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J ) Albit = 62 Natron + 102 Thonerde + 360 Kieselsäure — 524 

 Anorthit — 56 Kalk + 102 Thonerde + 120 Kieselsäure = 278 

 1 Ab = 524 X 496,183 = 2 599 999,972 AZ 

 3 An - 834 X 467,626 = 3 900 000,084 „ 



La 1358 = 6 500 QQQ ^ Q&6 ^ 478,64 AZ. 



1 358. 



