What is the formula for copper II phosphate

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(Forwarded by Copper phosphate)

Copper (II) phosphate is a chemical compound from the group of phosphates. It is the copper salt of phosphoric acid.

Table of Contents

Occurrence


In nature, basic variants of copper phosphates occur in the form of the minerals cornetite, pseudomalachite, tagilite and libethenite.

Extraction and presentation


Copper (II) phosphate can be produced by reacting copper (II) oxide, copper (II) hydroxide or copper (II) carbonate[4][5] be made with phosphoric acid.

\ ({\ displaystyle \ mathrm {3 \ CuCO_ {3} +2 \ H_ {3} PO_ {4} \ {\ xrightarrow {\ 70 ^ {o} C \}} \ Cu_ {3} (PO_ {4} ) _ {2} +3 \ H_ {2} O + 3 \ CO_ {2} \ uparrow}} \)

The synthesis from disodium hydrogen phosphate and copper sulfate is also described:[5]

\ ({\ displaystyle \ mathrm {2 \ Na_ {2} HPO_ {4} +3 \ CuSO_ {4} \ \ longrightarrow \ Cu_ {3} (PO_ {4}) _ {2} + Na_ {2} SO_ { 4} +2 \ NaHSO_ {4}}} \)

properties


Copper (II) phosphate is a green-blue and odorless solid that is insoluble in water.[1] It crystallizes as a trihydrate[5] and has a triclinic crystal structure that is isomorphic to that of Stranskiit.[2]

There is also a basic copper orthophosphate: Cu4(OH)2(PO4)2 forms dark green crystals and can be synthetically represented by prolonged exposure to copper phosphate in hot water.[4][5] As an anhydrate it occurs naturally in libethenite, as dihydrate in tagilit.[5]

use


Copper (II) phosphate is used as a pigment (copper blue).[1]

Individual evidence


  1. abcdeKremer pigments: MSDS 45364 - copper blue (PDF; 162 kB). (Memento from April 7, 2014 in Internet Archive) Retrieved April 2, 2014.
  2. abG. L. Shoemaker, J. B. Anderson, E. Kostiner: Copper (II) phosphate. In: Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry. 33, pp. 2969-2972, doi: 10.1107 / S0567740877010012.
  3. abcData sheet copper (II) phosphate at AlfaAesar, accessed on January 3, 2011 (PDF) (JavaScript required).
  4. abM. H. Debray: "Mémoire sur la production d'un certain nombre de phosphates et d'arséniates cristallisés" in Ann. Chim. Phys.1861, 61, P. 419ff. Full text
  5. abcdeR. Abegg, F. Auerbach, I. Koppel: "Handbuch der inorganic Chemie". Verlag S. Hirzel, 1908, 2nd volume, 1st section, p. 631. Full text.









Categories:Harmful substance if swallowed | Copper compound | phosphate




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