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Chemistry

 Cinks
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ID number:324195
 
Author:
Evaluation:
Published: 09.01.2007.
Language: Latvian
Level: Secondary school
Literature: n/a
References: Not used
Extract

Cinks dabā un tā iegūšana. Cilvēce šo metālu pazīst jau 4500 gadu. Dabā brīvā veidā tas nav sastopams. Pazīstamākiem Cinka minerāli ir sfalerīts, jeb cinka māns ZnS un galmejs jeb cinka špats ZnCO3 . Cinku iegūst izmantojot pirometalurģijas un elektrometalurģijas metodes:
ZnCl2  Zn + 2Cl
Cinka īpašības un izmantošana. Cinks ir zilganbalts metāls, parastajos apstākļos trausls, bet temperatūras intervālā no 100º - 150ºC – plastisks, viegli lokāms un velmējams. Temperatūrā virs 200ºC tas atkal kļūst trausls. …

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