In the tenth O2- site, O2- is bonded in a 5-coordinate geometry to three La3+, one Rh4+, and one Zn2+ atom. In the eleventh O2- site, O2- is bonded in a 5-coordinate geometry to two La3+, one Rh4+, one Zn2+, and one Pb4+ atom. In the twelfth O2- site, O2- is bonded in a 5-coordinate geometry to two La3+, one Rh4+, one Cu1+, and one Pb4+ atom.

Explore related subjects

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

2020-04-30. Materials Data on La3ZnCuRh2PbO12 by Materials Project. https://doi.org/10.17188/1683391

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↗