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  |  |     | # | Species | Formula |    | 1852 | Al(III)F6(3-) (YAXXAW) (Geo) | F6Al |  |    | 1853 | Al(III)F6(3-) (YAXXAW) | F6Al |  |    | 1854 | Sodium tetrafluoroaluminate | F4NaAl |  |    | 1855 | Dialuminum oxide, cation | OAl2 |  |    | 1856 | Al2O (Geo) | OAl2 |  |    | 1857 | Dialuminum oxide | OAl2 |  |    | 1858 | Al2O2, cation | O2Al2 |  |    | 1859 | Aluminum oxide, dimer | O2Al2 |  |    | 1860 | Aluminum trifluoride, dimer | F6Al2 |  |    | 1861 | Silicon, cation | Si |  |    | 1862 | Silicon, 1D(g) 3s(2)3p(2) | Si |  |    | 1863 | Silicon, 1S(g) 3s(2)3p(2) | Si |  |    | 1864 | Silicon, 3D(u) 3s(1)3p(3) | Si |  |    | 1865 | Silicon, 5S(u) 3s(1)3p(3) | Si |  |    | 1866 | Silicon, atom | Si |  |    | 1867 | SiH | HSi |  |    | 1868 | SiH (Geo) | HSi |  |    | 1869 | Silylene (singlet) (Geo) | H2Si |  |    | 1870 | Silylene (singlet) | H2Si |  |    | 1871 | Silyl, cation | H3Si |  |    | 1872 | Silyl | H3Si |  | 
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