Magnesium titanium oxide

Crystal structure
Mg 2+ : __   /   Ti 4+ : __   /   O 2− : __
Crystal system	rhombohedral
Space group	R 3 (No. 148)
Lattice parameters	a = 5.05478 Å, c = 13.8992 Å, Z = 6
General
Surname	Magnesium titanium oxide
other names	Magnesium titanate
Ratio formula	MgTiO 3
Brief description	white odorless solid
External identifiers / databases
CAS number 12032-30-3 PubChem 6096974 ChemSpider 452384 Wikidata Q18211813
properties
Molar mass	120.21 g mol −1
Physical state	firmly
density	3.36 g cm −3
Melting point	1610 ° C
solubility	practically insoluble in water
safety instructions
GHS labeling of hazardous substances no GHS pictograms H and P phrases H: no H-phrases P: no P-phrases
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 .

${\displaystyle {\ce {FeTiO3 + MgO + C -> MgTiO3 + Fe + CO}}}$

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

1. ↑ ^{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) .
2. ^ Geikielite: Mineral information, data and localities. Geikielite: Mineral information, data and localities. , accessed April 13, 2019
3. ^ Richard C. Ropp: Encyclopedia of the Alkaline Earth Compounds . Newnes, 2012, ISBN 0-444-59553-8 , pp. 660 ( limited preview in Google Book search).
4. ↑ 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 .
5. ↑ 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 .
6. ^ 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).
7. ↑ 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 .