Sodium arsenide

Crystal structure
	__ Na + __ As 3−
General
Surname	Sodium arsenide
other names	Trisodium arsenide
Ratio formula	AsNa 3
Brief description	brown purple solid
External identifiers / databases
EC number	234-952-5
ECHA InfoCard	100,031,762
PubChem	82879
Wikidata	Q18056539
properties
Molar mass	143.89 g mol −1
Physical state	firmly
density	2.36 g cm −3
safety instructions
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 .

Sodium arsenide is an inorganic chemical compound of sodium from the group of arsenides . In addition to Na ₃ As, other sodium arsenides such as NaAs are known.

Extraction and presentation

Sodium arsenide can be obtained by reacting sodium vapor with arsenic at 180 to 200 ° C.

{\ displaystyle \ mathrm {3 \ Na + As \ longrightarrow Na_ {3} As}}

properties

Sodium arsenide is a brown-purple solid. It has a hexagonal crystal structure with the space group P 6 ₃ / mmc (space group No. 194) and the lattice parameters a = 4.874 Å and c = 8.515 Å. The structure contains two crystallographically different Na atoms; one is trigonal-planar surrounded by As atoms, the other tetrahedral . Other literature sources report a structure of the anti- tysonite type with the P 6 ₃cm (No. 185) . Arsenic hydrogen is formed on contact with water . Template: room group / 194 Template: room group / 185

{\ displaystyle \ mathrm {Na_ {3} As + 3 \ H_ {2} O \ longrightarrow 3 \ NaOH + H_ {3} As}}

Individual evidence

↑ ^a ^b ^c J. D. Smith: The Chemistry of Arsenic, Antimony and Bismuth: Pergamon Texts in Inorganic Chemistry . Elsevier, 2013, ISBN 978-1-4831-8754-9 , pp. 559 ( limited preview in Google Book search).
↑ Norbert Auner, Wolfgang A. Herrmann, Uwe Klingebiel: Synthetic Methods of Organometallic and Inorganic Chemistry, Volume 2, 1996: Volume 2: Groups 1,2, 13 and 14 . Georg Thieme Verlag, 2014, ISBN 3-13-179171-3 , p. 40 ( limited preview in Google Book search).
↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
^ J. Songster, AD Pelton: The As-Na (arsenic-sodium) system. In: Journal of Phase Equilibria. 14, 1993, p. 240, doi : 10.1007 / BF02667819 .
↑ William A. Hart, OF Beumel, Thomas P. Whaley: The Chemistry of Lithium, Sodium, Potassium, Rubidium, Cesium and Francium: Pergamon Texts in Inorganic Chemistry . Elsevier, 2013, ISBN 978-1-4831-8757-0 , pp. 439 ( limited preview in Google Book search).
↑ HJ Beister, K. Syassen, J. Klein: phase transition of Na ₃ pressure As under. In: Journal of Nature Research B . 45, 1990, pp. 1388-1392 ( PDF , free full text).
↑ Bodie Douglas, Shi-Ming Ho: Structure and Chemistry of Crystalline Solids: . Springer Science & Business Media, 2007, ISBN 978-0-387-36687-6 , pp. 323 ( limited preview in Google Book search).
↑ Amit Arora: Textbook Of Inorganic Chemistry: . Discovery Publishing House, 2005, ISBN 978-81-8356-013-9 , pp. 521 ( limited preview in Google Book search).
↑ Peter Hafner, Klaus-Jürgen Range: Na3As revisited: high-pressure synthesis of single crystals and structure refinement. In: Journal of Alloys and Compounds. 216, 1994, p. 7, doi : 10.1016 / 0925-8388 (94) 91033-2 .

[J._D._Smith-1] J. D. Smith: The Chemistry of Arsenic, Antimony and Bismuth: Pergamon Texts in Inorganic Chemistry . Elsevier, 2013, ISBN 978-1-4831-8754-9 , pp. 559 ( limited preview in Google Book search).

[Norbert_Auner,_Wolfgang_A._Herrmann,_Uwe_Klingebiel-2] Norbert Auner, Wolfgang A. Herrmann, Uwe Klingebiel: Synthetic Methods of Organometallic and Inorganic Chemistry, Volume 2, 1996: Volume 2: Groups 1,2, 13 and 14 . Georg Thieme Verlag, 2014, ISBN 3-13-179171-3 , p. 40 ( limited preview in Google Book search).

[NV-3] This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.

[DOI10.1007/BF02667819-4] J. Songster, AD Pelton: The As-Na (arsenic-sodium) system. In: Journal of Phase Equilibria. 14, 1993, p. 240, doi : 10.1007 / BF02667819 .

[William_A._Hart,_O._F._Beumel,_Thomas_P._Whaley-5] William A. Hart, OF Beumel, Thomas P. Whaley: The Chemistry of Lithium, Sodium, Potassium, Rubidium, Cesium and Francium: Pergamon Texts in Inorganic Chemistry . Elsevier, 2013, ISBN 978-1-4831-8757-0 , pp. 439 ( limited preview in Google Book search).

[6] HJ Beister, K. Syassen, J. Klein: phase transition of Na ₃ pressure As under. In: Journal of Nature Research B . 45, 1990, pp. 1388-1392 ( PDF , free full text).

[Bodie_Douglas,_Shi-Ming_Ho-7] Bodie Douglas, Shi-Ming Ho: Structure and Chemistry of Crystalline Solids: . Springer Science & Business Media, 2007, ISBN 978-0-387-36687-6 , pp. 323 ( limited preview in Google Book search).

[Amit_Arora-8] Amit Arora: Textbook Of Inorganic Chemistry: . Discovery Publishing House, 2005, ISBN 978-81-8356-013-9 , pp. 521 ( limited preview in Google Book search).

[DOI10.1016/0925-8388(94)91033-2-9] Peter Hafner, Klaus-Jürgen Range: Na3As revisited: high-pressure synthesis of single crystals and structure refinement. In: Journal of Alloys and Compounds. 216, 1994, p. 7, doi : 10.1016 / 0925-8388 (94) 91033-2 .