Talk:Cryolite
From Wikipedia, the free encyclopedia
 |
This page is within the scope of WikiProject Greenland. If you would like to participate, please join the project and help with our open tasks. | |
| ??? | This article has not yet received a rating on the quality scale. | |
| ??? | This article has not yet received a rating on the importance scale. | |
[edit] mistatement
This following is a mistatement:
"The difficulty in the extraction of aluminium was in its high melting point (above 2000°C). Cryolite lowers the melting point to approximately 900°C to conserve energy"
The high melting point refers to the Oxide. I suggest the following correction:
"The difficulty in the extraction of aluminium was the oxides' high melting point (above 2000°C). Cryolite lowers the melting point to approximately 900°C to conserve energy"
````John Turner jmtwilldoit2@hotmail.com
[edit] Commom Misunderstanding
The cryolite does not lower the melting point of aluminium oxides. However, the aluminium oxide can be dissolved in molten cryolite at around 900°C. This frees the ions of the aluminium oxide, allowing the posotive aluminium ions to collect at the cathode(s), and the negative oxygen ions to collect at the anode(s). It essentially gives the same effect as if the aluminium oxides were in a molten state.
Harim.chicken 13:21, 26 April 2007 (UTC)
[edit] Merge with sodium hexafluoroaluminate
There is no doubt that these two articles should be merged. Cryolite is the mineral name for sodium hexafluoroaluminate Petergans 09:36, 14 May 2007 (UTC)
This is a mineral article as opposed to a chemical compound and should remain separate with different emphases. Vsmith 14:09, 29 May 2007 (UTC)
