# Telluride oxide

The telluride oxides or oxytellurides are double salts that contain both telluride and oxide anions (Te$^{2−}$ and O$^{2−}$). They are in the class of mixed anion compounds.
Compounds that can be mistakenly called "telluride oxides" are tellurium dioxide and tellurite.
Some of these are under investigation as photovoltaic materials, e.g. oxygen doped zinc telluride.

## Structure

Due to the different size and chemical nature of Te$^{2−}$ and O$^{2−}$ the ions occupy different positions in the crystal structure. Some of these structures are layered.
Many of the crystal systems are tetragonal. One unusual structure has stacked tubes made from tellurium, with nested tubes of antimony oxide, which contain alkali metal.

## List

| name | formula | MW | ratio Te:O | system | space group | unit cell Å | volume | density | optical | band gap | CAS |
| | V$_2$Te$_2$O | | 2:1 | tetragonal | | a = 3.9282 and c = 13.277 | | | | | |
| | KV$_3$Te$_3$O$_{0.42}$ | | | hexagonal | P6$_3$/m | a=9.62, c=4.48 | 359 | | | | |
| | Rb$_{0.8}$V$_2$Te$_2$O | | 2:1 | | | | | | | | |
| | Sr$_2$MnO$_2$Cu$_{1.82}$Te$_2$ | | | | I4/mmm | a=4.200933 c=19.28303 | 340.304 | | | | |
| | Sr$_2$CoO$_2$Cu$_2$Te$_2$ | | | | I4/mmm | a=4.152337 c=19.54645 | 337.018 | | | | |
| oxygen doped zinc telluride | ZnTe$_{1−x}$O$_x$ | | | | | | | | | | |
| | Ga$_2$O$_{2.95}$Te$_{0.05}$ | | | | | | | | | | |
| Tetragadolinium bis[tetraoxidosilicate(IV)] oxide telluride | Gd$_4$(SiO$_4$)$_2$OTe | 956.78 | | orthorhombic | Pnma | a=12.495 b=10.8683 c=6.8075 Z=4 | 924.5 | 6.874 | colourless | | |
| Niobium iodide oxide telluride | Nb$_4$I$_4$Te$_9$O | | | | | | | | | | |
| Antimony copper oxide telluride | CuSbTeO | | | | | | | | | | |
| dibarium cobalt disilver dioxide ditelluride | Ba$_2$CoO$_2$Ag$_2$Te$_2$ | 836.52 | 2:2 | tetragonal | I4/mmm | | | | | | |
| | Be3Cd4Ge3O12Te | | | | | | | | | | 12449-27-3 |
| SBC-1 | (K$_6$(H$_2$O)$_6$Sb$_{12}$O$_{18}$)$_3$Te$_{36}$ | | | | | tellurium tubes | | | | | |
| RB-CTH-1 | Rb$_{18}$Sb$_{36}$O$_{54}$(SbTe$_3$)$_2$(Te$_2$)$_6$ | | | | | tellurium tubes | | | | | |
| | Ba$_2$TeO | | 1:1 | tetragonal | P4/nmm | a=5.0337, c=9.9437, Z=2 | | | semiconductor | 2.93 | |
| | LaCuOTe | | 1:1 | tetragonal | P4/nmm | a = 4.1775, c = 9.326 | 162.75 | | | 2.31 | |
| | CeCuOTe | | 1:1 | tetragonal | P4/nmm | a = 4.1497, c = 9.309 | 160.30 | | | | |
| | La$_2$O$_2$Te | | 1:2 | tetragonal | I4/mmm | a=4.1231 c=13.096 Z=2 | | 6.525 | | | |
| | Ce$_2$O$_2$Te | | 1:2 | tetragonal | I4/mmm | a=4.0817 c=12.947 Z=2 | | 6.772 | | | |
| | CeOCuTe | | | | | | | 7.39 | | | |
| | Pr$_2$O$_2$Te | | 1:2 | | I4/mmm | a=4.0562 c=12.858 | 211.5 | 6.930 | | | |
| | PrOCuTe | | | | | | | 7.32 | | | |
| | NdCuOTe | | 1:1 | tetragonal | P4/nmm | a = 4.1056, c = 9.332 | 157.30 | | | 2.26 | |
| | Nd$_2$O$_2$Te | | 1:2 | tetragonal | I4/mmm | a=4.0308 c=12.771 | | 7.172 | | | |
| samarium(III) oxide telluride | Sm$_2$TeO$_2$ | | 1:2 | tetragonal | I4/mmm | a=3.9983 c=12.655 | | 7.556 | | | |
| | Eu$_2$TeO$_2$ | | 1:2 | tetragonal | I4/mmm | a=3.9756 c=12.579 Z=2 | | 7.743 | | | |
| | Gd$_2$TeO$_2$ | | 1:2 | tetragonal | I4/mmm | a=3.9620 c=12.532 Z=2 | | 8.004 | | | |
| | Tb$_2$TeO$_2$ | | 1:2 | tetragonal | I4/mmm | a=3.9389 c=12.454 Z=2 | | 8.206 | | | 89800-88-4 |
| | Dy$_2$TeO$_2$ | | 1:2 | tetragonal | I4/mmm | a=3.9234 c=12.403 Z=2 | | 8.430 | | | |
| | Ho$_2$TeO$_2$ | | | orthorhombic | Cmc21 | a=3.8505 b=12.9004 c=4.0521 Z=2 | | 8.075 | | | |
| | Er$_2$TeO$_2$ | | | orthorhombic | Cmc21 | a=3.8263 b=12.8297 c=4.0240 Z=2 | | 8.307 | | | |
| | BiOCuTe | | 1:1 | tetragonal | P4/nmm | a=4.04200 c=9.5234 | | | | | |
| | Bi$_2$O$_2$Te | | 1:2 | tetragonal | I4/mmm | a=3.98025 c=12.7039 | | | semiconductor | 0.23 | |
| thorium oxytelluride | ThOTe | 375.64 | 1:1 | tetragonal | P4/nmm | a=4.1173 c=7.5289 Z=2 | 127.63 | 9.775 | black | 1.45 | |
| | UOTe | | 1:1 | tetragonal | P4/nmm | a=4.004 c=7.491 | | | | | |
| | U$_4$O$_4$Te$_3$ | | 3:4 | tetragonal | I4/mmm | a=4.010 c=27.54 Z=2 | | | | | |
| | U$_2$O$_2$Te | | 1:2 | | | | | | | | |
| neptunium oxide telluride | Np$_2$TeO$_2$ | | 1:2 | Tetragonal | I4/mmm | a=4.003 c=12.73 Z=2 | | | | | |
| | Pu$_2$TeO$_2$ | | 1:2 | tetragonal | I4/mmm | a = 4.008, c = 12.659 Z=2 | 203.4 | 10.58 | | 0.65 | |
| | Am$_2$TeO$_2$ | | | tetragonal | I4/mmm | a=3.994 c=12.72 | | | | | |
| | Cm$_2$TeO$_2$ | | | | I4/mmm | a=3.98 c=12.58 | | | | | |