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Sr(H8O5)2 crystallizes in the triclinic P1 space group. The structure is two-dimensional and consists of one Sr(H8O5)2 sheet oriented in the (0, 0, 1) direction. there are two inequivalent Sr sites. In the first Sr site, Sr is bonded in a 8-coordinate geometry to eight O atoms. There are a spread of Sr–O bond distances ranging from 2.54–2.78 Å. In the second Sr site, Sr is bonded in a 8-coordinate geometry to one H and seven O atoms. The Sr–H bond length is 2.60 Å. There are a spread of Sr–O bond distances ranging from 2.56–2.71 Å. There are thirty-two inequivalent H sites. In the first H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.98 Å. In the second H site, H is bonded in a linear geometry to two O atoms. There is one shorter (1.04 Å) and one longer (1.55 Å) H–O bond length. In the third H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.97 Å. In the fourth H site, H is bonded in a distorted single-bond geometry to two O atoms. There is one shorter (1.03 Å) and one longer (1.65 Å) H–O bond length. In the fifth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.98 Å. In the sixth H site, H is bonded in a linear geometry to two O atoms. There is one shorter (1.03 Å) and one longer (1.59 Å) H–O bond length. In the seventh H site, H is bonded in a linear geometry to two O atoms. There is one shorter (1.02 Å) and one longer (1.59 Å) H–O bond length. In the eighth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.98 Å. In the ninth H site, H is bonded in a distorted linear geometry to two O atoms. There is one shorter (1.02 Å) and one longer (1.62 Å) H–O bond length. In the tenth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 1.00 Å. In the eleventh H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 1.00 Å. In the twelfth H site, H is bonded in a single-bond geometry to two O atoms. There is one shorter (1.00 Å) and one longer (1.78 Å) H–O bond length. In the thirteenth H site, H is bonded in a distorted linear geometry to two O atoms. There is one shorter (1.02 Å) and one longer (1.62 Å) H–O bond length. In the fourteenth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 1.01 Å. In the fifteenth H site, H is bonded in a single-bond geometry to two O atoms. There is one shorter (1.01 Å) and one longer (1.71 Å) H–O bond length. In the sixteenth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 1.00 Å. In the seventeenth H site, H is bonded in a distorted single-bond geometry to one O atom. The H–O bond length is 1.00 Å. In the eighteenth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.99 Å. In the nineteenth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.99 Å. In the twentieth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.99 Å. In the twenty-first H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.98 Å. In the twenty-second H site, H is bonded in a linear geometry to two O atoms. There is one shorter (1.06 Å) and one longer (1.46 Å) H–O bond length. In the twenty-third H site, H is bonded in a distorted bent 150 degrees geometry to two O atoms. There is one shorter (1.06 Å) and one longer (1.48 Å) H–O bond length. In the twenty-fourth H site, H is bonded in a single-bond geometry to one Sr and one O atom. The H–O bond length is 0.99 Å. In the twenty-fifth H site, H is bonded in a distorted linear geometry to two O atoms. There is one shorter (1.03 Å) and one longer (1.58 Å) H–O bond length. In the twenty-sixth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 1.00 Å. In the twenty-seventh H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 1.00 Å. In the twenty-eighth H site, H is bonded in a single-bond geometry to two O atoms. There is one shorter (1.02 Å) and one longer (1.68 Å) H–O bond length. In the twenty-ninth H site, H is bonded in a distorted linear geometry to two O atoms. There is one shorter (1.02 Å) and one longer (1.62 Å) H–O bond length. In the thirtieth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 1.00 Å. In the thirty-first H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 1.00 Å. In the thirty-second H site, H is bonded in a linear geometry to two O atoms. There is one shorter (1.03 Å) and one longer (1.59 Å) H–O bond length. There are twenty inequivalent O sites. In the first O site, O is bonded in a distorted trigonal pyramidal geometry to three H and one O atom. The O–O bond length is 1.50 Å. In the second O site, O is bonded in a 2-coordinate geometry to four H and one O atom. The O–O bond length is 1.48 Å. In the third O site, O is bonded in a distorted single-bond geometry to one H and one O atom. In the fourth O site, O is bonded in a 5-coordinate geometry to four H and one O atom. In the fifth O site, O is bonded in a bent 120 degrees geometry to one Sr and two H atoms. In the sixth O site, O is bonded in a water-like geometry to one Sr and two H atoms. In the seventh O site, O is bonded in a water-like geometry to one Sr and two H atoms. In the eighth O site, O is bonded in a water-like geometry to one Sr and two H atoms. In the ninth O site, O is bonded in a water-like geometry to one Sr and two H atoms. In the tenth O site, O is bonded in a water-like geometry to one Sr and two H atoms. In the eleventh O site, O is bonded in a water-like geometry to one Sr and two H atoms. In the twelfth O site, O is bonded in a water-like geometry to one Sr and two H atoms. In the thirteenth O site, O is bonded in a water-like geometry to one Sr and two H atoms. In the fourteenth O site, O is bonded in a water-like geometry to one Sr and two H atoms. In the fifteenth O site, O is bonded in a water-like geometry to one Sr and two H atoms. In the sixteenth O site, O is bonded in a distorted tetrahedral geometry to four H atoms. In the seventeenth O site, O is bonded in a water-like geometry to one Sr and two H atoms. In the eighteenth O site, O is bonded in a water-like geometry to one Sr and two H atoms. In the nineteenth O site, O is bonded in a water-like geometry to one Sr and two H atoms. In the twentieth O site, O is bonded in a water-like geometry to one Sr and two H atoms.

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