Materials Data on TbAsS by Materials Project
TbAsS is Matlockite structured and crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Tb3+ is bonded in a 5-coordinate geometry to four equivalent As1- and five equivalent S2- atoms. There are a spread of Tb–As bond distances ranging from 3.11–3.18 Å. There are a spread of Tb–S bond distances ranging from 2.81–2.87 Å. As1- is bonded in a 8-coordinate geometry to four equivalent Tb3+ and four equivalent As1- atoms. There are a spread of As–As bond distances ranging from 2.55–2.91 Å. S2- is bonded to five equivalent Tb3+ atoms to form a mixture of distorted edge and corner-sharing STb5 trigonal bipyramids.
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