Search NASA⌕ Search

DOE OSTI · 1741525

Materials Data on ZrMnNi by Materials Project

Abstract

ZrMnNi1.0 crystallizes in the orthorhombic Amm2 space group. The structure is three-dimensional. there are five inequivalent Zr sites. In the first Zr site, Zr is bonded in a 12-coordinate geometry to four Zr, seven Mn, and five Ni atoms. There are a spread of Zr–Zr bond distances ranging from 3.02–3.04 Å. There are a spread of Zr–Mn bond distances ranging from 2.88–2.96 Å. There are a spread of Zr–Ni bond distances ranging from 2.87–2.92 Å. In the second Zr site, Zr is bonded in a 12-coordinate geometry to four Zr, five Mn, and seven Ni atoms. The Zr–Zr bond length is 3.05 Å. There are a spread of Zr–Mn bond distances ranging from 2.86–3.02 Å. There are a spread of Zr–Ni bond distances ranging from 2.87–2.95 Å. In the third Zr site, Zr is bonded in a 12-coordinate geometry to four Zr, five Mn, and seven Ni atoms. There are two shorter (3.02 Å) and one longer (3.04 Å) Zr–Zr bond lengths. There are a spread of Zr–Mn bond distances ranging from 2.86–3.02 Å. There are a spread of Zr–Ni bond distances ranging from 2.87–2.95 Å. In the fourth Zr site, Zr is bonded in a 12-coordinate geometry to four Zr, seven Mn, and five Ni atoms. There are a spread of Zr–Mn bond distances ranging from 2.88–2.96 Å. There are a spread of Zr–Ni bond distances ranging from 2.87–2.92 Å. In the fifth Zr site, Zr is bonded in a 12-coordinate geometry to four Zr, seven Mn, and five Ni atoms. The Zr–Zr bond length is 3.03 Å. There are a spread of Zr–Mn bond distances ranging from 2.88–2.96 Å. There are a spread of Zr–Ni bond distances ranging from 2.87–2.92 Å. There are two inequivalent Mn sites. In the first Mn site, Mn is bonded to six Zr, two equivalent Mn, and four Ni atoms to form distorted MnZr6Mn2Ni4 cuboctahedra that share corners with four equivalent MnZr6Mn4Ni2 cuboctahedra, corners with eight NiZr6Mn6 cuboctahedra, edges with six equivalent MnZr6Mn2Ni4 cuboctahedra, faces with eight MnZr6Mn2Ni4 cuboctahedra, and faces with twelve NiZr6Mn6 cuboctahedra. Both Mn–Mn bond lengths are 2.42 Å. There are a spread of Mn–Ni bond distances ranging from 2.49–2.51 Å. In the second Mn site, Mn is bonded to six Zr, four Mn, and two equivalent Ni atoms to form distorted MnZr6Mn4Ni2 cuboctahedra that share corners with eight MnZr6Mn2Ni4 cuboctahedra, corners with ten NiZr6Mn2Ni4 cuboctahedra, edges with two equivalent MnZr6Mn4Ni2 cuboctahedra, edges with four equivalent NiZr6Mn2Ni4 cuboctahedra, faces with eight NiZr6Mn6 cuboctahedra, and faces with ten MnZr6Mn2Ni4 cuboctahedra. There are one shorter (2.41 Å) and one longer (2.46 Å) Mn–Mn bond lengths. There are one shorter (2.48 Å) and one longer (2.52 Å) Mn–Ni bond lengths. There are three inequivalent Ni sites. In the first Ni site, Ni is bonded to six Zr and six Mn atoms to form NiZr6Mn6 cuboctahedra that share corners with four equivalent MnZr6Mn2Ni4 cuboctahedra, corners with fourteen NiZr6Mn6 cuboctahedra, edges with six NiZr6Mn6 cuboctahedra, faces with four equivalent NiZr6Mn2Ni4 cuboctahedra, and faces with fourteen MnZr6Mn2Ni4 cuboctahedra. In the second Ni site, Ni is bonded to six Zr, two equivalent Mn, and four Ni atoms to form distorted NiZr6Mn2Ni4 cuboctahedra that share corners with eight NiZr6Mn6 cuboctahedra, corners with ten MnZr6Mn2Ni4 cuboctahedra, edges with two equivalent NiZr6Mn2Ni4 cuboctahedra, edges with four equivalent MnZr6Mn4Ni2 cuboctahedra, faces with eight MnZr6Mn2Ni4 cuboctahedra, and faces with ten NiZr6Mn6 cuboctahedra. There are a spread of Ni–Ni bond distances ranging from 2.43–2.52 Å. In the third Ni site, Ni is bonded to six Zr, two equivalent Mn, and four equivalent Ni atoms to form distorted NiZr6Mn2Ni4 cuboctahedra that share corners with six NiZr6Mn6 cuboctahedra, corners with twelve MnZr6Mn2Ni4 cuboctahedra, edges with six NiZr6Mn6 cuboctahedra, faces with eight equivalent NiZr6Mn2Ni4 cuboctahedra, and faces with ten MnZr6Mn2Ni4 cuboctahedra.

Explore related subjects

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

2020-06-05. Materials Data on ZrMnNi by Materials Project. https://doi.org/10.17188/1741525

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↗