Materials Data on UH12S2O15 by Materials Project
UH12S2O15 crystallizes in the monoclinic C2/c space group. The structure is two-dimensional and consists of two UH12S2O15 sheets oriented in the (0, 0, 1) direction. U6+ is bonded to seven O2- atoms to form distorted UO7 pentagonal bipyramids that share corners with four equivalent SO4 tetrahedra. There are a spread of U–O bond distances ranging from 1.81–2.41 Å. There are six inequivalent H1+ sites. In the first 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 (1.67 Å) H–O bond length. In the second H1+ site, H1+ is bonded in a single-bond geometry to two O2- atoms. There is one shorter (1.00 Å) and one longer (1.70 Å) H–O bond length. 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 distorted linear geometry to two O2- atoms. There is one shorter (1.02 Å) and one longer (1.57 Å) H–O bond length. In the fifth H1+ site, H1+ is bonded in a linear geometry to two O2- atoms. There is one shorter (1.14 Å) and one longer (1.30 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. S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share corners with two equivalent UO7 pentagonal bipyramids. There are a spread of S–O bond distances ranging from 1.48–1.50 Å. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one U6+ and one S6+ atom. In the second O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one U6+ and one S6+ atom. In the third O2- site, O2- is bonded in a distorted water-like geometry to one U6+ and two equivalent H1+ atoms. In the fourth O2- site, O2- is bonded in a distorted trigonal planar geometry to two H1+ and one S6+ atom. In the fifth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one H1+ and one S6+ atom. In the sixth O2- site, O2- is bonded in a trigonal non-coplanar geometry to three H1+ atoms. In the seventh O2- site, O2- is bonded in a trigonal non-coplanar geometry to three H1+ atoms. In the eighth O2- site, O2- is bonded in a single-bond geometry to one U6+ atom.