Search NASA⌕ Search

DOE OSTI · 1718655

Materials Data on K12Mo4S11Cl4O5 by Materials Project

Abstract

K12Mo4S11O5Cl4 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are twelve inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 7-coordinate geometry to three S2-, two O2-, and two Cl1- atoms. There are a spread of K–S bond distances ranging from 3.40–3.49 Å. There are one shorter (2.81 Å) and one longer (3.42 Å) K–O bond lengths. There are one shorter (3.18 Å) and one longer (3.21 Å) K–Cl bond lengths. In the second K1+ site, K1+ is bonded in a 7-coordinate geometry to five S2-, one O2-, and two Cl1- atoms. There are a spread of K–S bond distances ranging from 3.29–3.79 Å. The K–O bond length is 2.90 Å. There are one shorter (3.18 Å) and one longer (3.21 Å) K–Cl bond lengths. In the third K1+ site, K1+ is bonded in a 7-coordinate geometry to five S2-, one O2-, and two Cl1- atoms. There are a spread of K–S bond distances ranging from 3.32–3.79 Å. The K–O bond length is 2.87 Å. There are one shorter (3.18 Å) and one longer (3.22 Å) K–Cl bond lengths. In the fourth K1+ site, K1+ is bonded in a 6-coordinate geometry to three S2-, one O2-, and two Cl1- atoms. There are a spread of K–S bond distances ranging from 3.31–3.44 Å. The K–O bond length is 2.87 Å. There are one shorter (3.18 Å) and one longer (3.20 Å) K–Cl bond lengths. In the fifth K1+ site, K1+ is bonded in a 7-coordinate geometry to four S2-, one O2-, and two Cl1- atoms. There are a spread of K–S bond distances ranging from 3.21–3.46 Å. The K–O bond length is 2.93 Å. There are one shorter (3.22 Å) and one longer (3.24 Å) K–Cl bond lengths. In the sixth K1+ site, K1+ is bonded in a 7-coordinate geometry to four S2-, one O2-, and two Cl1- atoms. There are a spread of K–S bond distances ranging from 3.24–3.47 Å. The K–O bond length is 2.90 Å. Both K–Cl bond lengths are 3.23 Å. In the seventh K1+ site, K1+ is bonded in a 7-coordinate geometry to three S2-, two O2-, and two Cl1- atoms. There are a spread of K–S bond distances ranging from 3.40–3.51 Å. There are one shorter (2.84 Å) and one longer (3.30 Å) K–O bond lengths. Both K–Cl bond lengths are 3.22 Å. In the eighth K1+ site, K1+ is bonded in a 6-coordinate geometry to three S2-, one O2-, and two Cl1- atoms. There are a spread of K–S bond distances ranging from 3.23–3.42 Å. The K–O bond length is 2.89 Å. There are one shorter (3.21 Å) and one longer (3.22 Å) K–Cl bond lengths. In the ninth K1+ site, K1+ is bonded in a 7-coordinate geometry to four S2-, one O2-, and two equivalent Cl1- atoms. There are a spread of K–S bond distances ranging from 3.34–3.41 Å. The K–O bond length is 2.78 Å. There are one shorter (3.13 Å) and one longer (3.27 Å) K–Cl bond lengths. In the tenth K1+ site, K1+ is bonded to four S2-, one O2-, and two equivalent Cl1- atoms to form distorted KS4Cl2O pentagonal bipyramids that share corners with four KS4Cl2O pentagonal bipyramids, corners with three MoS3O tetrahedra, and an edgeedge with one MoS3O tetrahedra. There are a spread of K–S bond distances ranging from 3.32–3.42 Å. The K–O bond length is 2.79 Å. There are one shorter (3.13 Å) and one longer (3.26 Å) K–Cl bond lengths. In the eleventh K1+ site, K1+ is bonded in a 7-coordinate geometry to four S2-, one O2-, and two equivalent Cl1- atoms. There are a spread of K–S bond distances ranging from 3.34–3.41 Å. The K–O bond length is 2.78 Å. There are one shorter (3.12 Å) and one longer (3.27 Å) K–Cl bond lengths. In the twelfth K1+ site, K1+ is bonded to four S2-, one O2-, and two equivalent Cl1- atoms to form distorted KS4Cl2O pentagonal bipyramids that share corners with four KS4Cl2O pentagonal bipyramids, corners with three MoS3O tetrahedra, and an edgeedge with one MoS2O2 tetrahedra. There are a spread of K–S bond distances ranging from 3.34–3.42 Å. The K–O bond length is 2.78 Å. There are one shorter (3.13 Å) and one longer (3.27 Å) K–Cl bond lengths. There are four inequivalent Mo6+ sites. In the first Mo6+ site, Mo6+ is bonded to three S2- and one O2- atom to form MoS3O tetrahedra that share corners with two KS4Cl2O pentagonal bipyramids. There are one shorter (2.22 Å) and two longer (2.23 Å) Mo–S bond lengths. The Mo–O bond length is 1.77 Å. In the second Mo6+ site, Mo6+ is bonded to three S2- and one O2- atom to form MoS3O tetrahedra that share a cornercorner with one KS4Cl2O pentagonal bipyramid and an edgeedge with one KS4Cl2O pentagonal bipyramid. There are two shorter (2.22 Å) and one longer (2.23 Å) Mo–S bond lengths. The Mo–O bond length is 1.77 Å. In the third Mo6+ site, Mo6+ is bonded to three S2- and one O2- atom to form MoS3O tetrahedra that share corners with two KS4Cl2O pentagonal bipyramids. There are two shorter (2.22 Å) and one longer (2.23 Å) Mo–S bond lengths. The Mo–O bond length is 1.77 Å. In the fourth Mo6+ site, Mo6+ is bonded to two S2- and two O2- atoms to form MoS2O2 tetrahedra that share a cornercorner with one KS4Cl2O pentagonal bipyramid and an edgeedge with one KS4Cl2O pentagonal bipyramid. Both Mo–S bond lengths are 2.25 Å. There is one shorter (1.77 Å) and one longer (1.78 Å) Mo–O bond length. There are eleven inequivalent S2- sites. In the first S2- site, S2- is bonded in a 5-coordinate geometry to four K1+ and one Mo6+ atom. In the second S2- site, S2- is bonded in a 1-coordinate geometry to four K1+ and one Mo6+ atom. In the third S2- site, S2- is bonded in a 5-coordinate geometry to four K1+ and one Mo6+ atom. In the fourth S2- site, S2- is bonded in a 5-coordinate geometry to four K1+ and one Mo6+ atom. In the fifth S2- site, S2- is bonded in a 1-coordinate geometry to four K1+ and one Mo6+ atom. In the sixth S2- site, S2- is bonded in a 1-coordinate geometry to five K1+ and one Mo6+ atom. In the seventh S2- site, S2- is bonded in a 1-coordinate geometry to five K1+ and one Mo6+ atom. In the eighth S2- site, S2- is bonded in a 1-coordinate geometry to four K1+ and one Mo6+ atom. In the ninth S2- site, S2- is bonded in a 5-coordinate geometry to four K1+ and one Mo6+ atom. In the tenth S2- site, S2- is bonded in a 5-coordinate geometry to four K1+ and one Mo6+ atom. In the eleventh S2- site, S2- is bonded in a 5-coordinate geometry to four K1+ and one Mo6+ atom. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to three K1+ and one Mo6+ atom. In the second O2- site, O2- is bonded in a 4-coordinate geometry to three K1+ and one Mo6+ atom. In the third O2- site, O2- is bonded in a 4-coordinate geometry to three K1+ and one Mo6+ atom. In the fourth O2- site, O2- is bonded in a 4-coordinate geometry to three K1+ and one Mo6+ atom. In the fifth O2- site, O2- is bonded in a distorted single-bond geometry to two K1+ and one Mo6+ atom. There are four inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded to six K1+ atoms to form distorted corner-sharing ClK6 octahedra. The corner-sharing octahedra tilt angles range from 13–20°. In the second Cl1- site, Cl1- is bonded to six K1+ atoms to form distorted corner-sharing ClK6 octahedra. The corner-sharing octahedra tilt angles range from 13–19°. In the third Cl1- site, Cl1- is bonded to six K1+ atoms to form distorted corner-sharing ClK6 octahedra. The corner-sharing octahedra tilt angles range from 13–19°. In the fourth Cl1- site, Cl1- is bonded to six K1+ atoms to form distorted corner-sharing ClK6 octahedra. The corner-sharing octahedra tilt angles range from 13–20°.

Explore related subjects

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

2020-04-29. Materials Data on K12Mo4S11Cl4O5 by Materials Project. https://doi.org/10.17188/1718655

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↗