>.CrO a .O.NH 4 ; 



|}Cr0 2 + 8H 2 9 ) 



OX AMMONIA C AL PLATINUM B A SES. 93 



III. R=ZdSh3 



1. Chloride RCL + H,,0 x ) 



2. lodide RI 2 2 ) 

 a. SuZpAata R . S0 4 + 3H 2 3 ) R . S0 4 + 2H 2 4 ) 



4. Hyposulphate R . O., . S,0 4 5 ) 



5. Double iodate with iodate of zinc? 2(R . 2 . 2I0 2 ) + ZnO . 2I0 2 6 ) 

 Eqv. formula 3(ZnO, I0 5 ) + 4NH 3 



6. Chromates a. R . O, . CrO,+ 5H_>0 7 ) 



1». R.0 2 .Cr0 2 + 3H 2 8 ) 

 p |0.(i-0,.O.XH 41 



c - no 



R 10CrO ä .O.NB 



7. Borate R . 2 . B 4 5 . + 6H, O 10 ) 



IV. R=Zn-2XH 3 . 



1. Chloride RCl. n ) 



2. Bromide RBr 2 1J 



3. Suljphoeyam ite I J ( < y S ) _, ' | 



4. Platocyanide R . Cy 4 . Pt + H 2 14 ) 



5. Bromate R . O, . 2 Br 2 + 3H 2 O 15 ) 



6. Hyposulphite R . OS . SO* 1G ) 



7. SttZpAate a. K. O, . SO, + H,0 1T ) 



b o R | : ? ä " }ZD2)? 



8 . Sulph ite R \ q o ,-v q r Z 1 1 ' B I 



9. Carbonate with c<:rl>ou<ti< of Zinc Rj^ ^^. QfZn iy ) 



Besides these compounds the following are also known, though their atomical 

 composition is rather uncertain: 



1. Hydrate H . O | Zn(2NH 8 ) . O . Zn . O . Zn(2NH 3 )( . 0H+11H 2 0? 20 ) 



2. Ferrocyanidi Zn 



J2NH, Cy c Fe + H 2 0- 21 ) 



Zn 



I NH 3 J 



] ) Kane, Pogg. Ann. 4-4. 1838. p. 470. -) Rammelsberg, 1. c. 3 ) Kane, 1. c. p. 468. 4 ) Kane, 1. c. ; 

 Muller Ann. Ch. u. Pharm. 149. p. 70. 1869. "') Rammelsberg, Pogg. Ann. 58. p. 297. 1843. 6 ) Rammels- 

 berg, Pogg. Ann. 44. p. 564. 1838. 7 ) Malagtjti & Sarzeatj Berz. Årsber. 1844. p. 133. 8 ) Bieler Ann. 

 Ch. xx. Pharm. 151. p. 223. 1869. 9 ) Malaguti «S Sarzeao I. c. 10 ) Bisciier, Ann. Ch. u. Pharm. 151. p. 

 234. 1869. ») Kaxe, Pogg. Ann. 44. p. 468. 1838. Makigxac, Ann. des mines (5) 12. p. 8. 1857. 12 ) Ram- 

 melsberg, Pogg. Ann. 55. p. 240. 1842. ,:! ) Meitzendorff, Pogg. Ann. 56. p. 75. 1842. 14 ) Knop & Schne- 

 dermann I. fur pr. Ch. 37. p. 474. 1846. 15 ) K ammelsberg, Pogg. Ann. 52. p. 90. 1841. 16 ) Rammelsberg. 

 Pogg. Ann. 56. p. 305. 1842. n ) Kaxe Pog<r. Ann. 44. p. 469." 1838. 1S ) Rammrlsberg, Pogg. Ann. 67. p. 

 254. 1846. 19 ) Favre, Berz. Årsber. 1845. p. 204. -") Malaguti, Journ. f. pr. Ch. 97. p. 511. 1866. Möl- 

 ler, Journ. t', pr. Ch. 99. p. 256. 1866. 21 ) Bunsex, Pogg. Ann. 34. p. 136. 1835. 



