Silver arsenate

Crystal structure
	__ Ag + __ As 5+ __ O 2−
Crystal system	cubic
Space group	P 4 3 n (No. 218)
Lattice parameters	a = 6.1391 Å
General
Surname	Silver arsenate
Ratio formula	Ag 3 AsO 4
Brief description	red powder
External identifiers / databases
EC number	236-841-7
ECHA InfoCard	100,033,477
PubChem	166835
ChemSpider	145967
Wikidata	Q4069947
properties
Molar mass	456.52 g mol −1
Physical state	firmly
Melting point	Decomposition in the heat
solubility	practically insoluble in water; soluble in ammonia ;
safety instructions
H and P phrases	H: 301-331-350-410
	P: 264-280-301 + 310-304 + 340-311
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Silver arsenate , Ag ₃ AsO ₄ is a chemical compound between silver and arsenic acid .

Manufacturing

The reaction of arsenic acid with silver nitrate and ammonia can produce silver arsenate and ammonium nitrate .

${\ displaystyle {\ ce {H3AsO4 + 3 AgNO3 + 3 NH3 -> Ag3AsO4 + 3 NH4NO3}}}$

properties

Silver arsenate is a red powder. It is not flammable and sensitive to light. The compound crystallizes in the cubic space group P 4 3 n (space group no. 218) with the lattice constant a = 6.1391 Å, the structure is isomorphic to silver phosphate . Template: room group / 218

safety instructions

The salt is toxic if swallowed or inhaled . It can also cause cancer .

In the event of a fire, arsenic (III) oxide can be produced.

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g ^h Entry on silver arsenate in the GESTIS substance database of the IFA , accessed on January 8, 2020 (JavaScript required)
^ ^A ^b Heinrich Biltz , Wilhelm Klemm (Ed.), Werner Fischer (Ed.): Experimental introduction to inorganic chemistry . Walter de Gruyter GmbH & Co KG, 1937. ISBN 3111508846 , p. 161.
↑ Not explicitly listed in Regulation (EC) No. 1272/2008 (CLP) , but with the specified labeling it falls under the group entry arsenic compounds, with the exception of those named in this appendix in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA) on February 16, 2019. Manufacturers or distributors can expand the harmonized classification and labeling .
^ Matthias Weil: Investigations in the Systems Ag-Hg-XO (X = As ^V , Se ^IV , Se ^VI ): Hydrothermal Single Crystal Growth of Ag ₃ AsO ₄ , AgHg ^I₂ AsO ₄ , AgHg ^II AsO ₄ , Ag ₂ SeO ₄ and the Crystal Structure of Ag ₂ Hg ^II (SeO ₃ ) ₂ . In: Journal of Nature Research B . 58, 2003, pp. 1091-1096 ( PDF , free full text).
^ Lindsay Helmholz, Robert Levine: A Determination of Parameters in Potassium Dihydrogen Arsenate and Silver Arsenate . In: Journal of the American Chemical Society . tape 64 , no. 2 , February 1942, p. 354–358 , doi : 10.1021 / ja01254a036 .

[GESTIS-1] ↑ ^a ^b ^c ^d ^e ^f ^g ^h Entry on silver arsenate in the GESTIS substance database of the IFA , accessed on January 8, 2020 (JavaScript required)

[BUCH1-2] A ^b Heinrich Biltz , Wilhelm Klemm (Ed.), Werner Fischer (Ed.): Experimental introduction to inorganic chemistry . Walter de Gruyter GmbH & Co KG, 1937. ISBN 3111508846 , p. 161.

[CLP_100.240.769-3] Not explicitly listed in Regulation (EC) No. 1272/2008 (CLP) , but with the specified labeling it falls under the group entry arsenic compounds, with the exception of those named in this appendix in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA) on February 16, 2019. Manufacturers or distributors can expand the harmonized classification and labeling .

[4] Matthias Weil: Investigations in the Systems Ag-Hg-XO (X = As ^V , Se ^IV , Se ^VI ): Hydrothermal Single Crystal Growth of Ag ₃ AsO ₄ , AgHg ^I₂ AsO ₄ , AgHg ^II AsO ₄ , Ag ₂ SeO ₄ and the Crystal Structure of Ag ₂ Hg ^II (SeO ₃ ) ₂ . In: Journal of Nature Research B . 58, 2003, pp. 1091-1096 ( PDF , free full text).

[5] Lindsay Helmholz, Robert Levine: A Determination of Parameters in Potassium Dihydrogen Arsenate and Silver Arsenate . In: Journal of the American Chemical Society . tape 64 , no. 2 , February 1942, p. 354–358 , doi : 10.1021 / ja01254a036 .