OF COPPER. 379 



which corresponds so nearly with the result ob- 

 tained by Mr. Phillips that there seems no rea- 

 son to doubt that the salt is really a compound 

 of 2 atoms anhydrous carbonate, and 1 atom of 

 protohydrate of copper. 



We see from this native mineral that the oxide 

 of copper and carbonic acid are capable of com- 

 bining atom to atom ; although hitherto che- 

 mists have not succeeded in forming any such 

 compounds artificially. 



4. Phosphate of copper. This salt, though Phosphates, 

 very rare, is occasionally met with in small 

 dark green crystals, and two species have been 

 recognized by mineralogists ; viz. the anhydrous 

 phosphate and the hydrous. The primary form 

 of the first species is considered by Mr. Brooke 

 as a right rhombic prism, while Mr. Levy has 

 shown that the primary form of the other is 'an 

 oblique rhombic prism. 



From the analysis of Mr. Lunn, it appears 

 that the anhydrous phosphate is composed of 



1 atom phosphoric acid 3-5 

 1 atom oxide of copper 5 



8-5 



We have no good analysis of the native hydrous 

 phosphate ; but Chenevix has given us an ana- 

 lysis of the artificial phosphate, and from his re- 

 sult it appears to be a compound of 



16 



