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DOE OSTI2020

Materials Data on Ho11Te16ClO48 by Materials Project

Ho11Te16O48Cl crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are six inequivalent Ho3+ sites. In the first Ho3+ site, Ho3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Ho–O bond distances ranging from 2.23–2.54 Å. In the second Ho3+ site, Ho3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Ho–O bond distances ranging from 2.22–2.75 Å. In the third Ho3+ site, Ho3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ho–O bond distances ranging from 2.25–2.57 Å. In the fourth Ho3+ site, Ho3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ho–O bond distances ranging from 2.25–2.54 Å. In the fifth Ho3+ site, Ho3+ is bonded in an octahedral geometry to six O2- atoms. There are a spread of Ho–O bond distances ranging from 2.22–2.37 Å. In the sixth Ho3+ site, Ho3+ is bonded in a distorted pentagonal bipyramidal geometry to seven O2- atoms. There are a spread of Ho–O bond distances ranging from 2.24–2.45 Å. There are eight inequivalent Te4+ sites. In the first Te4+ site, Te4+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of Te–O bond distances ranging from 1.90–1.97 Å. In the second Te4+ site, Te4+ is bonded in a distorted T-shaped geometry to three O2- atoms. There are a spread of Te–O bond distances ranging from 1.88–1.95 Å. In the third Te4+ site, Te4+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of Te–O bond distances ranging from 1.89–2.62 Å. In the fourth Te4+ site, Te4+ is bonded in a 5-coordinate geometry to four O2- and one Cl1- atom. There are a spread of Te–O bond distances ranging from 1.92–2.37 Å. The Te–Cl bond length is 2.89 Å. In the fifth Te4+ site, Te4+ is bonded in a 3-coordinate geometry to three O2- atoms. All Te–O bond lengths are 1.91 Å. In the sixth Te4+ site, Te4+ is bonded in a 3-coordinate geometry to three O2- atoms. There is two shorter (1.91 Å) and one longer (1.93 Å) Te–O bond length. In the seventh Te4+ site, Te4+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of Te–O bond distances ranging from 1.90–1.93 Å. In the eighth Te4+ site, Te4+ is bonded in a see-saw-like geometry to four O2- atoms. There are a spread of Te–O bond distances ranging from 1.89–2.18 Å. There are twenty-four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to one Ho3+ and two Te4+ atoms. In the second O2- site, O2- is bonded in a bent 150 degrees geometry to one Ho3+ and one Te4+ atom. In the third O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to two Ho3+ and one Te4+ atom. In the fourth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to two Ho3+ and one Te4+ atom. In the fifth O2- site, O2- is bonded in a trigonal planar geometry to two Ho3+ and one Te4+ atom. In the sixth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to two Ho3+ and one Te4+ atom. In the seventh O2- site, O2- is bonded in a trigonal planar geometry to two Ho3+ and one Te4+ atom. In the eighth O2- site, O2- is bonded in a 4-coordinate geometry to two Ho3+ and two Te4+ atoms. In the ninth O2- site, O2- is bonded in a 3-coordinate geometry to two Ho3+ and one Te4+ atom. In the tenth O2- site, O2- is bonded in a 2-coordinate geometry to two Ho3+ and one Te4+ atom. In the eleventh O2- site, O2- is bonded in a 1-coordinate geometry to two Ho3+ and one Te4+ atom. In the twelfth O2- site, O2- is bonded in a distorted water-like geometry to two Te4+ atoms. In the thirteenth O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Ho3+ and one Te4+ atom. In the fourteenth O2- site, O2- is bonded in a 3-coordinate geometry to two Ho3+ and one Te4+ atom. In the fifteenth O2- site, O2- is bonded in a bent 150 degrees geometry to one Ho3+ and one Te4+ atom. In the sixteenth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to two Ho3+ and one Te4+ atom. In the seventeenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Ho3+ and one Te4+ atom. In the eighteenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Ho3+ and one Te4+ atom. In the nineteenth O2- site, O2- is bonded in a 3-coordinate geometry to two Ho3+ and one Te4+ atom. In the twentieth O2- site, O2- is bonded in a 3-coordinate geometry to two Ho3+ and one Te4+ atom. In the twenty-first O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Ho3+ and one Te4+ atom. In the twenty-second O2- site, O2- is bonded in a 3-coordinate geometry to two Ho3+ and one Te4+ atom. In the twenty-third O2- site, O2- is bonded in a 2-coordinate geometry to one Ho3+ and one Te4+ atom. In the twenty-fourth O2- site, O2- is bonded in a 3-coordinate geometry to two Ho3+ and one Te4+ atom. Cl1- is bonded in a linear geometry to two equivalent Te4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ho2(SO4)3 by Materials Project

Ho2(SO4)3 crystallizes in the orthorhombic Pbcn space group. The structure is three-dimensional. Ho3+ is bonded to six O2- atoms to form HoO6 octahedra that share corners with six SO4 tetrahedra. There are a spread of Ho–O bond distances ranging from 2.22–2.25 Å. There are two inequivalent S6+ sites. In the first S6+ site, S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share corners with four equivalent HoO6 octahedra. The corner-sharing octahedra tilt angles range from 15–26°. All S–O bond lengths are 1.48 Å. In the second S6+ site, S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share corners with four equivalent HoO6 octahedra. The corner-sharing octahedra tilt angles range from 3–35°. All S–O bond lengths are 1.48 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a linear geometry to one Ho3+ and one S6+ atom. In the second O2- site, O2- is bonded in a distorted linear geometry to one Ho3+ and one S6+ atom. In the third O2- site, O2- is bonded in a bent 150 degrees geometry to one Ho3+ and one S6+ atom. In the fourth O2- site, O2- is bonded in a bent 150 degrees geometry to one Ho3+ and one S6+ atom. In the fifth O2- site, O2- is bonded in a bent 150 degrees geometry to one Ho3+ and one S6+ atom. In the sixth O2- site, O2- is bonded in a bent 150 degrees geometry to one Ho3+ and one S6+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ho2(SeO3)3 by Materials Project

Ho2(SeO3)3 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are two inequivalent Ho3+ sites. In the first Ho3+ site, Ho3+ is bonded in a pentagonal bipyramidal geometry to seven O2- atoms. There are a spread of Ho–O bond distances ranging from 2.21–2.46 Å. In the second Ho3+ site, Ho3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ho–O bond distances ranging from 2.27–2.61 Å. There are three inequivalent Se4+ sites. In the first Se4+ site, Se4+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. There are a spread of Se–O bond distances ranging from 1.69–1.76 Å. In the second Se4+ site, Se4+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. There is one shorter (1.71 Å) and two longer (1.75 Å) Se–O bond length. In the third Se4+ site, Se4+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. There is one shorter (1.70 Å) and two longer (1.74 Å) Se–O bond length. There are nine inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to one Ho3+ and one Se4+ atom. In the second O2- site, O2- is bonded in a bent 150 degrees geometry to one Ho3+ and one Se4+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to two Ho3+ and one Se4+ atom. In the fourth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Ho3+ and one Se4+ atom. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to two Ho3+ and one Se4+ atom. In the sixth O2- site, O2- is bonded in a 2-coordinate geometry to two Ho3+ and one Se4+ atom. In the seventh O2- site, O2- is bonded in a bent 120 degrees geometry to one Ho3+ and one Se4+ atom. In the eighth O2- site, O2- is bonded in a 3-coordinate geometry to two Ho3+ and one Se4+ atom. In the ninth O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Ho3+ and one Se4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2022

Low- and intermediate-temperature oxidation of dimethyl ether up to 100 atm in a supercritical pressure jet-stirred reactor

Understanding the low- and intermediate-temperature oxidation chemistry of oxygenated fuels like dimethyl ether (DME) at high pressure is paramount to the development of advanced engines with low carbon emissions. The supercritical pressure jet-stirred reactor (SP-JSR) recently developed at Princeton provides a new platform for conducting kinetic studies at low and intermediate temperatures at extremely high pressures with a uniform temperature distribution and a short flow residence time. This paper uses the SP-JSR to investigate DME oxidation at equivalence ratios of 0.175, 1.0, and 1.72, for pressures of 10 and 100 atm, and temperatures ranging from 400 to 900 K. The results demonstrate weakened NTC behavior at 100 atm relative to 10 atm due to increased flux through QOOH + O 2 = O 2 QOOH relative to QOOH = 2 CH 2 O + OH at 100 atm. Furthermore, the intermediate-temperature oxidation window is shifted to lower temperatures at 100 atm. The experimental data are compared with several chemical kinetic models from the literature. The existing models are seen to agree quite well with the experimental data at 10 atm. However, the models fail to properly capture the NTC behavior at 100 atm. Reaction pathway analyses indicate that both the low- and intermediate-temperature chemistries are controlled by RO 2 consumption pathways. The reaction rates for several of the important reactions, such as DME + OH = CH 3 OCH 2 + H 2 O, H 2 O 2 (+M) = 2 OH (+M), and 2 HO 2 = 2 OH + O 2 are updated in this work. Furthermore, the updated model improves the predictability for all key species compared to the original model.

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CH↗
DOE OSTI2024

Ab initio description of bcc iron with correlation matrix renormalization theory

We applied the ab initio spin-polarized correlation matrix renormalization theory to the ferromagnetic state of the bulk bcc iron. We showed that it was capable of reproducing the equilibrium physical properties and the pressure-volume curve in good comparison with experiments. We then focused on the analysis of its local electronic correlations. By exploiting different local fluctuation-related physical quantities as measures of electronic correlation within target orbits, we elucidated the different roles of t 2g and e g states in both spin channels and presented compelling evidence to showcase this distinction in their electronic correlation.

3-dimensional systems↗
DOE OSTI2020

Crystal structures and comparisons of potassium rare-earth molybdates KRE(MoO 4 ) 2 (RE = Tb, Dy, Ho, Er, Yb, and Lu)

Six potassium rare-earth molybdates KRE(MoO 4 ) 2 (RE = Tb, Dy, Ho, Er, Yb, and Lu) were synthesized by flux-assisted growth in K 2 Mo 3 O 10 . The crystal structures were determined using single-crystal X-ray diffraction data. The synthesized molybdates crystallize with the orthorhombic Pbcn space group (No. 60). Trendlines for unit-cell parameters were calculated using data from the current study. The unit-cell parameters a and c increase linearly whereas b decreases with larger RE cations, based on crystal radii. The unit-cell volumes increase linearly and the densities decrease linearly with larger RE cations. The average distances between the RE cations and the nearest O atoms increase with larger cations whereas the average distances of Mo—O and K—O do not show specific trends.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ho8Sb3O8 by Materials Project

Ho8Sb3O8 crystallizes in the monoclinic C2 space group. The structure is three-dimensional. there are four inequivalent Ho3+ sites. In the first Ho3+ site, Ho3+ is bonded in a 3-coordinate geometry to four Sb+2.67- and three O2- atoms. There are a spread of Ho–Sb bond distances ranging from 3.26–3.46 Å. There are a spread of Ho–O bond distances ranging from 2.21–2.23 Å. In the second Ho3+ site, Ho3+ is bonded in a distorted see-saw-like geometry to two equivalent Sb+2.67- and four O2- atoms. Both Ho–Sb bond lengths are 3.21 Å. There are a spread of Ho–O bond distances ranging from 2.22–2.43 Å. In the third Ho3+ site, Ho3+ is bonded in a distorted see-saw-like geometry to two equivalent Sb+2.67- and four O2- atoms. Both Ho–Sb bond lengths are 3.25 Å. There are three shorter (2.21 Å) and one longer (2.31 Å) Ho–O bond lengths. In the fourth Ho3+ site, Ho3+ is bonded in a 4-coordinate geometry to four Sb+2.67- and four O2- atoms. There are a spread of Ho–Sb bond distances ranging from 3.30–3.50 Å. There are a spread of Ho–O bond distances ranging from 2.20–2.32 Å. There are two inequivalent Sb+2.67- sites. In the first Sb+2.67- site, Sb+2.67- is bonded in a body-centered cubic geometry to eight Ho3+ atoms. In the second Sb+2.67- site, Sb+2.67- is bonded in a body-centered cubic geometry to eight Ho3+ atoms. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded to four Ho3+ atoms to form a mixture of edge and corner-sharing OHo4 tetrahedra. In the second O2- site, O2- is bonded to four Ho3+ atoms to form a mixture of edge and corner-sharing OHo4 tetrahedra. In the third O2- site, O2- is bonded to four Ho3+ atoms to form a mixture of edge and corner-sharing OHo4 trigonal pyramids. In the fourth O2- site, O2- is bonded in a distorted trigonal planar geometry to three Ho3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ho4MgS7 by Materials Project

MgHo4S7 crystallizes in the monoclinic Cm space group. The structure is three-dimensional. Mg2+ is bonded to six S2- atoms to form MgS6 octahedra that share corners with three HoS6 octahedra, corners with six HoS7 pentagonal bipyramids, edges with two equivalent MgS6 octahedra, edges with three equivalent HoS6 octahedra, and an edgeedge with one HoS7 pentagonal bipyramid. The corner-sharing octahedra tilt angles range from 3–55°. There are a spread of Mg–S bond distances ranging from 2.55–2.69 Å. There are four inequivalent Ho3+ sites. In the first Ho3+ site, Ho3+ is bonded to seven S2- atoms to form distorted HoS7 pentagonal bipyramids that share corners with four equivalent MgS6 octahedra, corners with four HoS6 octahedra, an edgeedge with one MgS6 octahedra, edges with three equivalent HoS6 octahedra, edges with two equivalent HoS7 pentagonal bipyramids, and faces with two equivalent HoS7 pentagonal bipyramids. The corner-sharing octahedra tilt angles range from 19–74°. There are a spread of Ho–S bond distances ranging from 2.70–3.06 Å. In the second Ho3+ site, Ho3+ is bonded to seven S2- atoms to form distorted HoS7 pentagonal bipyramids that share corners with two equivalent MgS6 octahedra, corners with six HoS6 octahedra, edges with four HoS6 octahedra, edges with two equivalent HoS7 pentagonal bipyramids, and faces with two equivalent HoS7 pentagonal bipyramids. The corner-sharing octahedra tilt angles range from 22–68°. There are a spread of Ho–S bond distances ranging from 2.69–2.98 Å. In the third Ho3+ site, Ho3+ is bonded to six S2- atoms to form HoS6 octahedra that share a cornercorner with one MgS6 octahedra, a cornercorner with one HoS6 octahedra, corners with four HoS7 pentagonal bipyramids, edges with two equivalent HoS6 octahedra, and edges with six HoS7 pentagonal bipyramids. The corner-sharing octahedra tilt angles range from 53–55°. There are a spread of Ho–S bond distances ranging from 2.65–2.72 Å. In the fourth Ho3+ site, Ho3+ is bonded to six S2- atoms to form HoS6 octahedra that share a cornercorner with one HoS6 octahedra, corners with two equivalent MgS6 octahedra, corners with six HoS7 pentagonal bipyramids, edges with two equivalent HoS6 octahedra, edges with three equivalent MgS6 octahedra, and an edgeedge with one HoS7 pentagonal bipyramid. The corner-sharing octahedra tilt angles range from 3–53°. There are a spread of Ho–S bond distances ranging from 2.66–2.77 Å. There are seven inequivalent S2- sites. In the first S2- site, S2- is bonded to one Mg2+ and four Ho3+ atoms to form distorted SHo4Mg trigonal bipyramids that share corners with five SHo3Mg tetrahedra, corners with four SHo5 trigonal bipyramids, an edgeedge with one SHo4 tetrahedra, and edges with five SHo4Mg trigonal bipyramids. In the second S2- site, S2- is bonded to two equivalent Mg2+ and three Ho3+ atoms to form distorted SHo3Mg2 trigonal bipyramids that share corners with five SHo3Mg tetrahedra, corners with four SHo5 trigonal bipyramids, an edgeedge with one SHo3Mg tetrahedra, and edges with five SHo4Mg trigonal bipyramids. In the third S2- site, S2- is bonded to five Ho3+ atoms to form distorted SHo5 trigonal bipyramids that share corners with four equivalent SHo3Mg tetrahedra, corners with six SHo4Mg trigonal bipyramids, edges with three SHo3Mg tetrahedra, and edges with six SHo3Mg2 trigonal bipyramids. In the fourth S2- site, S2- is bonded to five Ho3+ atoms to form distorted SHo5 trigonal bipyramids that share corners with four equivalent SHo4 tetrahedra, corners with six SHo4Mg trigonal bipyramids, edges with three SHo3Mg tetrahedra, and edges with six SHo4Mg trigonal bipyramids. In the fifth S2- site, S2- is bonded to one Mg2+ and three Ho3+ atoms to form distorted SHo3Mg tetrahedra that share corners with three SHo3Mg tetrahedra, corners with nine SHo4Mg trigonal bipyramids, and edges with four SHo3Mg2 trigonal bipyramids. In the sixth S2- site, S2- is bonded to four Ho3+ atoms to form distorted SHo4 tetrahedra that share corners with three SHo3Mg tetrahedra, corners with nine SHo4Mg trigonal bipyramids, and edges with four SHo4Mg trigonal bipyramids. In the seventh S2- site, S2- is bonded in a rectangular see-saw-like geometry to two equivalent Mg2+ and two equivalent Ho3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Rb3HoO3 by Materials Project

Rb3HoO3 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. there are three inequivalent Rb1+ sites. In the first Rb1+ site, Rb1+ is bonded in a 1-coordinate geometry to five O2- atoms. There are a spread of Rb–O bond distances ranging from 2.68–3.21 Å. In the second Rb1+ site, Rb1+ is bonded in a 4-coordinate geometry to four equivalent O2- atoms. There are two shorter (2.84 Å) and two longer (3.24 Å) Rb–O bond lengths. In the third Rb1+ site, Rb1+ is bonded in a 4-coordinate geometry to four equivalent O2- atoms. There are two shorter (2.93 Å) and two longer (3.21 Å) Rb–O bond lengths. Ho3+ is bonded to four O2- atoms to form edge-sharing HoO4 tetrahedra. There are a spread of Ho–O bond distances ranging from 2.11–2.19 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to one Rb1+ and two equivalent Ho3+ atoms. In the second O2- site, O2- is bonded in a 7-coordinate geometry to six Rb1+ and one Ho3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ho2Te4O11 by Materials Project

Ho2Te4O11 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. Ho3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ho–O bond distances ranging from 2.26–2.57 Å. There are two inequivalent Te4+ sites. In the first Te4+ site, Te4+ is bonded in a 3-coordinate geometry to four O2- atoms. There are a spread of Te–O bond distances ranging from 1.90–2.57 Å. In the second Te4+ site, Te4+ is bonded in a distorted see-saw-like geometry to four O2- atoms. There are a spread of Te–O bond distances ranging from 1.87–2.32 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Ho3+ and one Te4+ atom. In the second O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Ho3+ and two Te4+ atoms. In the third O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Ho3+ and one Te4+ atom. In the fourth O2- site, O2- is bonded in a bent 150 degrees geometry to two equivalent Te4+ atoms. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to one Ho3+ and two Te4+ atoms. In the sixth O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Ho3+ and one Te4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Cs3HoO3 by Materials Project

Cs3HoO3 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. there are three inequivalent Cs1+ sites. In the first Cs1+ site, Cs1+ is bonded in a 1-coordinate geometry to five O2- atoms. There are a spread of Cs–O bond distances ranging from 2.87–3.37 Å. In the second Cs1+ site, Cs1+ is bonded in a 4-coordinate geometry to four equivalent O2- atoms. There are two shorter (2.99 Å) and two longer (3.40 Å) Cs–O bond lengths. In the third Cs1+ site, Cs1+ is bonded in a 4-coordinate geometry to four equivalent O2- atoms. There are two shorter (3.12 Å) and two longer (3.27 Å) Cs–O bond lengths. Ho3+ is bonded to four O2- atoms to form edge-sharing HoO4 tetrahedra. There are a spread of Ho–O bond distances ranging from 2.13–2.21 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to one Cs1+ and two equivalent Ho3+ atoms. In the second O2- site, O2- is bonded in a 1-coordinate geometry to six Cs1+ and one Ho3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2024

Mechanism and Kinetics of Ethanol–Acetaldehyde Conversion to 1,3-Butadiene over Isolated Lewis Acid La Sites in Silanol Nests in Dealuminated Beta Zeolite

Biomass-derived ethanol (EtOH) and acetaldehyde (AcH) conversion to 1,3-butadiene (1,3-BD) is an alternative process for 1,3-BD production. The present investigation reports the preparation and characterization of isolated La sites introduced into the silanol nests in DeAlBEA as well as detailed studies of the mechanism and kinetics for the conversion of an EtOH-AcH mixture to 1,3-BD. La sites supported on DeAlBEA are found to be present as (≡SiO) 2 La-OH groups that are H-bonded with adjacent Si-OH groups, possessing high C-C coupling activity and stability, superior to state-of-the-art Y-DeAlBEA. La sites supported on silica (La-SiO 2 ) with a similar chemical structure but no H-bonding interaction with Si-OH groups were prepared for comparison. Lewis acid La sites promote AcH aldol condensation, and the activity of such sites is nearly identical for both La-DeAlBEA and La-SiO 2 . Further, the rate of C 4 product formation increases by a factor of 4.8 upon addition of EtOH to the feed of AcH over La-DeAlBEA, whereas that over La/SiO 2 remains unchanged. Investigation of the mechanism and kinetics of AcH aldol condensation and EtOH-AcH conversion to 1,3-BD revealed two C-C bond forming pathways-AcH aldol condensation by Lewis acid La sites and direct coupling of EtOH-AcH over H-bonded (≡SiO) 2 La-OH···HO-Si≡ sites. This study provides important information about the role of the local environment of isolated Lewis acid sites and their effects on the direct coupling of EtOH and AcH to form 1,3-BD.

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CH↗
DOE OSTI2020

Materials Data on Ho3ReO8 by Materials Project

Ho3ReO8 crystallizes in the monoclinic P2_1/m space group. The structure is three-dimensional. there are three inequivalent Ho3+ sites. In the first Ho3+ site, Ho3+ is bonded to seven O2- atoms to form distorted HoO7 pentagonal bipyramids that share corners with three equivalent ReO6 octahedra, corners with three equivalent HoO7 pentagonal bipyramids, an edgeedge with one ReO6 octahedra, and a faceface with one HoO7 pentagonal bipyramid. The corner-sharing octahedra tilt angles range from 49–60°. There are a spread of Ho–O bond distances ranging from 2.24–2.41 Å. In the second Ho3+ site, Ho3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Ho–O bond distances ranging from 2.36–2.44 Å. In the third Ho3+ site, Ho3+ is bonded to seven O2- atoms to form distorted HoO7 pentagonal bipyramids that share corners with three equivalent ReO6 octahedra, corners with three equivalent HoO7 pentagonal bipyramids, an edgeedge with one ReO6 octahedra, and a faceface with one HoO7 pentagonal bipyramid. The corner-sharing octahedra tilt angles range from 46–58°. There are a spread of Ho–O bond distances ranging from 2.24–2.42 Å. Re7+ is bonded to six O2- atoms to form ReO6 octahedra that share corners with six HoO7 pentagonal bipyramids and edges with two HoO7 pentagonal bipyramids. There are a spread of Re–O bond distances ranging from 1.84–1.95 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to two Ho3+ and one Re7+ atom. In the second O2- site, O2- is bonded in a 3-coordinate geometry to two Ho3+ and one Re7+ atom. In the third O2- site, O2- is bonded in a 1-coordinate geometry to two Ho3+ and one Re7+ atom. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to two Ho3+ and one Re7+ atom. In the fifth O2- site, O2- is bonded to four Ho3+ atoms to form a mixture of distorted corner and edge-sharing OHo4 tetrahedra. In the sixth O2- site, O2- is bonded in a 3-coordinate geometry to two Ho3+ and one Re7+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ce(HoS2)3 by Materials Project

Ce(HoS2)3 crystallizes in the monoclinic P2_1/m space group. The structure is three-dimensional. there are three inequivalent Ho3+ sites. In the first Ho3+ site, Ho3+ is bonded to seven S2- atoms to form distorted HoS7 pentagonal bipyramids that share corners with three HoS6 octahedra, edges with two equivalent HoS6 octahedra, and edges with four equivalent HoS7 pentagonal bipyramids. The corner-sharing octahedra tilt angles range from 39–50°. There are a spread of Ho–S bond distances ranging from 2.69–2.93 Å. In the second Ho3+ site, Ho3+ is bonded to six S2- atoms to form HoS6 octahedra that share corners with three equivalent HoS6 octahedra, a cornercorner with one HoS7 pentagonal bipyramid, edges with four equivalent HoS6 octahedra, and edges with two equivalent HoS7 pentagonal bipyramids. The corner-sharing octahedra tilt angles range from 54–62°. There are a spread of Ho–S bond distances ranging from 2.66–2.77 Å. In the third Ho3+ site, Ho3+ is bonded to six S2- atoms to form HoS6 octahedra that share corners with three equivalent HoS6 octahedra, corners with two equivalent HoS7 pentagonal bipyramids, and edges with four equivalent HoS6 octahedra. The corner-sharing octahedra tilt angles range from 54–62°. There are a spread of Ho–S bond distances ranging from 2.66–2.79 Å. Ce3+ is bonded in a 8-coordinate geometry to eight S2- atoms. There are a spread of Ce–S bond distances ranging from 2.90–3.04 Å. There are six inequivalent S2- sites. In the first S2- site, S2- is bonded in a 4-coordinate geometry to four Ho3+ atoms. In the second S2- site, S2- is bonded to three Ho3+ and one Ce3+ atom to form distorted SCeHo3 trigonal pyramids that share corners with two equivalent SCe2Ho3 square pyramids, corners with four SCe2Ho3 trigonal bipyramids, corners with two equivalent SCeHo3 trigonal pyramids, edges with three equivalent SCe2Ho3 square pyramids, and edges with two equivalent SCe3Ho2 trigonal bipyramids. In the third S2- site, S2- is bonded in a rectangular see-saw-like geometry to four Ho3+ atoms. In the fourth S2- site, S2- is bonded to three equivalent Ho3+ and two equivalent Ce3+ atoms to form distorted SCe2Ho3 square pyramids that share corners with six SCe2Ho3 trigonal bipyramids, corners with two equivalent SCeHo3 trigonal pyramids, edges with four equivalent SCe2Ho3 square pyramids, edges with two SCe2Ho3 trigonal bipyramids, and edges with three equivalent SCeHo3 trigonal pyramids. In the fifth S2- site, S2- is bonded to three Ho3+ and two equivalent Ce3+ atoms to form distorted SCe2Ho3 trigonal bipyramids that share corners with two equivalent SCe2Ho3 square pyramids, corners with two equivalent SCe3Ho2 trigonal bipyramids, corners with three equivalent SCeHo3 trigonal pyramids, an edgeedge with one SCe2Ho3 square pyramid, and edges with five SCe2Ho3 trigonal bipyramids. In the sixth S2- site, S2- is bonded to two equivalent Ho3+ and three equivalent Ce3+ atoms to form distorted SCe3Ho2 trigonal bipyramids that share corners with four equivalent SCe2Ho3 square pyramids, corners with two equivalent SCe2Ho3 trigonal bipyramids, a cornercorner with one SCeHo3 trigonal pyramid, an edgeedge with one SCe2Ho3 square pyramid, edges with seven SCe2Ho3 trigonal bipyramids, and edges with two equivalent SCeHo3 trigonal pyramids.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na3HoBr6 by Materials Project

Na3HoBr6 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are two inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded to six Br1- atoms to form NaBr6 octahedra that share corners with six equivalent HoBr6 octahedra. The corner-sharing octahedra tilt angles range from 40–45°. There are a spread of Na–Br bond distances ranging from 2.91–3.07 Å. In the second Na1+ site, Na1+ is bonded in a 5-coordinate geometry to seven Br1- atoms. There are a spread of Na–Br bond distances ranging from 2.99–3.69 Å. Ho3+ is bonded to six Br1- atoms to form HoBr6 octahedra that share corners with six equivalent NaBr6 octahedra. The corner-sharing octahedra tilt angles range from 40–45°. There are a spread of Ho–Br bond distances ranging from 2.78–2.82 Å. There are three inequivalent Br1- sites. In the first Br1- site, Br1- is bonded to three Na1+ and one Ho3+ atom to form a mixture of distorted edge and corner-sharing BrNa3Ho trigonal pyramids. In the second Br1- site, Br1- is bonded to three Na1+ and one Ho3+ atom to form a mixture of distorted edge and corner-sharing BrNa3Ho trigonal pyramids. In the third Br1- site, Br1- is bonded in a 3-coordinate geometry to four Na1+ and one Ho3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ho3Sb5O12 by Materials Project

Ho3Sb5O12 crystallizes in the cubic I-43m space group. The structure is three-dimensional. Ho3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are four shorter (2.25 Å) and four longer (2.60 Å) Ho–O bond lengths. There are two inequivalent Sb3+ sites. In the first Sb3+ site, Sb3+ is bonded in a 3-coordinate geometry to three equivalent O2- atoms. All Sb–O bond lengths are 2.04 Å. In the second Sb3+ site, Sb3+ is bonded in a 4-coordinate geometry to four O2- atoms. There are two shorter (1.99 Å) and two longer (2.23 Å) Sb–O bond lengths. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Ho3+ and two Sb3+ atoms. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Ho3+ and one Sb3+ atom.

36 MATERIALS SCIENCE↗