A tellurite tellurate is a chemical compound or salt that contains tellurite and tellurate anions (TeO32- and TeO42-). These are mixed anion compounds. Some have third anions.
A tellurite tellurate compound may also be called a tellurate tellurite.
One way to produce a tellurite tellurate compound is by heating oxides together. [1]
Monoclinic and orthorhombic dominate crystal structures of the tellurite tellurates. [2] Most compounds are transparent from near ultraviolet to the near infrared. Te-O bonds cause absorption lines in infrared.
Related to these are the selenate selenites and sulfate sulfites by varying the chalcogen.
name | formula | ratio TeO3:TeO4 | mw | system | space group | unit cell Å | volume | density | optical | references |
---|---|---|---|---|---|---|---|---|---|---|
NH4Te2O5(OH) | 1:1 | orthorhombic | Pnma | a=7.340 b=5.546 c=13.164 Z=4 | 535.9 | 4.50 | [3] | |||
K2Te4O12 | 1:3 | monoclinic | C2/m | a=12.360 b=7.248 c=11.967 β =105.68 Z=4 | 1032.2 | 5.03 | [1] [4] | |||
K4[Te56+Te34+]O23 | 3:5 | orthorhombic | Pna21 | a = 19.793, b = 14.664, c = 7.292, Z = 4 | [5] | |||||
Carlfriesite | Ca[Te4+2Te6+O8] | 2:1 | monoclinic | C2/c | a=12.576 b=5.662 c=9.884 β=115.56 | [2] | ||||
K4V6[Te24+Te6+]O24 | 2:1 | trigonal | R3c | a = 9.7075, c = 42.701, Z = 6 | 3484.9 | [6] | ||||
Co2+6(Te6+O6)(Te4+O3)2Cl2 | 2:1 | tetragonal | P42/mbc | a = 8.59 c = 5.91 | [2] | |||||
Rb4[Te56+Te34+]O23 | 3:5 | orthorhombic | Pna21 | a = 19.573, b = 14.448, c = 7.273, Z = 4 | [5] | |||||
Rb4V6[Te24+Te6+]O24 | 2:1 | trigonal | R3c | a = 9.8399, c = 43.012, Z = 6 | 3606.6 | [6] | ||||
Sr[Te4+2Te6+O8] | 2:1 | tetragonal | P42/m | a=6.8321 c=6.7605 | [2] | |||||
SrCuTe2O7 | 1:1 | orthorhombic | Pbcm | a = 7.1464, b = 15.061, c = 5.4380, Z = 4 | 585.3 | [7] | ||||
NaYTe2O7 | 1:1 | 479.10 | monoclinic | P21/n | a=6.7527 b=7.5077 c=11.8867 β =99.935 Z=4 | 593.59 | 5.361 | [8] | ||
RbTe1·25Mo0·75O6 | a=10.469 | [9] | ||||||||
(Ag,Na)2Te4O15 x=0.4 | 2:2 | monoclinic | P21/c | a = 6.333, b = 24.681, c = 7.308, β = 110.84° Z = 4 | [1] | |||||
Ag2[Te4+Te6+O6] | 1:1 | monoclinic | P21/m | a=5.4562 b=7.4009 c=6.9122 β=101.237 | [2] | |||||
Ag2[Te4+2Te6+2O11] | 2:2 | triclinic | P1 | a=7.287 b=7.388 c=9.686 α=95.67 β=94.10 γ=119.40 | [2] | |||||
Cd2Te4+Te6+O7 | 1:1 | monoclinic | P21/c | a=9.3039 b=7.3196 c=13.2479 β=122.914 | [2] | |||||
Cs2Te4+Te36+O12 | 1:3 | rhombohedral | R3m | a=7.2921 c=18.332 | [10] | |||||
CsTe2O6–x | 1:1 | cubic | [10] | |||||||
CsTe2O6–x | 1:1 | orthorhombic | [10] | |||||||
BaTe2O6 | 1:1 | orthorhombic | Cmcm | a=5.569 b=12,796 c=7.320 Z=4 | 6.19 | [2] [11] | ||||
BaMgTe2O7 | 1:1 | orthorhombic | Ama2 | a = 5.558, b = 15.215, c = 7.307 Z = 4 | 617.9 | SHG 5 × KDP | [12] | |||
CsTe1·13Mo0·864O6 | a=10.643 | [9] | ||||||||
BaCoTeO3TeO4 | 1:1 | orthorhombic | Ama2 | [13] | ||||||
BaCuTeO3TeO4 | 1:1 | orthorhombic | Ama2 | a = 5.4869, b =15.412, c = 7.2066, Z = 4. | 609.42 | [14] | ||||
BaZnTe2O7 | orthorhombic | Ama2 | a = 5.5498, b = 15.316, c = 7.3098, Z = 4 | 621.34 | SHG 5 × KDP | [12] | ||||
CeV3Te3O15(OH)3·2H2O | 995.74 | hexagonal | P63/mmc | a=12.166 c=12.537 Z=4 | 1606.9 | 4.116 | dark red | [15] | ||
PrV3Te3O15(OH)3·2H2O | 996.53 | hexagonal | P63/mmc | a=12.1147 c=12.4949 Z=4 | 1588.1 | 4.168 | dark red | [15] | ||
NdV3Te3O15(OH)3·H2O | 983.86 | hexagonal | P63/mmc | a=12.1075 c=12.4572 Z=4 | 1581.5 | 4.132 | dark red | [15] | ||
SmV3Te3O15(OH)3·H2O | 989.97 | hexagonal | P63/mmc | a=12.1068 c=12.4509 Z=4 | 1580.5 | 4.160 | dark red | [15] | ||
EuV3Te3O15(OH)3·H2O | 991.58 | hexagonal | P63/mmc | a=12.0731 c=12.3674 Z=4 | 1561.2 | 4.219 | dark red | [15] | ||
GdV3Te3O15(OH)3·H2O | 996.87 | hexagonal | P63/mmc | a=12.0745 c=12.3701 Z=4 | 1561.9 | 4.239 | dark red | [15] | ||
RbTe1·5W0·5O6 | a=10.462 | [9] | ||||||||
CsTe1·625W0·375O6 | a=10.543 | [9] | ||||||||
α-Hg2Te2O7 | 1:1 | monoclinic | C2/c | a=12.910 b=7.407 c=13.256 β =112.044 Z=8 | [16] | |||||
β-Hg2Te2O7 | 1:1 | orthorhombic | Aea2 | a=7.441, b=23.713 ,c=13.522, Z=16 | [16] | |||||
PbCuTe2O7 | 1:1 | orthorhombic | Pbcm | a = 7.2033, b = 15.047, c = 5.4691, Z = 4 | 592.78 | [7] | ||||
Bi[(Bi3+Te4+)Te6+O8] | [2] | |||||||||
Tellurium is a chemical element with the symbol Te and atomic number 52. It is a brittle, mildly toxic, rare, silver-white metalloid. Tellurium is chemically related to selenium and sulfur, all three of which are chalcogens. It is occasionally found in native form as elemental crystals. Tellurium is far more common in the Universe as a whole than on Earth. Its extreme rarity in the Earth's crust, comparable to that of platinum, is due partly to its formation of a volatile hydride that caused tellurium to be lost to space as a gas during the hot nebular formation of Earth.
Tellurium dioxide (TeO2) is a solid oxide of tellurium. It is encountered in two different forms, the yellow orthorhombic mineral tellurite, β-TeO2, and the synthetic, colourless tetragonal (paratellurite), α-TeO2. Most of the information regarding reaction chemistry has been obtained in studies involving paratellurite, α-TeO2.
In chemistry tellurate is a compound containing an oxyanion of tellurium where tellurium has an oxidation number of +6. In the naming of inorganic compounds it is a suffix that indicates a polyatomic anion with a central tellurium atom.
Telluric acid is a chemical compound with the formula Te(OH)6, often written as H6TeO6. It is a white crystalline solid made up of octahedral Te(OH)6 molecules which persist in aqueous solution. In the solid state, there are two forms, rhombohedral and monoclinic, and both contain octahedral Te(OH)6 molecules, containing one hexavalent tellurium (Te) atom in the +6 oxidation state, attached to six hydroxyl (–OH) groups, thus, it can be called tellurium(VI) hydroxide. Telluric acid is a weak acid which is dibasic, forming tellurate salts with strong bases and hydrogen tellurate salts with weaker bases or upon hydrolysis of tellurates in water. It is used as tellurium-source in the synthesis of oxidation catalysts.
Uranium(IV) iodide, also known as uranium tetraiodide, is an inorganic chemical compound. It is a salt of uranium in oxidation state +4 and iodine.
The selenide iodides are chemical compounds that contain both selenide ions (Se2−) and iodide ions (I−) and one or metal atoms. They are in the class of mixed anion compounds or chalcogenide halides.
The telluride bromides are chemical compounds that contain both telluride ions (Te2−) and bromide ions (Br−). They are in the class of mixed anion compounds or chalcogenide halides.
The telluride oxides or oxytellurides are double salts that contain both telluride and oxide anions. They are in the class of mixed anion compounds.
The telluride iodides are chemical compounds that contain both telluride ions (Te2−) and iodide ions (I−). They are in the class of mixed anion compounds or chalcogenide halides.
A sulfite sulfate is a chemical compound that contains both sulfite and sulfate anions [SO3]2− [SO4]2−. These compounds were discovered in the 1980s as calcium and rare earth element salts. Minerals in this class were later discovered. Minerals may have sulfite as an essential component, or have it substituted for another anion as in alloriite. The related ions [O3SOSO2]2− and [(O2SO)2SO2]2− may be produced in a reaction between sulfur dioxide and sulfate and exist in the solid form as tetramethyl ammonium salts. They have a significant partial pressure of sulfur dioxide.
A selenite fluoride is a chemical compound or salt that contains fluoride and selenite anions. These are mixed anion compounds. Some have third anions, including nitrate, molybdate, oxalate, selenate, silicate and tellurate.
The borophosphates are mixed anion compounds containing borate and phosphate anions, which may be joined together by a common oxygen atom. Compounds that contain water or hydroxy groups can also be included in the class of compounds.
The borotellurates are heteropoly anion compounds which have tellurate groups attached to boron atoms. The ratio of tellurate to borate reflects the degree of condensation. In [TeO4(BO3)2]8- the anions are linked into a chain. In [TeO2(BO3)4]10− the structure is zero dimensional with isolated anions. These arrangements of oxygen around boron and tellurium can have forms resembling silicates. The first borotellurates to be discovered were the mixed sodium rare earth compounds in 2015.
The boroselenates are chemical compounds containing interlinked borate and selenate groups sharing oxygen atoms. Both selenate and borate groups are tetrahedral in shape. They have similar structures to borosulfates and borophosphates. The borotellurates' tellurium atom is much bigger, so TeO6 octahedra appear instead.
The boroselenites are heteropoly anion chemical compounds containing selenite and borate groups linked by common oxygen atoms. They are not to be confused with the boroselenates with have a higher oxidation state for selenium, and extra oxygen. If selenium is replaced by sulfur, it would be a borosulfite. Boroselenites are distinct from selenoborates in which selenium replaces oxygen in borate, or perselenoborates which contain Se-Se bonds as well as Se-B bonds. The metal boroselenites were only discovered in 2012.
Marinella Mazzanti is an Italian inorganic chemist specialized in coordination chemistry. She is a professor at EPFL and the head of the group of Coordination Chemistry at EPFL's School of Basic Sciences.
Sulfidostannates, or thiostannates are chemical compounds containing anions composed of tin linked with sulfur. They can be considered as stannates with sulfur substituting for oxygen. Related compounds include the thiosilicates, and thiogermannates, and by varying the chalcogen: selenostannates, and tellurostannates. Oxothiostannates have oxygen in addition to sulfur. Thiostannates can be classed as chalcogenidometalates, thiometallates, chalcogenidotetrelates, thiotetrelates, and chalcogenidostannates. Tin is almost always in the +4 oxidation state in thiostannates, although a couple of mixed sulfides in the +2 state are known,
A tellurite fluoride is a mixed anion compound containing tellurite and fluoride ions. They have also been called oxyfluorotellurate(IV) where IV is the oxidation state of tellurium in tellurite.
A selenate selenite is a chemical compound or salt that contains selenite and selenate anions (SeO32- and SeO42-). These are mixed anion compounds. Some have third anions.
Sulfidogermanates or thiogermanates are chemical compounds containing anions with sulfur atoms bound to germanium. They are in the class of chalcogenidotetrelates. Related compounds include thiosilicates, thiostannates, selenidogermanates, telluridogermanates and selenidostannates.