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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Sn3O4 by Materials Project

Sn3O4 is Protactinium structured and crystallizes in the tetragonal P4/mnc space group. The structure is zero-dimensional and consists of two Sn3O4 clusters. there are two inequivalent Sn+2.67+ sites. In the first Sn+2.67+ site, Sn+2.67+ is bonded in a 4-coordinate geometry to four equivalent O2- atoms. There are two shorter (2.19 Å) and two longer (2.20 Å) Sn–O bond lengths. In the second Sn+2.67+ site, Sn+2.67+ is bonded in a 4-coordinate geometry to four equivalent O2- atoms. All Sn–O bond lengths are 2.10 Å. O2- is bonded in a trigonal non-coplanar geometry to three Sn+2.67+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Si(Sn3O4)2 by Materials Project

Si(Sn3O4)2 crystallizes in the hexagonal P6_3mc space group. The structure is three-dimensional. there are two inequivalent Sn2+ sites. In the first Sn2+ site, Sn2+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of Sn–O bond distances ranging from 2.09–2.52 Å. In the second Sn2+ site, Sn2+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of Sn–O bond distances ranging from 2.11–2.51 Å. Si4+ is bonded in a tetrahedral geometry to four O2- atoms. There is one shorter (1.66 Å) and three longer (1.67 Å) Si–O bond length. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a trigonal non-coplanar geometry to three Sn2+ atoms. In the second O2- site, O2- is bonded in a distorted single-bond geometry to three Sn2+ and one Si4+ atom. In the third O2- site, O2- is bonded in a trigonal planar geometry to three equivalent Sn2+ atoms. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to three equivalent Sn2+ and one Si4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sn5O6 by Materials Project

(SnO)2Sn3O4 crystallizes in the monoclinic P2_1/c space group. The structure is two-dimensional and consists of one Sn3O4 sheet oriented in the (0, 0, 1) direction and one SnO sheet oriented in the (0, 0, 1) direction. In the Sn3O4 sheet, there are two inequivalent Sn+2.40+ sites. In the first Sn+2.40+ site, Sn+2.40+ is bonded in a distorted T-shaped geometry to three O2- atoms. There are one shorter (2.11 Å) and two longer (2.14 Å) Sn–O bond lengths. In the second Sn+2.40+ site, Sn+2.40+ is bonded to six O2- atoms to form corner-sharing SnO6 octahedra. The corner-sharing octahedral tilt angles are 48°. There are a spread of Sn–O bond distances ranging from 2.10–2.12 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to three Sn+2.40+ atoms. In the second O2- site, O2- is bonded in a trigonal planar geometry to three Sn+2.40+ atoms. In the SnO sheet, Sn+2.40+ is bonded in a distorted T-shaped geometry to three equivalent O2- atoms. There are a spread of Sn–O bond distances ranging from 2.10–2.16 Å. O2- is bonded in a trigonal planar geometry to three equivalent Sn+2.40+ atoms.

36 MATERIALS SCIENCE↗
NASA NTRS1989

Tin in a chondritic interplanetary dust particle

Submicron platey Sn-rich grains are present in chondritic porous interplanetary dust particle (IDP) W7029 A and it is the second occurrence of a tin mineral in a stratospheric micrometeorite. Selected Area Electron Diffraction data for the Sn-rich grains match with Sn2O3 and Sn3O4. The oxide(s) may have formed in the solar nebula when tin metal catalytically supported reduction of CO or during flash heating on atmospheric entry of the IDP. The presence of tin is consistent with enrichments for other volatile trace elements in chondritic IDPs and may signal an emerging trend toward nonchondritic volatile element abundances in chondritic IDPs. The observation confirms small-scale mineralogical heterogeneity in fine-grained chondritic porous interplanetary dust.

Rietmeijer, Frans J. M.↗