Search NASA⌕ Search

DOE OSTI · 1288054

Materials Data on Sr5La2Mn8(O3F)6 by Materials Project

Abstract

Sr5La2Mn8(O3F)6 is Orthorhombic Perovskite-derived structured and crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are five inequivalent Sr2+ sites. In the first Sr2+ site, Sr2+ is bonded in a 12-coordinate geometry to ten O2- and two F1- atoms. There are a spread of Sr–O bond distances ranging from 2.54–3.15 Å. There are one shorter (2.66 Å) and one longer (2.72 Å) Sr–F bond lengths. In the second Sr2+ site, Sr2+ is bonded in a 12-coordinate geometry to eight O2- and three F1- atoms. There are a spread of Sr–O bond distances ranging from 2.53–2.86 Å. There are a spread of Sr–F bond distances ranging from 2.58–2.92 Å. In the third Sr2+ site, Sr2+ is bonded in a 12-coordinate geometry to eight O2- and three F1- atoms. There are a spread of Sr–O bond distances ranging from 2.53–2.95 Å. There are a spread of Sr–F bond distances ranging from 2.60–2.99 Å. In the fourth Sr2+ site, Sr2+ is bonded in a 12-coordinate geometry to seven O2- and four F1- atoms. There are a spread of Sr–O bond distances ranging from 2.46–3.05 Å. There are a spread of Sr–F bond distances ranging from 2.64–3.04 Å. In the fifth Sr2+ site, Sr2+ is bonded in a 12-coordinate geometry to ten O2- and two F1- atoms. There are a spread of Sr–O bond distances ranging from 2.55–3.15 Å. There are one shorter (2.59 Å) and one longer (2.61 Å) Sr–F bond lengths. There are two inequivalent La3+ sites. In the first La3+ site, La3+ is bonded in a 11-coordinate geometry to eight O2- and three F1- atoms. There are a spread of La–O bond distances ranging from 2.46–2.89 Å. There are a spread of La–F bond distances ranging from 2.58–2.99 Å. In the second La3+ site, La3+ is bonded in a 11-coordinate geometry to six O2- and two F1- atoms. There are a spread of La–O bond distances ranging from 2.47–2.79 Å. There are one shorter (2.56 Å) and one longer (2.79 Å) La–F bond lengths. There are eight inequivalent Mn+3.25+ sites. In the first Mn+3.25+ site, Mn+3.25+ is bonded to four O2- and two F1- atoms to form corner-sharing MnO4F2 octahedra. The corner-sharing octahedra tilt angles range from 9–24°. There are a spread of Mn–O bond distances ranging from 1.87–2.06 Å. There are one shorter (2.00 Å) and one longer (2.05 Å) Mn–F bond lengths. In the second Mn+3.25+ site, Mn+3.25+ is bonded to four O2- and two F1- atoms to form corner-sharing MnO4F2 octahedra. The corner-sharing octahedra tilt angles range from 5–23°. There are a spread of Mn–O bond distances ranging from 1.87–2.05 Å. There are one shorter (2.01 Å) and one longer (2.05 Å) Mn–F bond lengths. In the third Mn+3.25+ site, Mn+3.25+ is bonded to five O2- and one F1- atom to form corner-sharing MnO5F octahedra. The corner-sharing octahedra tilt angles range from 12–19°. There are a spread of Mn–O bond distances ranging from 1.92–2.02 Å. The Mn–F bond length is 2.10 Å. In the fourth Mn+3.25+ site, Mn+3.25+ is bonded to four O2- and two F1- atoms to form corner-sharing MnO4F2 octahedra. The corner-sharing octahedra tilt angles range from 9–24°. There are a spread of Mn–O bond distances ranging from 1.87–2.07 Å. There are one shorter (2.01 Å) and one longer (2.04 Å) Mn–F bond lengths. In the fifth Mn+3.25+ site, Mn+3.25+ is bonded to five O2- and one F1- atom to form corner-sharing MnO5F octahedra. The corner-sharing octahedra tilt angles range from 9–19°. There are a spread of Mn–O bond distances ranging from 1.92–2.03 Å. The Mn–F bond length is 2.11 Å. In the sixth Mn+3.25+ site, Mn+3.25+ is bonded to four O2- and two F1- atoms to form corner-sharing MnO4F2 octahedra. The corner-sharing octahedra tilt angles range from 5–24°. There are a spread of Mn–O bond distances ranging from 1.87–2.06 Å. There are one shorter (2.00 Å) and one longer (2.04 Å) Mn–F bond lengths. In the seventh Mn+3.25+ site, Mn+3.25+ is bonded to five O2- and one F1- atom to form corner-sharing MnO5F octahedra. The corner-sharing octahedra tilt angles range from 9–24°. There are a spread of Mn–O bond distances ranging from 1.93–2.03 Å. The Mn–F bond length is 2.11 Å. In the eighth Mn+3.25+ site, Mn+3.25+ is bonded to five O2- and one F1- atom to form corner-sharing MnO5F octahedra. The corner-sharing octahedra tilt angles range from 12–23°. There are a spread of Mn–O bond distances ranging from 1.93–2.04 Å. The Mn–F bond length is 2.11 Å. There are eighteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Sr2+, one La3+, and two Mn+3.25+ atoms. In the second O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Sr2+, one La3+, and two Mn+3.25+ atoms. In the third O2- site, O2- is bonded in a 2-coordinate geometry to three Sr2+, one La3+, and two Mn+3.25+ atoms. In the fourth O2- site, O2- is bonded in a 4-coordinate geometry to two Sr2+, one La3+, and two Mn+3.25+ atoms. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to three Sr2+, one La3+, and two Mn+3.25+ atoms. In the sixth O2- site, O2- is bonded in a 2-coordinate geometry to two Sr2+ and two Mn+3.25+ atoms. In the seventh O2- site, O2- is bonded in a 2-coordinate geometry to three Sr2+, one La3+, and two Mn+3.25+ atoms. In the eighth O2- site, O2- is bonded in a 3-coordinate geometry to one Sr2+ and two Mn+3.25+ atoms. In the ninth O2- site, O2- is bonded in a 2-coordinate geometry to four Sr2+ and two Mn+3.25+ atoms. In the tenth O2- site, O2- is bonded in a 4-coordinate geometry to one Sr2+, one La3+, and two Mn+3.25+ atoms. In the eleventh O2- site, O2- is bonded in a 2-coordinate geometry to one Sr2+, two equivalent La3+, and two Mn+3.25+ atoms. In the twelfth O2- site, O2- is bonded in a 2-coordinate geometry to three Sr2+, one La3+, and two Mn+3.25+ atoms. In the thirteenth O2- site, O2- is bonded in a 2-coordinate geometry to two Sr2+, one La3+, and two Mn+3.25+ atoms. In the fourteenth O2- site, O2- is bonded in a 2-coordinate geometry to three Sr2+, one La3+, and two Mn+3.25+ atoms. In the fifteenth O2- site, O2- is bonded in a 2-coordinate geometry to two Sr2+, one La3+, and two Mn+3.25+ atoms. In the sixteenth O2- site, O2- is bonded in a 2-coordinate geometry to three Sr2+, one La3+, and two Mn+3.25+ atoms. In the seventeenth O2- site, O2- is bonded in a 2-coordinate geometry to four Sr2+ and two Mn+3.25+ atoms. In the eighteenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two equivalent Sr2+ and two Mn+3.25+ atoms. There are six inequivalent F1- sites. In the first F1- site, F1- is bonded in a 2-coordinate geometry to two Sr2+, one La3+, and two Mn+3.25+ atoms. In the second F1- site, F1- is bonded in a 5-coordinate geometry to three Sr2+ and two Mn+3.25+ atoms. In the third F1- site, F1- is bonded in a 2-coordinate geometry to two Sr2+, one La3+, and two Mn+3.25+ atoms. In the fourth F1- site, F1- is bonded in a 2-coordinate geometry to two Sr2+, one La3+, and two Mn+3.25+ atoms. In the fifth F1- site, F1- is bonded in a 2-coordinate geometry to three Sr2+, one La3+, and two Mn+3.25+ atoms. In the sixth F1- site, F1- is bonded in a 2-coordinate geometry to two Sr2+, one La3+, and two Mn+3.25+ atoms.

Explore related subjects

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

2020-08-03. Materials Data on Sr5La2Mn8(O3F)6 by Materials Project. https://doi.org/10.17188/1288054

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↗