DOE OSTI2020
SrOI2 crystallizes in the monoclinic Pm space group. The structure is three-dimensional. there are four inequivalent Sr sites. In the first Sr site, Sr is bonded in a 2-coordinate geometry to two equivalent O and four I atoms. Both Sr–O bond lengths are 2.42 Å. There are a spread of Sr–I bond distances ranging from 3.47–3.77 Å. In the second Sr site, Sr is bonded in a 2-coordinate geometry to two equivalent O and four I atoms. Both Sr–O bond lengths are 2.42 Å. There are a spread of Sr–I bond distances ranging from 3.46–3.78 Å. In the third Sr site, Sr is bonded in a 2-coordinate geometry to two equivalent O and four I atoms. Both Sr–O bond lengths are 2.42 Å. There are a spread of Sr–I bond distances ranging from 3.46–3.82 Å. In the fourth Sr site, Sr is bonded in a 2-coordinate geometry to two equivalent O and four I atoms. Both Sr–O bond lengths are 2.42 Å. There are a spread of Sr–I bond distances ranging from 3.46–3.77 Å. There are four inequivalent O sites. In the first O site, O is bonded in a trigonal planar geometry to two equivalent Sr and one I atom. The O–I bond length is 2.01 Å. In the second O site, O is bonded in a trigonal planar geometry to two equivalent Sr and one I atom. The O–I bond length is 2.01 Å. In the third O site, O is bonded in a trigonal planar geometry to two equivalent Sr and one I atom. The O–I bond length is 2.01 Å. In the fourth O site, O is bonded in a trigonal planar geometry to two equivalent Sr and one I atom. The O–I bond length is 2.01 Å. There are eight inequivalent I sites. In the first I site, I is bonded in a 5-coordinate geometry to four Sr and one I atom. The I–I bond length is 3.33 Å. In the second I site, I is bonded in a 5-coordinate geometry to four Sr and one I atom. The I–I bond length is 3.34 Å. In the third I site, I is bonded in a 5-coordinate geometry to four Sr and one I atom. The I–I bond length is 3.34 Å. In the fourth I site, I is bonded in a 5-coordinate geometry to four Sr and one I atom. The I–I bond length is 3.34 Å. In the fifth I site, I is bonded in a distorted single-bond geometry to one O and one I atom. In the sixth I site, I is bonded in a distorted single-bond geometry to one O and one I atom. In the seventh I site, I is bonded in a distorted single-bond geometry to one O and one I atom. In the eighth I site, I is bonded in a distorted single-bond geometry to one O and one I atom.