{"id":152,"date":"2020-04-09T09:41:52","date_gmt":"2020-04-09T09:41:52","guid":{"rendered":"https:\/\/thechemicalelements.com\/?page_id=152"},"modified":"2023-08-15T16:36:10","modified_gmt":"2023-08-15T16:36:10","slug":"aluminum","status":"publish","type":"post","link":"https:\/\/thechemicalelements.com\/aluminum\/","title":{"rendered":"Aluminium (Al)"},"content":{"rendered":"\n

Aluminium is a chemical element with the atomic number 13 in the periodic table of elements<\/a>. It\u2019s the most plentiful metal found in the Earth\u2019s crust. Being a member of the boron family of periodic table elements, this strong and light-weight metal has three valence electrons that help aluminium make numerous compounds with the other chemical elements.<\/span><\/p>\n\n\n\n

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Physical and Chemical Properties of Aluminium<\/span><\/h3>\n\n\n\n
Property<\/strong><\/td>Value<\/strong><\/td><\/tr>
Symbol<\/td>Al<\/td><\/tr>
Name<\/td>Aluminum<\/td><\/tr>
Atomic number<\/td>13<\/td><\/tr>
Atomic weight<\/td>26.981539 g.mol-1<\/td><\/tr>
Group<\/td>Metal<\/td><\/tr>
Period<\/td>3<\/td><\/tr>
Color<\/td>Silvery-grey metallic with a bluish tint<\/td><\/tr>
Physical state<\/td>Solid<\/td><\/tr>
Electronegativity<\/td>1.5<\/td><\/tr>
Density<\/td>2.702 g.cm-3<\/td><\/tr>
Melting point<\/td>933.52\u00b0C, 933.473 K<\/td><\/tr>
Boiling point<\/td>2720\u00b0C, 2792 K<\/td><\/tr>
Van der Waals radius<\/td>0.143 nm<\/td><\/tr>
Ionic radius<\/td>0.54 nm (+3)<\/td><\/tr>
Isotopes<\/td>3<\/td><\/tr>
Artificial isotopes<\/td>16<\/td><\/tr>
Electronic shell<\/td>[Ne] 3s2 3p1<\/td><\/tr>
The energy of the first ionization<\/td>577.4 kJ.mol-1<\/td><\/tr>
The energy of the second ionization<\/td>1816.1 kJ.mol-1<\/td><\/tr>
The energy of the third ionization<\/td>2744.1 kJ.mol-1<\/td><\/tr>
Discoverer<\/td>Hans Christian Oersted<\/td><\/tr>
Year<\/td>1825<\/td><\/tr>
Location<\/td>Denmark<\/td><\/tr>
Pronunciation<\/td>ah-LOO-men-em<\/td><\/tr>
Crystal Structure<\/td>Cubic: Face centered<\/td><\/tr>
Shells<\/td>2,8,3<\/td><\/tr>
Valence<\/td>3<\/td><\/tr>
Covalent Radius<\/td>1.18 \u00c5<\/td><\/tr>
Atomic Radius<\/td>1.82 \u00c5<\/td><\/tr>
Atomic Volume<\/td>10.0 cm\u00b3\/mol<\/td><\/tr>
Name Origin<\/td>Latin: alumen, aluminis, (alum)<\/td><\/tr>
Oxidation States<\/td>3<\/td><\/tr>
Uses<\/td>Used for many purposes from airplanes to beverage cans. Too soft in its pure form so less than 1% of silicon or iron is added, which hardens and strengthens it.<\/td><\/tr>
Description<\/td>Amorphous form is brown powder; crystalline form has grey metallic appearance. Seventh most abundant element in the universe. Second most plentiful element in the earth’s crust.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

With the periodic table symbol Al, atomic number 13, atomic mass of 26.981539  g.mol -1, and electronic configuration [Ne] 3s\u00b2 3p\u00b9, actinium<\/a> is ductile and reaches its boiling point at 2519\u00b0C, 4566\u00b0F, 2792 K, while the melting point is achieved at 660.323\u00b0C, 1220.581\u00b0F, 933.473 K. <\/span><\/p>\n\n\n\n

This member of the boron<\/a> family of elements in the periodic table has an electronegativity of 1.6 according to Pauling, whereas the atomic radius according to van der Waals is 143 pm. <\/span><\/p>\n\n\n\n

Despite being light and soft in its pure form, aluminium is a strong metal that becomes even stronger when alloyed with another metal. Mainly found in bauxite, this silvery-grey element of the periodic table is easily bent and makes for an excellent heat and electricity conductor. It\u2019s a non-absorbing, non-magnetic, corrosion-resistant substance with a low density of 2.7 g\/cm -3.<\/span><\/p>\n\n\n\n

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How Was Aluminium Discovered?<\/span><\/h2>\n\n\n\n

In 1824, the Danish physicist Hans Christian Oersted (August 14, 1777, Rudk\u00f8bing, Denmark – March 9, 1851, Copenhagen, Denmark) first managed to isolate aluminium from the aluminium chloride compound. With the help of a potassium<\/a>–mercury<\/a> amalgam, he successfully produced a tin-resembling lump that later became the most used and the most versatile metal on Earth. <\/span><\/p>\n\n\n\n

In 1827, the German chemist Friedrich W\u00f6hler (July 31, 1800, Eschersheim, Frankfurt, Germany – September 23, 1882, G\u00f6ttingen, Germany) produced aluminium in pure form for the first time. The extracted element was a powdery substance that got its familiar silvery and shiny form by undergoing a melting process. <\/span><\/p>\n\n\n\n

The American inventor and chemist Charles Martin Hall (December 6, 1863 \u2013 December 27, 1914) managed to invent an inexpensive method of aluminium production. This eventually lead to cheap production and wide application of this metal.\u00a0\u00a0<\/span><\/p>\n\n\n\n

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How Did Aluminium Get Its Name?<\/span><\/h2>\n\n\n\n

The name of aluminium comes from the Latin word <\/span>alumen <\/span><\/i>(aluminium potassium sulfate – KAl(SO<\/span>4<\/span>)<\/span>2<\/span>\u221912H<\/span>2<\/span>O) denoting \u2018bitter salt\u2019. British chemist Sir Humphry Davy (17 December 1778 \u2013 29 May 1829) had initially labeled this chemical element as \u2018aluminium\u2019, which is the preferred name in the USA. <\/span><\/p>\n\n\n\n

However, the Europeans have decided to go with \u201caluminium\u201d as the name for the 13th\u00a0 number on the periodic table of elements, while the American Chemical Society kept the name \u201caluminium\u201d.<\/span><\/p>\n\n\n\n

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Where Can You Find Aluminium?<\/span><\/h2>\n\n\n\n

Rarely found in its pure form in nature, aluminium is mainly extracted from bauxite and cryolite ores. There\u2019s also 8.1% of this substance in the Earth\u2019s crust, which makes aluminium the most abundant metal in nature, as well as the third most abundant element (after oxygen<\/a> and silicon<\/a>).<\/span><\/p>\n\n\n\n

Due to its chemical properties, aluminium has many applications. This soft metal can be used in various industries, such as medicine, the aerospace and automotive industries, construction, etc. Aluminium food cans, beverage cans, cooking utensils, transmission lines, and aluminium foil are the most used (Al) products in everyday life.\u00a0<\/span><\/p>\n\n\n\n

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Bauxite (Al<\/span>2<\/span>H<\/span>2<\/span>O<\/span>4<\/span>)<\/span>   <\/span><\/h3>\n\n\n\n

This aluminium-rich ore labeled as bauxite was first discovered near the village of Les Baux, hence its name. Nowadays, bauxite is mainly mined in Guinea, Australia, and China. This rock with a reddish-clay hue is the main source of aluminium, extracted by the use of the Bayer process. Composed of alumina, silica, titanium<\/a> dioxide, and iron<\/a> oxides, bauxite is refined to aluminium by electrolysis and the Hall\u2013H\u00e9roult process.<\/span><\/p>\n\n\n\n

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Cryolite (Na<\/span>3<\/span>AlF<\/span>6<\/span>)<\/span><\/h3>\n\n\n\n

Cryolite is a halide mineral whose color varies from white to colorless. It\u2019s used to decrease the melting point of aluminium, while increasing its conductivity. In this way, cryolite supports a more inexpensive aluminium production. The largest cryolite mining sites are located in Ivigtut, Greenland, as well as in Colorado, USA, and Spain. In addition, the United States was the world\u2019s largest aluminium producer for many years.\u00a0<\/span><\/p>\n\n\n\n

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Aluminum Foil<\/span><\/h3>\n\n\n\n

Nowadays, there\u2019s almost no household that doesn\u2019t use aluminium foil. Made of 98.5% pure aluminium, the wide application of this foil is evident in food packaging (chocolates, thermo-isolation of food), cosmetics, medicine products, etc. <\/span><\/p>\n\n\n\n

Apart from the home use of aluminium foil, it\u2019s also employed in construction, mainly as a thermal insulator, or for the isolation of electric cables, due to its barrier-providing properties.\u00a0<\/span><\/p>\n\n\n\n

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Aluminium in the Building and Construction Industries<\/span><\/h3>\n\n\n\n

The classification as a non-combustible material also makes aluminium one of the safest building and construction materials. Due to its water and corrosion resistance, this lightweight metal has a large degree of bending which makes it one of the most ideal materials for the building and construction industries. <\/span><\/p>\n\n\n\n

The aforementioned physical properties make this member of the boron<\/a> family of elements suitable to be widely applied in the production of windows, staircases, doors, and roofs, alone or as a part of aluminium alloys. <\/span><\/p>\n\n\n\n

The Aluminium Association is the main industry group trading aluminium, located in Arlington, Virginia, United States. Formerly based in Washington D.C., this association was managing this metal as a strategic substance during World War II. Its first assembly was held in New York City in 1935. Nowadays, the aluminium industry is one of the most developed and profitable industrial and trading branches.\u00a0<\/span><\/p>\n\n\n\n

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Aluminum in the Automotive Industry and Aerospace Technology<\/span><\/h3>\n\n\n\n

Having a wide application in transportation, aluminium provides broad opportunities for the establishment of complex transport networks that shape the world as we know it. Being both strong and light-weight, in addition to being easily bendable, the aluminium metal is ideal for durable and safe construction of water, air, land, and even space vehicles.\u00a0<\/span><\/p>\n\n\n\n

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Aluminum in Food<\/span><\/h3>\n\n\n\n

Traces of aluminium can be naturally found in some foods, such as some tea herbs, cake mixes, self-rising flour, mineral water, etc. Some processed foods contain aluminium enriched additives in the form of raising agents, coloring agents, or stabilizers. These additives can be found in some processed cheeses, salt, etc.<\/span><\/p>\n\n\n\n

As an illustration, the following is a list of foods with their average levels of aluminium concentration:<\/span><\/p>\n\n\n\n