Scandium iodide

Crystal structure
	__ Sc 3+ __ I -
General
Surname	Scandium iodide
other names	Scandium (III) iodide; Scandium triiodide;
Ratio formula	ScI 3
Brief description	yellow solid
External identifiers / databases
EC number	238-469-0
ECHA InfoCard	100.034.956
PubChem	84464
Wikidata	Q2228916
properties
Molar mass	425.67 g mol −1
Physical state	firmly
density	4.65 g cm −3
Melting point	920 ° C
safety instructions
H and P phrases	H: 315-319-335-360
	P: 201-261-305 + 351 + 338-308 + 313
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Scandium iodide is an inorganic chemical compound of scandium from the group of iodides .

Extraction and presentation

Scandium iodide can be obtained directly by reacting scandium with iodine .

{\ displaystyle \ mathrm {2 \ Sc + 3 \ I_ {2} \ longrightarrow 2 \ ScI_ {3}}}

properties

Scandium iodide is a moisture-sensitive yellow solid. It has a trigonal crystal system similar to that of bismuth triiodide with the space group R 3 (space group no. 148) . Template: room group / 148

use

Scandium iodide is used as an additive for special mercury vapor lamps that reproduce the spectrum of sunlight well. The connection is only created in the lamps. About 5 mg of scandium are added per lamp. In automobile lighting (mercury-free Xe lamps) scandium iodide has been used since at least 1994 in order to be able to implement the EU directive 2000/53 / EC in the long term. It can also be used as a mild Lewis acid in organic synthesis.

Individual evidence

^ ^A ^b ^c Jean D'Ans, Ellen Lax: Pocket book for chemists and physicists . Springer DE, 1997, ISBN 3-540-60035-3 , pp. 718 ( limited preview in Google Book search).
↑ ^a ^b ^c ^d data sheet Scandium (III) iodide, anhydrous, powder, 99.999% trace metals basis from Sigma-Aldrich , accessed on November 4, 2012 ( PDF ).
↑ Web elements: Scandium | chemical reaction data .
^ Catherine E. Housecroft, AG Sharpe: Inorganic Chemistry . Pearson Education, 2005, ISBN 0-13-039913-2 , pp. 598 ( limited preview in Google Book search).
^ François Cardarelli: Materials Handbook: A Concise Desktop Reference . Springer, 2008, ISBN 1-84628-668-9 , pp. 434 ( limited preview in Google Book search).
↑ CK Gupta, N. Krishnamurthy: Extractive Metallurgy of Rare Earths . CRC Press, 2004, ISBN 0-415-33340-7 , pp. 48 ( limited preview in Google Book search).
↑ Per Enghag: Encyclopedia of the Elements: Technical Data - History - Processing - Applications . John Wiley & Sons, 2008, ISBN 3-527-61234-3 , pp. 477 ( limited preview in Google Book search).
↑ John A. Joule, Keith Mills: Heterocyclic Chemistry . John Wiley & Sons, 2010, ISBN 0-470-68597-2 , pp. 380 ( limited preview in Google Book search).

[Jean_D'Ans,_Ellen_Lax-1] A ^b ^c Jean D'Ans, Ellen Lax: Pocket book for chemists and physicists . Springer DE, 1997, ISBN 3-540-60035-3 , pp. 718 ( limited preview in Google Book search).

[Sigma-2] ta sheet Scandium (III) iodide, anhydrous, powder, 99.999% trace metals basis from Sigma-Aldrich , accessed on November 4, 2012 ( PDF ).

[Webelements-3] Web elements: Scandium | chemical reaction data .

[Catherine_E._Housecroft,_A._G._Sharpe-4] Catherine E. Housecroft, AG Sharpe: Inorganic Chemistry . Pearson Education, 2005, ISBN 0-13-039913-2 , pp. 598 ( limited preview in Google Book search).

[François_Cardarelli-5] François Cardarelli: Materials Handbook: A Concise Desktop Reference . Springer, 2008, ISBN 1-84628-668-9 , pp. 434 ( limited preview in Google Book search).

[C.K._Gupta,_N._Krishnamurthy-6] CK Gupta, N. Krishnamurthy: Extractive Metallurgy of Rare Earths . CRC Press, 2004, ISBN 0-415-33340-7 , pp. 48 ( limited preview in Google Book search).

[Per_Enghag-7] Per Enghag: Encyclopedia of the Elements: Technical Data - History - Processing - Applications . John Wiley & Sons, 2008, ISBN 3-527-61234-3 , pp. 477 ( limited preview in Google Book search).

[John_A._Joule,_Keith_Mills-8] John A. Joule, Keith Mills: Heterocyclic Chemistry . John Wiley & Sons, 2010, ISBN 0-470-68597-2 , pp. 380 ( limited preview in Google Book search).