Silver iodate

Crystal structure
__ Ag +      __ I 5+      __ O 2−
General
Surname	Silver iodate
other names	Silver (I) iodate
Ratio formula	AgIO 3
Brief description	light-sensitive white odorless solid
External identifiers / databases
CAS number 7783-97-3 EC number 232-039-6 ECHA InfoCard 100.029.126 PubChem 165642 ChemSpider 145168 Wikidata Q245911
properties
Molar mass	282.77 g mol −1
Physical state	firmly
density	5.53 g cm −3
Melting point	410-470 ° C (decomposition)
solubility	practically insoluble in water (0.5 g / l at 25 ° C) soluble in ammonia
safety instructions
GHS labeling of hazardous substances danger H and P phrases H: 272-315-319-335 P: 221-210-305 + 351 + 338-302 + 352-405-501
Thermodynamic properties
ΔH f 0	−171.1 kJ / mol
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Silver iodate is an inorganic chemical compound of silver from the group of iodates .

Extraction and presentation

Silver iodate can be obtained by reacting a silver nitrate solution with potassium iodate . It can also be obtained by reacting potassium iodate with a silver sulfate or silver dithionate solution.

${\displaystyle \mathrm {Ag_{2}SO_{4}+2\ KIO_{3}\longrightarrow 2\ AgIO_{3}+K_{2}SO_{4}} }$

${\displaystyle \mathrm {Ag_{2}S_{2}O_{6}+2\ KIO_{3}\longrightarrow 2\ AgIO_{3}+K_{2}S_{2}O_{6}} }$

properties

Silver iodate is a white, light-sensitive solid that is practically insoluble in water but soluble in ammonia water . When heated, it decomposes into silver iodide and oxygen . It has an orthorhombic crystal structure with the space group Pbc 2 ₁ (space group no. 29, position 2) .

Individual evidence

1. ↑ ^{a b c d e f g h} data sheet Silver iodate, 99% at AlfaAesar, accessed on July 19, 2013 ( PDF )(JavaScript required) .
2. ↑ ^{a b} Roger Blachnik (Ed.): Pocket book for chemists and physicists . Volume III: Elements, Inorganic Compounds and Materials, Minerals . founded by Jean d'Ans, Ellen Lax. 4th, revised and revised edition. Springer, Berlin 1998, ISBN 3-540-60035-3 , pp. 286 ( limited preview in Google Book search).
3. ↑ David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Standard Thermodynamic Properties of Chemical Substances, pp. 5-4.
4. ↑ GMELIN's Handbook of Inorganic Chemistry, 8th Edition, Verlag Chemie GmbH, Part B2, Silver Compounds, page 434