Potassium titanium oxide
| Crystal structure | |||||||||||||
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| __ K + __ O 2− __ Ti 4+ | |||||||||||||
| General | |||||||||||||
| Surname | Potassium titanium oxide | ||||||||||||
| other names |
Potassium titanate |
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| Ratio formula | K 2 Ti 6 O 13 | ||||||||||||
| Brief description |
colorless solid |
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| properties | |||||||||||||
| Molar mass | 573.39 g mol −1 | ||||||||||||
| Physical state |
firmly |
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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 . | |||||||||||||
Potassium titanium oxide is a chemical compound of potassium from the group of titanates .
Extraction and presentation
Potassium titanium oxide can be obtained by reacting sodium titanium oxide with potassium hydroxide . It is also possible to display it by reacting potassium carbonate or potassium fluoride with titanium dioxide at high temperatures.
properties
Potassium titanium oxide is a colorless solid. It has a monoclinic crystal structure with the space group C 2 / m (space group no. 12) .
use
Potassium titanium oxide can be used as an insulating material and a catalyst support material.
Related links
According to some sources, in addition to K 2 Ti 6 O 13 (K 2 O · 6TiO 2 ), other potassium titanates of the form K 2 O · nTiO 2 with n = 1, 2, 4, 6, 8, 10 and 12 can be represented, of which the Compounds with n = 4 and 6 have the greatest practical importance.
Risk assessment
Potassium titanium oxide was included by the EU in 2014 in accordance with Regulation (EC) No. 1907/2006 (REACH) in the context of substance evaluation in the Community's ongoing action plan ( CoRAP ). The effects of the substance on human health and the environment are re-evaluated and, if necessary, follow-up measures are initiated. The causes of the uptake of potassium titanium oxide were concerns about exposure of workers and the suspected dangers of carcinogenic properties. The re-evaluation has been running since 2017 and is carried out by France .
Individual evidence
- ^ A b c S. Andersson, AD Wadsley: The crystal structure of Na 2 Ti 3 O 7 . In: Acta Crystallographica . tape 14 , no. 12 , December 10, 1961, ISSN 0365-110X , p. 1245–1249 , here p. 1245 , doi : 10.1107 / S0365110X61003636 .
- ↑ Entry on potassium titanium oxide in the GESTIS substance database of the IFA , accessed on December 30, 2019(JavaScript required) .
- ↑ Entry on potassium titanium oxide (K2Ti6O13) in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on December 30, 2019. Manufacturers or distributors can expand the harmonized classification and labeling .
- ↑ BL Wang, Q. Chen, RH Wang, L. -M. Peng: Synthesis and characterization of K 2 Ti 6 O 13 nanowires . In: Chemical Physics Letters . tape 376 , no. 5-6 , July 31, 2003, pp. 726-731 , here p. 726 , doi : 10.1016 / S0009-2614 (03) 01068-6 .
- ↑ GL Li, GH Wang, JM Hong: Synthesis and characterization of K 2 Ti 6 O 13 whiskers with diameter on nanometer scale . In: Journal of Materials Science Letters . tape 18 , no. 22 , November 1, 1999, p. 1865–1867 , here p. 1865 , doi : 10.1023 / A: 1006619910915 .
- ↑ Hilde Cid-Dresdner, MJ Buerger: The crystal structure of potassium hexatitanate K 2 Ti 6 O 13 . In: Journal of Crystallography - Crystalline Materials . tape 117 , no. 1-6 , December 1962, pp. 411-430 , doi : 10.1524 / zkri.1962.117.16.411 .
- ↑ a b Qiuju Sun, Wu Li: Inorganic whisker Reinforced Polymer Composites Synthesis, Properties and Applications . CRC Press, 2015, ISBN 978-1-4987-0068-9 , pp. 99 ( limited preview in Google Book search).
- ↑ Community rolling action plan ( CoRAP ) of the European Chemicals Agency (ECHA): Potassium titanium oxide (K2Ti6O13) , accessed on March 26, 2019.