Tantalum (V) iodide

Crystal structure
	__ Ta 5+ __ I -
General
Surname	Tantalum (V) iodide
other names	Tantalum pentaiodide
Ratio formula	TaI 5
Brief description	black solid
External identifiers / databases
EC number	238-742-4
ECHA InfoCard	100.035.206
PubChem	4204915
Wikidata	Q4202673
properties
Molar mass	815.47 g mol −1
Physical state	firmly
density	5.8 g cm −3 (25 ° C)
Melting point	496 ° C
boiling point	543 ° C
solubility	reacts with water
safety instructions
H and P phrases	H: 314-331
	P: 261-280-305 + 351 + 338-310
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Tantalum (V) iodide is an inorganic chemical compound of tantalum from the group of iodides .

Extraction and presentation

Tantalum (V) iodide can be obtained by reacting tantalum with iodine .

{\ displaystyle \ mathrm {2 \ Ta + 5 \ I_ {2} \ longrightarrow 2 \ TaI_ {5}}}

The representation of tantalum (V) oxide and aluminum (III) iodide is also possible .

{\ displaystyle \ mathrm {Ta_ {2} O_ {5} +5 \ AlI_ {3} \ longrightarrow 2 \ TaI_ {5} +5 \ AlOI}}

properties

Tantalum (V) iodide is a very moisture-sensitive solid that is available in the form of shiny black to bronze-colored flakes or needles. Two modifications are known which differ only in the stacking sequence of the (TaI ₅ ) ₂ dimers. The first modification has an orthorhombic crystal structure with the space group Pnma (no. 62) , the second has a monoclinic crystal structure with the space group P 2 ₁ / c (space group no. 14) with 4 formula units in the unit cell. At 1000 ° C the compound decomposes, releasing iodine. Template: room group / 62 Template: room group / 14

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g data sheet Tantalum (V) iodide, ≥99.9% from Sigma-Aldrich , accessed on May 12, 2017 ( PDF ).
↑ WM Haynes, David R. Lide, Thomas J. Bruno: CRC Handbook of Chemistry and Physics 2012-2013 . CRC Press, 2012, ISBN 978-1-4398-8049-4 , pp. 4–93 ( limited preview in Google Book Search).
↑ ^a ^b Georg Brauer (Ed.) U. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume III, Ferdinand Enke, Stuttgart 1981, ISBN 3-432-87823-0 , p. 1455.
↑ Katja Habermehl: New investigations on halides of niobium and tantalum. Inaugural dissertation, Cologne 2010 (Faculty of Mathematics and Natural Sciences, University of Cologne, urn : nbn: de: hbz: 38-31032 ).
↑ Dale L. Perry: Handbook of Inorganic Compounds . 2nd Edition. Taylor & Francis US, 2011, ISBN 1-4398-1462-7 , pp. 411 ( limited preview in Google Book search).

[Sigma-1] ↑ ^a ^b ^c ^d ^e ^f ^g data sheet Tantalum (V) iodide, ≥99.9% from Sigma-Aldrich , accessed on May 12, 2017 ( PDF ).

[W._M._Haynes,_Ph.D.,_David_R._Lide,_Ph.D.,_Thomas_J._Bruno-2] WM Haynes, David R. Lide, Thomas J. Bruno: CRC Handbook of Chemistry and Physics 2012-2013 . CRC Press, 2012, ISBN 978-1-4398-8049-4 , pp. 4–93 ( limited preview in Google Book Search).

[brauer-3] Georg Brauer (Ed.) U. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume III, Ferdinand Enke, Stuttgart 1981, ISBN 3-432-87823-0 , p. 1455.

[4] Katja Habermehl: New investigations on halides of niobium and tantalum. Inaugural dissertation, Cologne 2010 (Faculty of Mathematics and Natural Sciences, University of Cologne, urn : nbn: de: hbz: 38-31032 ).

[Dale_L._Perry-5] Dale L. Perry: Handbook of Inorganic Compounds . 2nd Edition. Taylor & Francis US, 2011, ISBN 1-4398-1462-7 , pp. 411 ( limited preview in Google Book search).