Questions tagged [minerals]

For questions about minerals, i.e. naturally occurring crystalline chemical compounds. Also consider [metallurgy].

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What is chemical formula of Bauxite?

My book says Aluminium is extracted from its ore bauxite $\ce{Al2O3.nH2O}$ What does "n" stands for? Does it mean that there is no fixed amount of water in bauxite?
7
votes
1answer
145 views

Can glass be made with anorthite?

The lunar highlands are made mostly of anorthosite (90% anorthite, the rest oxides of magnesium, iron, a little titanium, and traces of others), and pretty pure anorthite ($\ce{CaAl2Si2O8}$) is common....
6
votes
1answer
277 views

Is there any way to refine Feldspar?

Feldspars are mostly composed of three compounds: KAlSi$_3$O$_8$ NaAlSi$_3$O$_8$ CaAl$_2$Si$_2$O$_8$ I notice they each have Aluminum. Feldspar is far more common than Bauxite (the only Aluminum ore ...
1
vote
1answer
100 views

How can I obtain oxygen gas from plagioclase

I would like to know if there is a possibility to decompose plagioclase to obtain oxygen gas to be used in a combustion reaction? I know that oxygen represents $47\%$ of the weight of 1 mole of ...