Magnesium titanium oxide
Crystal structure | |||||||||||||
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Mg 2+ : __ / Ti 4+ : __ / O 2− : __ | |||||||||||||
Crystal system |
rhombohedral |
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Space group |
R 3 (No. 148) |
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Lattice parameters |
a = 5.05478 Å, c = 13.8992 Å, Z = 6 |
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General | |||||||||||||
Surname | Magnesium titanium oxide | ||||||||||||
other names |
Magnesium titanate |
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Ratio formula | MgTiO 3 | ||||||||||||
Brief description |
white odorless solid |
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External identifiers / databases | |||||||||||||
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properties | |||||||||||||
Molar mass | 120.21 g mol −1 | ||||||||||||
Physical state |
firmly |
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density |
3.36 g cm −3 |
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Melting point |
1610 ° C |
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solubility |
practically insoluble in water |
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safety instructions | |||||||||||||
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As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
Magnesium titanium oxide is an inorganic chemical compound of magnesium from the group of titanates .
Occurrence
Magnesium titanium oxide occurs naturally in the form of the mineral geikielite .
Extraction and presentation
The magnesium titanates MgTiO 3 , Mg 2 TiO 4 and MgTi 2 O 5 can be synthesized using a wet chemical peroxide route at low temperatures. The first step in production is the precipitation of peroxo precursors of a certain stoichiometry, which can be converted into the corresponding titanates by thermal decomposition.
The compound can also be prepared by reacting iron titanate with magnesium oxide and carbon .
properties
Magnesium titanium oxide is a white odorless solid that is practically insoluble in water. It has an ilmenite crystal structure with the space group R 3 (space group no. 148) and the lattice constants a = 5.05478 Å and c = 13.8992 Å. There are six formula units in a unit cell.
use
Magnesium titanium oxide is used as an intermediate in the manufacture of other chemical compounds and in chemical research. It is also used as a dielectric in capacitors, resonators and filters for communication electronics.
Individual evidence
- ↑ a b c d e f g h i data sheet Magnesium titanium oxide, 99% (metals basis) from AlfaAesar, accessed on April 13, 2019 ( PDF )(JavaScript required) .
- ^ Geikielite: Mineral information, data and localities. Geikielite: Mineral information, data and localities. , accessed April 13, 2019
- ^ Richard C. Ropp: Encyclopedia of the Alkaline Earth Compounds . Newnes, 2012, ISBN 0-444-59553-8 , pp. 660 ( limited preview in Google Book search).
- ↑ Chen, Chao, Ti-Chang Sun, Jue Kou, Xiao-Ping Wang, and Yong-Qiang Zhao. "Feasibility study on preparation of magnesium titanate in carbonthermic reduction of vanadium titanomagnetite concentrates". Physicochemical Problems of Mineral Processing 55 no.2 (2019): 417-425. doi : 10.5277 / ppmp18151 .
- ↑ BA Wechsler, RB Von Dreele: Structure refinements of Mg2TiO4, MgTiO3 and MgTi2O5 by time-of-flight neutron powder diffraction. 45, 1989, p. 542, doi : 10.1107 / S010876818900786X .
- ^ Bill Lee, Rainer Gadow, Vojislav Mitic: Proceedings of the IV Advanced Ceramics and Applications Conference . Springer, 2017, ISBN 978-94-6239-213-7 , pp. 147 ( limited preview in Google Book search).
- ↑ Takuro Sato, Ryoichi Miyamoto, Atsushi Fukasawa: Deviation of Dielectric Properties in Magnesium Titanate Ceramics. In: Japanese Journal of Applied Physics. 20, 1981, p. 151, doi : 10.7567 / JJAPS.20S4.151 .