Materials Data on Ca3U by Materials Project
Ca3U is alpha bismuth trifluoride structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. there are two inequivalent Ca sites. In the first Ca site, Ca is bonded in a distorted body-centered cubic geometry to four equivalent Ca and four equivalent U atoms. All Ca–Ca bond lengths are 3.65 Å. All Ca–U bond lengths are 3.65 Å. In the second Ca site, Ca is bonded in a 8-coordinate geometry to eight equivalent Ca and six equivalent U atoms. All Ca–U bond lengths are 4.21 Å. U is bonded in a distorted body-centered cubic geometry to fourteen Ca atoms.
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