Search NASA⌕ Search

DOE OSTI · 1752813

Materials Data on Na4Ca7MnSi12(HO9)4 by Materials Project

Abstract

Na4Ca7MnSi12(HO9)4 is Esseneite-derived structured and crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are four inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded in a 8-coordinate geometry to one H1+ and seven O2- atoms. The Na–H bond length is 2.32 Å. There are a spread of Na–O bond distances ranging from 2.33–2.92 Å. In the second Na1+ site, Na1+ is bonded in a 4-coordinate geometry to one H1+ and eight O2- atoms. The Na–H bond length is 2.32 Å. There are a spread of Na–O bond distances ranging from 2.30–3.08 Å. In the third Na1+ site, Na1+ is bonded in a 4-coordinate geometry to one H1+ and eight O2- atoms. The Na–H bond length is 2.32 Å. There are a spread of Na–O bond distances ranging from 2.32–3.08 Å. In the fourth Na1+ site, Na1+ is bonded in a 4-coordinate geometry to one H1+ and eight O2- atoms. The Na–H bond length is 2.32 Å. There are a spread of Na–O bond distances ranging from 2.31–3.09 Å. There are seven inequivalent Ca2+ sites. In the first Ca2+ site, Ca2+ is bonded to six O2- atoms to form CaO6 octahedra that share corners with six SiO4 tetrahedra, an edgeedge with one MnO6 octahedra, and edges with three CaO6 octahedra. There are a spread of Ca–O bond distances ranging from 2.35–2.46 Å. In the second Ca2+ site, Ca2+ is bonded to six O2- atoms to form CaO6 octahedra that share corners with six SiO4 tetrahedra, an edgeedge with one MnO6 octahedra, and edges with three CaO6 octahedra. There are a spread of Ca–O bond distances ranging from 2.34–2.48 Å. In the third Ca2+ site, Ca2+ is bonded to six O2- atoms to form CaO6 octahedra that share corners with six SiO4 tetrahedra and edges with four CaO6 octahedra. There are a spread of Ca–O bond distances ranging from 2.34–2.46 Å. In the fourth Ca2+ site, Ca2+ is bonded to six O2- atoms to form CaO6 octahedra that share corners with six SiO4 tetrahedra, an edgeedge with one MnO6 octahedra, and edges with three CaO6 octahedra. There are a spread of Ca–O bond distances ranging from 2.33–2.45 Å. In the fifth Ca2+ site, Ca2+ is bonded to six O2- atoms to form CaO6 octahedra that share corners with six SiO4 tetrahedra and edges with four CaO6 octahedra. There are a spread of Ca–O bond distances ranging from 2.32–2.46 Å. In the sixth Ca2+ site, Ca2+ is bonded to six O2- atoms to form CaO6 octahedra that share corners with six SiO4 tetrahedra, an edgeedge with one MnO6 octahedra, and edges with three CaO6 octahedra. There are a spread of Ca–O bond distances ranging from 2.32–2.45 Å. In the seventh Ca2+ site, Ca2+ is bonded to six O2- atoms to form CaO6 octahedra that share corners with six SiO4 tetrahedra and edges with four CaO6 octahedra. There are a spread of Ca–O bond distances ranging from 2.32–2.45 Å. Mn2+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with six SiO4 tetrahedra and edges with four CaO6 octahedra. There are a spread of Mn–O bond distances ranging from 2.21–2.44 Å. There are twelve inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with four CaO6 octahedra and corners with two SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 49–59°. There are a spread of Si–O bond distances ranging from 1.61–1.69 Å. In the second Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MnO6 octahedra, corners with three CaO6 octahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 46–59°. There are a spread of Si–O bond distances ranging from 1.62–1.70 Å. In the third Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MnO6 octahedra, corners with three CaO6 octahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 48–62°. There are a spread of Si–O bond distances ranging from 1.61–1.69 Å. In the fourth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with four CaO6 octahedra and corners with two SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 48–59°. There are a spread of Si–O bond distances ranging from 1.61–1.69 Å. In the fifth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with four CaO6 octahedra and corners with two SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 41–66°. There are a spread of Si–O bond distances ranging from 1.61–1.66 Å. In the sixth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MnO6 octahedra, corners with three CaO6 octahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 41–67°. There are a spread of Si–O bond distances ranging from 1.62–1.67 Å. In the seventh Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with four CaO6 octahedra and corners with two SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 40–66°. There are a spread of Si–O bond distances ranging from 1.61–1.66 Å. In the eighth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with four CaO6 octahedra and corners with two SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 41–66°. There are a spread of Si–O bond distances ranging from 1.61–1.66 Å. In the ninth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MnO6 octahedra, corners with three CaO6 octahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 40–67°. There are a spread of Si–O bond distances ranging from 1.62–1.68 Å. In the tenth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with four CaO6 octahedra and corners with two SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 40–66°. There are a spread of Si–O bond distances ranging from 1.62–1.68 Å. In the eleventh Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with two CaO6 octahedra, corners with two equivalent MnO6 octahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 38–64°. There are a spread of Si–O bond distances ranging from 1.63–1.68 Å. In the twelfth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with four CaO6 octahedra and corners with two SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 40–66°. There are a spread of Si–O bond distances ranging from 1.62–1.68 Å. There are four inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a distorted linear geometry to one Na1+ and two O2- atoms. There is one shorter (1.07 Å) and one longer (1.42 Å) H–O bond length. In the second H1+ site, H1+ is bonded in a distorted linear geometry to one Na1+ and two O2- atoms. There is one shorter (1.07 Å) and one longer (1.42 Å) H–O bond length. In the third H1+ site, H1+ is bonded in a distorted linear geometry to one Na1+ and two O2- atoms. There is one shorter (1.07 Å) and one longer (1.45 Å) H–O bond length. In the fourth H1+ site, H1+ is bonded in a distorted linear geometry to one Na1+ and two O2- atoms. There is one shorter (1.07 Å) and one longer (1.42 Å) H–O bond length. There are thirty-six inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to three Ca2+ and one Si4+ atom. In the second O2- site, O2- is bonded in a 4-coordinate geometry to two Ca2+, one Mn2+, and one Si4+ atom. In the third O2- site, O2- is bonded in a 4-coordinate geometry to three Ca2+ and one Si4+ atom. In the fourth O2- site, O2- is bonded in a 4-coordinate geometry to three Ca2+ and one Si4+ atom. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to two Na1+ and two Si4+ atoms. In the sixth O2- site, O2- is bonded in a 2-coordinate geometry to two Na1+ and two Si4+ atoms. In the seventh O2- site, O2- is bonded in a 2-coordinate geometry to one Na1+ and two Si4+ atoms. In the eighth O2- site, O2- is bonded in a 2-coordinate geometry to two Na1+ and two Si4+ atoms. In the ninth O2- site, O2- is bonded in a 2-coordinate geometry to one Na1+, one Ca2+, one Si4+, and one H1+ atom. In the tenth O2- site, O2- is bonded in a 2-coordinate geometry to one Na1+, one Ca2+, one Si4+, and one H1+ atom. In the eleventh O2- site, O2- is bonded in a 2-coordinate geometry to one Na1+, one Ca2+, one Si4+, and one H1+ atom. In the twelfth O2- site, O2- is bonded in a 2-coordinate geometry to one Na1+, one Ca2+, one Si4+, and one H1+ atom. In the thirteenth O2- site, O2- is bonded in a distorted T-shaped geometry to one Na1+ and two Si4+ atoms. In the fourteenth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+ and two Si4+ atoms. In the fifteenth O2- site, O2- is bonded in a distorted T-shaped geometry to one Na1+ and two Si4+ atoms. In the sixteenth O2- site, O2- is bonded in a distorted T-shaped geometry to one Na1+ and two Si4+ atoms. In the seventeenth O2- site, O2- is bonded in a 2-coordinate geometry to one Na1+, one Ca2+, one Si4+, and one H1+ atom. In the eighteenth O2- site, O2- is bonded in a 2-coordinate geometry to one Na1+, one Ca2+, one Si4+, and one H1+ atom. In the nineteenth O2- site, O2- is bonded in a 2-coordinate geometry to one Na1+, one Mn2+, one Si4+, and one H1+ atom. In the twentieth O2- site, O2- is bonded in a 2-coordinate geometry to one Na1+, one Ca2+, one Si4+, and one H1+ atom. In the twenty-first O2- site, O2- is bonded to two Ca2+, one Mn2+, and one Si4+ atom to form distorted corner-sharing OCa2MnSi tetrahedra. In the twenty-second O2- site, O2- is bonded to three Ca2+ and one Si4+ atom to form distorted OCa3Si tetrahedra that share corners with two ONaCaMnSi trigonal pyramids and an edgeedge with one OCa3Si tetrahedra. In the twenty-third O2- site, O2- is bonded in a 4-coordinate geometry to two Ca2+, one Mn2+, and one Si4+ atom. In the twenty-fourth O2- site, O2- is bonded to three Ca2+ and one Si4+ atom to form distorted OCa3Si tetrahedra that share corners with two ONaCa2Si trigonal pyramids and an edgeedge with one OCa3Si tetrahedra. In the twenty-fifth O2- site, O2- is bonded to one Na1+, one Ca2+, one Mn2+, and one Si4+ atom to form distorted corner-sharing ONaCaMnSi trigonal pyramids. In the twenty-sixth O2- site, O2- is bonded to one Na1+, two Ca2+, and one Si4+ atom to form distorted corner-sharing ONaCa2Si trigonal pyramids. In the twenty-seventh O2- site, O2- is bonded to one Na1+, two Ca2+, and one Si4+ atom to form distorted corner-sharing ONaCa2Si trigonal pyramids. In the twenty-eighth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Na1+, two Ca2+, and one Si4+ atom. In the twenty-ninth O2- site, O2- is bonded in a 2-coordinate geometry to two Na1+ and two Si4+ atoms. In the thirtieth O2- site, O2- is bonded in a 2-coordinate geometry to two Na1+ and two Si4+ atoms. In the thirty-first O2- site, O2- is bonded in a 4-coordinate geometry to two Na1+ and two Si4+ atoms. In the thirty-second O2- site, O2- is bonded in a 2-coordinate geometry to two Na1+ and two Si4+ atoms. In the thirty-third O2- site, O2- is bonded in a 3-coordinate geometry to two Ca2+ and one Si4+ atom. In the thirty-fourth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Ca2+, one Mn2+, and one Si4+ atom. In the thirty-fifth O2- site, O2- is bonded in a 3-coordinate geometry to two Ca2+ and one Si4+ atom. In the thirty-sixth O2- site, O2- is bonded in a 3-coordinate geometry to two Ca2+ and one Si4+ atom.

Explore related subjects

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

2020-04-29. Materials Data on Na4Ca7MnSi12(HO9)4 by Materials Project. https://doi.org/10.17188/1752813

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↗