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education.jlab.org/itselemental/ele013.html

Although aluminum is the most abundant metal in the earth's crust, it is never found free in nature. All of the earth's aluminum has combined with other elements to form compounds. Two of the most common compounds are alum, such as potassium aluminum sulfate (KAl(SO 4) 2 ·12H 2 O), and aluminum oxide (Al 2 O 3). About 8.2% of the earth's crust ...

www.reference.com/science/can-aluminum-found-720a6f4b162307d8

Aluminum can be found throughout the earth's crust, but it is most commonly extracted from bauxite ore. Because it is so soft in its pure form, most aluminum used for commercial purposes consists of alloys made from refined bauxite mixed with stronger materials.

en.wikipedia.org/wiki/Aluminium

Aluminium or aluminum is a chemical element with symbol Al and atomic number 13. It is a silvery-white, soft, nonmagnetic and ductile metal in the boron group.By mass, aluminium makes up about 8% of the Earth's crust; it is the third most abundant element after oxygen and silicon and the most abundant metal in the crust, though it is less common in the mantle below.

www.answers.com/Q/What_is_aluminum_naturally_found_in

Aluminum is most naturally found - in huge quantities - in an ore called "bauxite", which is very common in the earth's crust. There is not - and is not projected to be - any shortage of aluminum ...

io9.gizmodo.com/does-pure-aluminum-exist-in-nature-1581771277

Aluminum is frequently found in nature as part of a compound, but does it ever occur naturally on its own? After seeing which of an assortment of canned goods, ranging from soda to tinned ravioli ...

www.answers.com/Q/Where_is_aluminum_found

Aluminum is most naturally found - in huge quantities - in an ore called "bauxite", which is very common in the earth's crust. There is not - and is not projected to be - any shortage of aluminum ...

www.quora.com/Where-is-aluminum-found-in-nature

Aluminum is the most common metal in the crust of the Earth and is also common on the Moon and in stony meteorites; presumably therefor also common in asteroids and the other terrestrial planets. However, has never been found in nature in its elem...

www.thoughtco.com/aluminum-or-aluminium-facts-606496

Only two occur naturally. 27 Al is the most common, accounting for nearly 100% of all natural aluminum. 26 Al is nearly stable with a half-life of 7.2 x 10 5 years and is only found in trace amounts naturally.

www.livestrong.com/article/403282-aluminum-in-your-diet

Aluminum doesn’t fill any beneficial roles in your body, so a recommended intake has not been established. The aluminum content found in foods varies, depending on the soil, the water and how the food is processed. The estimated amount of aluminum in various foods can only be used to illustrate how much you'll get from one food to the next.

www.azom.com/article.aspx?ArticleID=1530

Aluminium is the third most abundant element - comprising some 8 percent of the earth's crust. So, why was it not discovered sooner? The main reason is that aluminium never occurs naturally in metallic form. Aluminium is found in most rocks, clay, soil and vegetation combined with oxygen and other elements.