Actinium (III) oxide

Crystal structure
	__ Ac 3+ __ O 2−
Crystal system	trigonal
Space group	P 3 m 1 (No. 164)
Lattice parameters	a = 408 pm ; c = 630 pm
General
Surname	Actinium (III) oxide
other names	Diactinium trioxide; Actinium sesquioxide;
Ratio formula	Ac 2 O 3
Brief description	white solid
External identifiers / databases
EC number	234-417-6
ECHA InfoCard	100.031.275
PubChem	21946271
Wikidata	Q3480588
properties
Molar mass	502.00 g mol −1
Physical state	firmly
density	9.19 g cm −3
solubility	almost insoluble 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 .

Actinium (III) oxide is an inorganic chemical compound of actinium from the group of oxides .

Extraction and presentation

Actinium (III) oxide can be obtained by reacting actinium (III) oxalate precipitated from nitric acid solution in an oxygen atmosphere at 1100 ° C.

{\ displaystyle \ mathrm {Ac_ {2} (C_ {2} O_ {4}) _ {3} \ longrightarrow Ac_ {2} O_ {3} +3 \ CO_ {2} +3 \ CO}}

properties

Actinium (III) oxide is a white solid. It has a trigonal crystal structure of the lanthanum oxide type with the space group P 3 m 1 (space group no. 164) and the lattice parameters a = 408 pm, c = 630 pm. Template: room group / 164

safety instructions

Classifications according to the GHS regulation are not available because they only include chemical hazard, which plays a completely subordinate role compared to the hazards based on radioactivity . The latter also only applies if the amount of substance involved is relevant.

Individual evidence

↑ ^a ^b W: H: Zachariasen: Crystal chemical studies of the 5f series of elements. XII. New compounds representing known structure types . In: Acta Crystallographica , 1949 , 2 , pp. 388-390 doi : 10.1107 / S0365110X49001016
↑ ^a ^b ^c Georg Brauer , with the assistance of Marianne Baudler a . a. (Ed.): Handbook of Preparative Inorganic Chemistry . 3rd, revised edition. tape I . Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , pp. 1127 .
^ ^A ^b Dale L. Perry: Handbook of Inorganic Compounds, Second Edition . CRC Press, 2011, pp. 2 ( limited preview in Google Book search).
↑ 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.

[Zachariasen-1] W: H: Zachariasen: Crystal chemical studies of the 5f series of elements. XII. New compounds representing known structure types . In: Acta Crystallographica , 1949 , 2 , pp. 388-390 doi : 10.1107 / S0365110X49001016

[brauer-2] Georg Brauer , with the assistance of Marianne Baudler a . a. (Ed.): Handbook of Preparative Inorganic Chemistry . 3rd, revised edition. tape I . Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , pp. 1127 .

[Dale_L._Perry-3] A ^b Dale L. Perry: Handbook of Inorganic Compounds, Second Edition . CRC Press, 2011, pp. 2 ( limited preview in Google Book search).

[NV-4] 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.