2
          
          
            Au
            
              6
            
            
              +
            
          
          
            H
            
              2
            
            
              
            
          
          
            SeO
            
              4
            
            
              
            
          
          
            
              →
              
                
                  200
                  
                    ∘
                  
                
                C
              
            
          
          
            Au
            
              2
            
            
              
            
          
          
            
              (
              
                SeO
                
                  4
                
                
                  
                
              
              )
            
            
              3
            
            
              +
            
          
          3
          
          
            H
            
              2
            
            
              
            
          
          
            SeO
            
              3
            
            
              +
            
          
          3
          
          
            H
            
              2
            
            
              
            
          
          O
        
      
    
    {\displaystyle {\ce {2Au+6H2SeO4->[200^{\circ }C]Au2(SeO4)3+3H2SeO3+3H2O}}}
  
  
    
      
        
          
            Au
            
              4
            
            
              +
            
          
          
            HCl
            
              +
            
          
          
            HNO
            
              3
            
            
              
            
          
          ⟶
          H
          
            [
            
              AuCl
              
                4
              
              
                
              
            
            ]
          
          

          
          +
          NO
          ↑
          +
          2
          
          
            H
            
              2
            
            
              
            
          
          O
        
      
    
    {\displaystyle {\ce {Au+4HCl+HNO3->H[AuCl4]{}+NO\uparrow +2H2O}}}
  Gold is similarly unaffected by most bases.
See also
Branchial cleft cyst
Thyroglossal cyst
Lachiewicz Sibley syndrome
List of cutaneous conditions

References
Bibliography
Further reading


== External links ==