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DOE OSTI2020

Materials Data on Si2H2O3 by Materials Project

Si10(H3O5)3Si10H11O15 crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one Si10(H3O5)3 cluster and one Si10H11O15 cluster. In the Si10(H3O5)3 cluster, there are ten inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded in a distorted T-shaped geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.77–1.86 Å. In the second Si4+ site, Si4+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.69–2.25 Å. In the third Si4+ site, Si4+ is bonded in a distorted T-shaped geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.66–1.89 Å. In the fourth Si4+ site, Si4+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.65–2.11 Å. In the fifth Si4+ site, Si4+ is bonded in a distorted T-shaped geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.73–1.97 Å. In the sixth Si4+ site, Si4+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.68–1.75 Å. In the seventh Si4+ site, Si4+ is bonded in a distorted T-shaped geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.64–2.10 Å. In the eighth Si4+ site, Si4+ is bonded in a water-like geometry to two O2- atoms. There is one shorter (1.64 Å) and one longer (1.72 Å) Si–O bond length. In the ninth Si4+ site, Si4+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.66–1.99 Å. In the tenth Si4+ site, Si4+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.67–1.94 Å. There are nine inequivalent H1- sites. In the first H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.02 Å. In the second H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the third H1- site, H1- is bonded in a distorted linear geometry to two O2- atoms. There is one shorter (1.03 Å) and one longer (1.58 Å) H–O bond length. In the fourth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the fifth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the sixth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the seventh H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the eighth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the ninth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. There are fifteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to two Si4+ and one H1- atom. In the second O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two Si4+ atoms. In the third O2- site, O2- is bonded in a 3-coordinate geometry to two Si4+ and one H1- atom. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to two Si4+ and one H1- atom. In the fifth O2- site, O2- is bonded in a trigonal planar geometry to two Si4+ and one H1- atom. In the sixth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Si4+ and one H1- atom. In the seventh O2- site, O2- is bonded in a linear geometry to two Si4+ atoms. In the eighth O2- site, O2- is bonded in a bent 150 degrees geometry to two Si4+ atoms. In the ninth O2- site, O2- is bonded in a 1-coordinate geometry to two Si4+ and one H1- atom. In the tenth O2- site, O2- is bonded in a distorted single-bond geometry to two Si4+ and one H1- atom. In the eleventh O2- site, O2- is bonded in a 1-coordinate geometry to two Si4+ and one H1- atom. In the twelfth O2- site, O2- is bonded in a bent 150 degrees geometry to two Si4+ atoms. In the thirteenth O2- site, O2- is bonded in a bent 150 degrees geometry to two Si4+ atoms. In the fourteenth O2- site, O2- is bonded in a 1-coordinate geometry to two Si4+ and one H1- atom. In the fifteenth O2- site, O2- is bonded in a bent 120 degrees geometry to one Si4+ and one H1- atom. In the Si10H11O15 cluster, there are ten inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded in a distorted T-shaped geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.71–1.97 Å. In the second Si4+ site, Si4+ is bonded in an L-shaped geometry to two O2- atoms. There is one shorter (1.72 Å) and one longer (1.96 Å) Si–O bond length. In the third Si4+ site, Si4+ is bonded in a distorted T-shaped geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.68–1.98 Å. In the fourth Si4+ site, Si4+ is bonded in a distorted T-shaped geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.65–2.14 Å. In the fifth Si4+ site, Si4+ is bonded in a distorted T-shaped geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.70–1.92 Å. In the sixth Si4+ site, Si4+ is bonded in a distorted T-shaped geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.70–1.92 Å. In the seventh Si4+ site, Si4+ is bonded in a distorted T-shaped geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.70–1.90 Å. In the eighth Si4+ site, Si4+ is bonded in a distorted T-shaped geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.70–1.88 Å. In the ninth Si4+ site, Si4+ is bonded in a tetrahedral geometry to one H1- and three O2- atoms. The Si–H bond length is 1.47 Å. There are a spread of Si–O bond distances ranging from 1.61–1.71 Å. In the tenth Si4+ site, Si4+ is bonded in a tetrahedral geometry to one H1- and three O2- atoms. The Si–H bond length is 1.47 Å. There are a spread of Si–O bond distances ranging from 1.61–1.71 Å. There are eleven inequivalent H1- sites. In the first H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the second H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the third H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the fourth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the fifth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the sixth H1- site, H1- is bonded in a single-bond geometry to one Si4+ atom. In the seventh H1- site, H1- is bonded in a single-bond geometry to one Si4+ atom. In the eighth H1- site, H1- is bonded in a linear geometry to two O2- atoms. There is one shorter (1.04 Å) and one longer (1.53 Å) H–O bond length. In the ninth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.00 Å. In the tenth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.03 Å. In the eleventh H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.04 Å. There are fifteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to two Si4+ and one H1- atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to two Si4+ and one H1- atom. In the third O2- site, O2- is bonded in a linear geometry to two Si4+ atoms. In the fourth O2- site, O2- is bonded in a bent 150 degrees geometry to two Si4+ atoms. In the fifth O2- site, O2- is bonded in a distorted single-bond geometry to two Si4+ and one H1- atom. In the sixth O2- site, O2- is bonded in a distorted single-bond geometry to two Si4+ and one H1- atom. In the seventh O2- site, O2- is bonded in a linear geometry to two Si4+ atoms. In the eighth O2- site, O2- is bonded in a linear geometry to two Si4+ atoms. In the ninth O2- site, O2- is bonded in a bent 150 degrees geometry to two Si4+ atoms. In the tenth O2- site, O2- is bonded in a bent 150 degrees geometry to two Si4+ atoms. In the eleventh O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one Si4+ and two H1- atoms. In the twelfth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Si4+ and one H1- atom. In the thirteenth O2- site, O2- is bonded in a 3-coordinate geometry to two Si4+ and one H1- atom. In the fourteenth O2- site, O2- is bonded in a distorted single-bond geometry to two Si4+ and one H1- atom. In the fifteenth O2- site, O2- is bonded in a 3-coordinate geometry to two Si4+ and one H1- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Si2H2O3 by Materials Project

Si2H2O3 crystallizes in the monoclinic Cc space group. The structure is zero-dimensional and consists of four Si2H2O3 clusters. there are ten inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded in a distorted trigonal non-coplanar geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.77–1.92 Å. In the second Si4+ site, Si4+ is bonded in a distorted trigonal non-coplanar geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.83–1.89 Å. In the third Si4+ site, Si4+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.63–2.02 Å. In the fourth Si4+ site, Si4+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.78–1.92 Å. In the fifth Si4+ site, Si4+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.66–1.92 Å. In the sixth Si4+ site, Si4+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.62–2.19 Å. In the seventh Si4+ site, Si4+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.68–1.86 Å. In the eighth Si4+ site, Si4+ is bonded in a distorted trigonal non-coplanar geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.65–2.01 Å. In the ninth Si4+ site, Si4+ is bonded in a distorted T-shaped geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.63–1.94 Å. In the tenth Si4+ site, Si4+ is bonded in a distorted T-shaped geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.64–1.91 Å. There are ten inequivalent H1- sites. In the first H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.03 Å. In the second H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.02 Å. In the third H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the fourth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.01 Å. In the fifth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.06 Å. In the sixth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the seventh H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the eighth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the ninth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the tenth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. There are fifteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted T-shaped geometry to two Si4+ and one H1- atom. In the second O2- site, O2- is bonded in a distorted T-shaped geometry to two Si4+ and one H1- atom. In the third O2- site, O2- is bonded in a bent 150 degrees geometry to two Si4+ atoms. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to two Si4+ and one H1- atom. In the fifth O2- site, O2- is bonded in a bent 150 degrees geometry to two Si4+ atoms. In the sixth O2- site, O2- is bonded in a bent 150 degrees geometry to two Si4+ atoms. In the seventh O2- site, O2- is bonded in a bent 150 degrees geometry to two Si4+ atoms. In the eighth O2- site, O2- is bonded in a bent 120 degrees geometry to two Si4+ atoms. In the ninth O2- site, O2- is bonded in a 1-coordinate geometry to two Si4+ and one H1- atom. In the tenth O2- site, O2- is bonded in a 3-coordinate geometry to two Si4+ and one H1- atom. In the eleventh O2- site, O2- is bonded in a distorted T-shaped geometry to two Si4+ and one H1- atom. In the twelfth O2- site, O2- is bonded in a distorted single-bond geometry to two Si4+ and one H1- atom. In the thirteenth O2- site, O2- is bonded in a 1-coordinate geometry to two Si4+ and one H1- atom. In the fourteenth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Si4+ and one H1- atom. In the fifteenth O2- site, O2- is bonded in a 3-coordinate geometry to two Si4+ and one H1- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Si2H2O3 by Materials Project

Si2H2O3 crystallizes in the monoclinic Cc space group. The structure is zero-dimensional and consists of four Si2H2O3 clusters. there are ten inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.82–1.88 Å. In the second Si4+ site, Si4+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.63–2.00 Å. In the third Si4+ site, Si4+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.76–1.99 Å. In the fourth Si4+ site, Si4+ is bonded in a distorted trigonal non-coplanar geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.82–1.87 Å. In the fifth Si4+ site, Si4+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.64–2.22 Å. In the sixth Si4+ site, Si4+ is bonded in a distorted trigonal non-coplanar geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.64–2.00 Å. In the seventh Si4+ site, Si4+ is bonded in a distorted trigonal non-coplanar geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.69–1.97 Å. In the eighth Si4+ site, Si4+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.67–2.02 Å. In the ninth Si4+ site, Si4+ is bonded in a distorted trigonal non-coplanar geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.65–2.03 Å. In the tenth Si4+ site, Si4+ is bonded in a distorted T-shaped geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.64–1.98 Å. There are ten inequivalent H1- sites. In the first H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the second H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.00 Å. In the third H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the fourth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the fifth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.00 Å. In the sixth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the seventh H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the eighth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the ninth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the tenth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. There are fifteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to two Si4+ and one H1- atom. In the second O2- site, O2- is bonded in a distorted T-shaped geometry to two Si4+ and one H1- atom. In the third O2- site, O2- is bonded in a 2-coordinate geometry to two Si4+ and one H1- atom. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to two Si4+ and one H1- atom. In the fifth O2- site, O2- is bonded in a bent 150 degrees geometry to two Si4+ atoms. In the sixth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two Si4+ atoms. In the seventh O2- site, O2- is bonded in a bent 150 degrees geometry to two Si4+ atoms. In the eighth O2- site, O2- is bonded in a bent 150 degrees geometry to two Si4+ atoms. In the ninth O2- site, O2- is bonded in a distorted single-bond geometry to two Si4+ and one H1- atom. In the tenth O2- site, O2- is bonded in a bent 150 degrees geometry to two Si4+ atoms. In the eleventh O2- site, O2- is bonded in a 1-coordinate geometry to two Si4+ and one H1- atom. In the twelfth O2- site, O2- is bonded in a distorted single-bond geometry to two Si4+ and one H1- atom. In the thirteenth O2- site, O2- is bonded in a 1-coordinate geometry to two Si4+ and one H1- atom. In the fourteenth O2- site, O2- is bonded in a 1-coordinate geometry to two Si4+ and one H1- atom. In the fifteenth O2- site, O2- is bonded in a 1-coordinate geometry to two Si4+ and one H1- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Si2H2O3 by Materials Project

Si2H2O3 crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one Si2H2O3 cluster. there are twenty inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.66–1.80 Å. In the second Si4+ site, Si4+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.66–2.28 Å. In the third Si4+ site, Si4+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.67–2.22 Å. In the fourth Si4+ site, Si4+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.67–1.98 Å. In the fifth Si4+ site, Si4+ is bonded in an L-shaped geometry to two O2- atoms. There is one shorter (1.71 Å) and one longer (2.02 Å) Si–O bond length. In the sixth Si4+ site, Si4+ is bonded in a distorted T-shaped geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.78–1.87 Å. In the seventh Si4+ site, Si4+ is bonded in a water-like geometry to two O2- atoms. There is one shorter (1.67 Å) and one longer (1.69 Å) Si–O bond length. In the eighth Si4+ site, Si4+ is bonded in an L-shaped geometry to two O2- atoms. There is one shorter (1.70 Å) and one longer (1.96 Å) Si–O bond length. In the ninth Si4+ site, Si4+ is bonded in a distorted T-shaped geometry to three O2- atoms. There is two shorter (1.73 Å) and one longer (2.01 Å) Si–O bond length. In the tenth Si4+ site, Si4+ is bonded in a distorted T-shaped geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.69–2.01 Å. In the eleventh Si4+ site, Si4+ is bonded in a distorted T-shaped geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.69–2.01 Å. In the twelfth Si4+ site, Si4+ is bonded in a distorted T-shaped geometry to three O2- atoms. There is one shorter (1.72 Å) and two longer (1.88 Å) Si–O bond length. In the thirteenth Si4+ site, Si4+ is bonded in a distorted T-shaped geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.69–1.99 Å. In the fourteenth Si4+ site, Si4+ is bonded in a water-like geometry to two O2- atoms. There is one shorter (1.70 Å) and one longer (2.05 Å) Si–O bond length. In the fifteenth Si4+ site, Si4+ is bonded in a distorted trigonal non-coplanar geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.65–1.80 Å. In the sixteenth Si4+ site, Si4+ is bonded in a distorted T-shaped geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.67–2.00 Å. In the seventeenth Si4+ site, Si4+ is bonded in a 4-coordinate geometry to one H1- and three O2- atoms. The Si–H bond length is 1.92 Å. There are a spread of Si–O bond distances ranging from 1.66–1.84 Å. In the eighteenth Si4+ site, Si4+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.65–1.80 Å. In the nineteenth Si4+ site, Si4+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.70–2.12 Å. In the twentieth Si4+ site, Si4+ is bonded in a distorted trigonal non-coplanar geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.67–1.79 Å. There are twenty inequivalent H1- sites. In the first H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.97 Å. In the second H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the third H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.00 Å. In the fourth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the fifth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the sixth H1- site, H1- is bonded in a distorted linear geometry to two O2- atoms. There is one shorter (1.01 Å) and one longer (1.63 Å) H–O bond length. In the seventh H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the eighth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the ninth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the tenth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the eleventh H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.00 Å. In the twelfth H1- site, H1- is bonded in a linear geometry to two O2- atoms. There is one shorter (1.07 Å) and one longer (1.43 Å) H–O bond length. In the thirteenth H1- site, H1- is bonded in a distorted single-bond geometry to two O2- atoms. There is one shorter (1.01 Å) and one longer (1.61 Å) H–O bond length. In the fourteenth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.04 Å. In the fifteenth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the sixteenth H1- site, H1- is bonded in a distorted single-bond geometry to two O2- atoms. There is one shorter (1.00 Å) and one longer (1.66 Å) H–O bond length. In the seventeenth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the eighteenth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.01 Å. In the nineteenth H1- site, H1- is bonded in a single-bond geometry to one Si4+ and one O2- atom. The H–O bond length is 1.11 Å. In the twentieth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. There are thirty inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 120 degrees geometry to one Si4+ and one H1- atom. In the second O2- site, O2- is bonded in a 1-coordinate geometry to two Si4+ and one H1- atom. In the third O2- site, O2- is bonded in a bent 150 degrees geometry to two Si4+ atoms. In the fourth O2- site, O2- is bonded in a bent 150 degrees geometry to two Si4+ atoms. In the fifth O2- site, O2- is bonded in a bent 150 degrees geometry to two Si4+ atoms. In the sixth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to two Si4+ and one H1- atom. In the seventh O2- site, O2- is bonded in a linear geometry to two Si4+ atoms. In the eighth O2- site, O2- is bonded in a bent 120 degrees geometry to one Si4+ and one H1- atom. In the ninth O2- site, O2- is bonded in a bent 120 degrees geometry to two Si4+ atoms. In the tenth O2- site, O2- is bonded in a bent 150 degrees geometry to two Si4+ atoms. In the eleventh O2- site, O2- is bonded in a distorted single-bond geometry to two Si4+ and two H1- atoms. In the twelfth O2- site, O2- is bonded in a 1-coordinate geometry to two Si4+ and one H1- atom. In the thirteenth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Si4+ and one H1- atom. In the fourteenth O2- site, O2- is bonded in a 1-coordinate geometry to one Si4+ and one H1- atom. In the fifteenth O2- site, O2- is bonded in a bent 150 degrees geometry to two Si4+ atoms. In the sixteenth O2- site, O2- is bonded in a bent 150 degrees geometry to two Si4+ atoms. In the seventeenth O2- site, O2- is bonded in a bent 150 degrees geometry to two Si4+ atoms. In the eighteenth O2- site, O2- is bonded in a bent 150 degrees geometry to two Si4+ atoms. In the nineteenth O2- site, O2- is bonded in a 1-coordinate geometry to two Si4+ and one H1- atom. In the twentieth O2- site, O2- is bonded in a distorted single-bond geometry to two Si4+ and one H1- atom. In the twenty-first O2- site, O2- is bonded in a distorted trigonal planar geometry to two Si4+ and one H1- atom. In the twenty-second O2- site, O2- is bonded in a distorted single-bond geometry to two Si4+ and two H1- atoms. In the twenty-third O2- site, O2- is bonded in a distorted single-bond geometry to two Si4+ and one H1- atom. In the twenty-fourth O2- site, O2- is bonded in a 3-coordinate geometry to two Si4+ and one H1- atom. In the twenty-fifth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one Si4+ and two H1- atoms. In the twenty-sixth O2- site, O2- is bonded in a 3-coordinate geometry to two Si4+ and one H1- atom. In the twenty-seventh O2- site, O2- is bonded in a distorted single-bond geometry to two Si4+ and two H1- atoms. In the twenty-eighth O2- site, O2- is bonded in a 1-coordinate geometry to two Si4+ and one H1- atom. In the twenty-ninth O2- site, O2- is bonded in a 3-coordinate geometry to two Si4+ and one H1- atom. In the thirtieth O2- site, O2- is bonded in a 1-coordinate geometry to two Si4+ and one H1- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Si2H2O3 by Materials Project

Si2H2O3 crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one Si2H2O3 cluster. there are twenty inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.63–1.80 Å. In the second Si4+ site, Si4+ is bonded in a distorted T-shaped geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.71–1.84 Å. In the third Si4+ site, Si4+ is bonded in an L-shaped geometry to two O2- atoms. There is one shorter (1.66 Å) and one longer (1.79 Å) Si–O bond length. In the fourth Si4+ site, Si4+ is bonded in an L-shaped geometry to two O2- atoms. There is one shorter (1.68 Å) and one longer (2.15 Å) Si–O bond length. In the fifth Si4+ site, Si4+ is bonded in a water-like geometry to two O2- atoms. There is one shorter (1.66 Å) and one longer (1.71 Å) Si–O bond length. In the sixth Si4+ site, Si4+ is bonded in an L-shaped geometry to two O2- atoms. There is one shorter (1.63 Å) and one longer (2.04 Å) Si–O bond length. In the seventh Si4+ site, Si4+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.69–1.92 Å. In the eighth Si4+ site, Si4+ is bonded in a water-like geometry to two O2- atoms. There is one shorter (1.67 Å) and one longer (1.87 Å) Si–O bond length. In the ninth Si4+ site, Si4+ is bonded in a water-like geometry to two O2- atoms. There is one shorter (1.67 Å) and one longer (1.71 Å) Si–O bond length. In the tenth Si4+ site, Si4+ is bonded in a distorted T-shaped geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.72–2.00 Å. In the eleventh Si4+ site, Si4+ is bonded in a distorted T-shaped geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.65–1.95 Å. In the twelfth Si4+ site, Si4+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.66–1.87 Å. In the thirteenth Si4+ site, Si4+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.67–1.75 Å. In the fourteenth Si4+ site, Si4+ is bonded in a water-like geometry to two O2- atoms. There is one shorter (1.69 Å) and one longer (1.94 Å) Si–O bond length. In the fifteenth Si4+ site, Si4+ is bonded in a distorted T-shaped geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.71–1.87 Å. In the sixteenth Si4+ site, Si4+ is bonded in a distorted T-shaped geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.70–1.90 Å. In the seventeenth Si4+ site, Si4+ is bonded in a distorted T-shaped geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.70–1.93 Å. In the eighteenth Si4+ site, Si4+ is bonded in a distorted T-shaped geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.66–1.86 Å. In the nineteenth Si4+ site, Si4+ is bonded in a tetrahedral geometry to one H1- and three O2- atoms. The Si–H bond length is 1.47 Å. There are a spread of Si–O bond distances ranging from 1.63–1.71 Å. In the twentieth Si4+ site, Si4+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. There are a spread of Si–O bond distances ranging from 1.69–1.82 Å. There are twenty inequivalent H1- sites. In the first H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.97 Å. In the second H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the third H1- site, H1- is bonded in a single-bond geometry to two O2- atoms. There is one shorter (1.01 Å) and one longer (1.70 Å) H–O bond length. In the fourth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.01 Å. In the fifth H1- site, H1- is bonded in a single-bond geometry to two O2- atoms. There is one shorter (1.01 Å) and one longer (1.69 Å) H–O bond length. In the sixth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the seventh H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the eighth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.05 Å. In the ninth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.97 Å. In the tenth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the eleventh H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.00 Å. In the twelfth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.01 Å. In the thirteenth H1- site, H1- is bonded in a single-bond geometry to one Si4+ atom. In the fourteenth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.00 Å. In the fifteenth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.00 Å. In the sixteenth H1- site, H1- is bonded in a linear geometry to two O2- atoms. There is one shorter (1.04 Å) and one longer (1.51 Å) H–O bond length. In the seventeenth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the eighteenth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the nineteenth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.00 Å. In the twentieth H1- site, H1- is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.03 Å. There are thirty inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 120 degrees geometry to one Si4+ and one H1- atom. In the second O2- site, O2- is bonded in a bent 120 degrees geometry to one Si4+ and one H1- atom. In the third O2- site, O2- is bonded in a bent 150 degrees geometry to two Si4+ atoms. In the fourth O2- site, O2- is bonded in a linear geometry to two Si4+ atoms. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to two Si4+ and one H1- atom. In the sixth O2- site, O2- is bonded in a bent 150 degrees geometry to two Si4+ atoms. In the seventh O2- site, O2- is bonded in a bent 150 degrees geometry to two Si4+ atoms. In the eighth O2- site, O2- is bonded in a bent 120 degrees geometry to one Si4+ and one H1- atom. In the ninth O2- site, O2- is bonded in a bent 150 degrees geometry to two Si4+ atoms. In the tenth O2- site, O2- is bonded in a 3-coordinate geometry to two Si4+ and one H1- atom. In the eleventh O2- site, O2- is bonded in a distorted single-bond geometry to two Si4+ and one H1- atom. In the twelfth O2- site, O2- is bonded in a distorted single-bond geometry to two Si4+ and one H1- atom. In the thirteenth O2- site, O2- is bonded in a distorted single-bond geometry to two Si4+ and one H1- atom. In the fourteenth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Si4+ and one H1- atom. In the fifteenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two Si4+ atoms. In the sixteenth O2- site, O2- is bonded in a bent 150 degrees geometry to two Si4+ atoms. In the seventeenth O2- site, O2- is bonded in a bent 150 degrees geometry to two Si4+ atoms. In the eighteenth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Si4+ and one H1- atom. In the nineteenth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Si4+ and one H1- atom. In the twentieth O2- site, O2- is bonded in a 3-coordinate geometry to two Si4+ and one H1- atom. In the twenty-first O2- site, O2- is bonded in a 1-coordinate geometry to two Si4+ and one H1- atom. In the twenty-second O2- site, O2- is bonded in a 3-coordinate geometry to one Si4+ and two H1- atoms. In the twenty-third O2- site, O2- is bonded in a bent 150 degrees geometry to two Si4+ atoms. In the twenty-fourth O2- site, O2- is bonded in a distorted single-bond geometry to two Si4+ and one H1- atom. In the twenty-fifth O2- site, O2- is bonded in a bent 120 degrees geometry to one Si4+ and one H1- atom. In the twenty-sixth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to two Si4+ and one H1- atom. In the twenty-seventh O2- site, O2- is bonded in a water-like geometry to one Si4+ and one H1- atom. In the twenty-eighth O2- site, O2- is bonded in a distorted single-bond geometry to two Si4+ and one H1- atom. In the twenty-ninth O2- site, O2- is bonded in a distorted single-bond geometry to two Si4+ and one H1- atom. In the thirtieth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Si4+ and one H1- atom.

36 MATERIALS SCIENCE↗