Copper (II) arsenate is an inorganic compound, a salt of copper and arsenic acid with the formula Cu 3 (AsO 4 ) 2 , blue-green crystals, does not dissolve in water, forms crystalline hydrates .
| Copper arsenate | |
|---|---|
 | |
| Are common | |
| Systematic name | Copper (II) arsenate |
| Traditional names | Copper orthoarsenate; arsenic copper |
| Chem. formula | Cu 3 (AsO 4 ) 2 |
| Physical properties | |
| condition | blue green crystals |
| Molar mass | 468.48 g / mol |
| Density | 5.2 g / cm³ |
| Thermal properties | |
| T. | 750 ° C |
| Classification | |
| Reg. CAS number | 7778-41-8 |
| Pubchem | |
| Reg. EINECS number | |
| SMILES | |
| Inchi | |
| Chemspider | |
Getting
- In nature, the mineral lammiter is found - Cu 3 (AsO 4 ) 2 with impurities [1] .
- In nature, the mineral rolllandite is found - Cu 3 (AsO 4 ) 2 • 4H 2 O with impurities [2] .
- The reaction of solutions of copper sulfate and sodium arsenate :
Physical Properties
Copper (II) arsenate forms blue-green crystals of several modifications:
- monoclinic syngony , space group P 2 1 / c , cell parameters a = 0.6327 nm, b = 0.8642 nm, c = 1.1313 nm, β = 92.04 °, Z = 4 [3] ;
- triclinic syngony , space group P 1 , cell parameters a = 0.5046 nm, b = 0.5417 nm, c = 0.6354 nm, α = 70.61 °, β = 86.52 °, γ = 68.43 °, Z = 1 [4] .
It does not dissolve in water ( p PR = 35), standard and ether . Hydrolyzed in hot water.
Forms crystalline hydrate of Cu 3 (AsO 4 ) 2 • 4H 2 O composition, which loses water in the temperature range of 110-410 ° С.
Application
- Fungicide .
Notes
- ↑ Lammerit. From GeoWiki - The Open Encyclopedia of Earth Sciences.
- ↑ Rollandit. From GeoWiki - The Open Encyclopedia of Earth Sciences.
- ↑ Sandra J. Poulsen, C. Calvo. Crystal structure of Cu 3 (AsO 4 ) 2 // Canadian Journal of Chemistry. - 1968. - Vol . 46 , No. 6 . - p . 917-927 . - DOI : 10.1139 / v68-153 .
- ↑ Herta Effenberger. Copper (II) -arsenates: Cu 3 (AsO 4 ) 2 -III, Na 4 Cu (AsO 4 ) 2 , and KCu 4 (AsO 4 ) 3 // Monatshefte für Chemie. - 1988. - V. 119 , № 10 . - p . 1103-1112 . - DOI : 10.1007 / BF00809262 .
Literature
- Chemist Handbook / Redkol .: Nikolsky B.P. et al. - 3rd ed., Rev. - L .: Chemistry, 1971. - T. 2. - 1168 p.
- CRC Handbook of Chemistry and Physics . - 89th edition. - Taylor and Francis Group, LLC, 2008-2009.
- Chemical Encyclopedic Dictionary / Redkol .: Knunyants I.L. et al. - M .: Soviet Encyclopedia, 1983. - 792 p.