Technetium (VII) oxide

Crystal structure
	__ Tc 7+ __ O 2−
Crystal system	orthorhombic
Space group	Pbca (No. 61)
Lattice parameters	a = 1375.6 pm, b = 743.9 pm, c = 561.7 pm
General
Surname	Technetium (VII) oxide
Ratio formula	Tc 2 O 7
Brief description	light yellow solid
External identifiers / databases
PubChem	22227441
Wikidata	Q2284773
properties
Molar mass	309.8 g mol −1
Physical state	firmly
density	3.5 g cm −3
Melting point	119.5 ° C
boiling point	310.6 ° C
solubility	soluble in water
Hazard and safety information
	; Radioactive
GHS hazard labeling ; no classification available
GHS hazard labeling ; no classification available
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Technetium (VII) oxide is an inorganic chemical compound of technetium from the group of oxides .

presentation

Technetium (VII) oxide can be obtained by reacting technetium with oxygen at 450–500 ° C.

{\ displaystyle {\ ce {4 Tc + 7 O2 -> Tc2O7}}}

It is also produced during the disproportionation of technetium (VI) oxide .

{\ displaystyle {\ ce {3 TcO3 -> Tc2O7 + TcO2}}}

properties

Technetium (VII) oxide is a light yellow, very hygroscopic solid in the form of needle-shaped crystals. In the solid state it has a molecular structure and an orthorhombic crystal structure with the space group Pbca (space group no. 61) and the lattice parameters a = 1375.6 pm, b = 743.9 pm and c = 561.7 pm. It is soluble in water with the formation of pertechnetic acid HTcO ₄ , the concentrated solution being pink in color. Template: room group / 61

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g ^h 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. 1598.
↑ The hazards emanating from radioactivity do not belong to the properties to be classified according to the GHS labeling. With regard to other hazards, this substance has either not yet been classified or a reliable and citable source has not yet been found.
↑ Hans Peter Latscha, Martin Mutz: Chemistry of the elements . Springer DE, 2011, ISBN 978-3-642-16915-1 , pp. 238 ( limited preview in Google Book search).
↑ Dr. BK Sharma: Nuclear and Radiation Chemistry . 7th edition. 2001, ISBN 81-85842-63-9 , pp. 140 ( limited preview in Google Book search).

[brauer-1] ↑ ^a ^b ^c ^d ^e ^f ^g ^h 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. 1598.

[NV-2] The hazards emanating from radioactivity do not belong to the properties to be classified according to the GHS labeling. With regard to other hazards, this substance has either not yet been classified or a reliable and citable source has not yet been found.

[Hans_Peter_Latscha,_Martin_Mutz-3] Hans Peter Latscha, Martin Mutz: Chemistry of the elements . Springer DE, 2011, ISBN 978-3-642-16915-1 , pp. 238 ( limited preview in Google Book search).

[Dr._B._K._Sharma-4] Dr. BK Sharma: Nuclear and Radiation Chemistry . 7th edition. 2001, ISBN 81-85842-63-9 , pp. 140 ( limited preview in Google Book search).