Aluminium oxide

Aluminium oxide is a chemical compound of aluminium and oxygen with the chemical formula Al2O3. It is the most commonly occurring of several aluminium oxides, and specifically identified as aluminium(III) oxide. It is commonly called alumina, and may also be called aloxide, aloxite, or alundum depending on particular forms or applications. It commonly occurs in its crystalline polymorphic phase α-Al2O3, in which it composes the mineral corundum, varieties of which form the precious gemstones ruby and sapphire. Al2O3 is significant in its use to produce aluminium metal, as an abrasive owing to its hardness, and as a refractory material owing to its high melting point.

Natural occurrence

Corundum is the most common naturally occurring crystalline form of aluminium oxide. Rubies and sapphires are gem-quality forms of corundum, which owe their characteristic colors to trace impurities. Rubies are given their characteristic deep red color and their laser qualities by traces of chromium. Sapphires come in different colors given by various other impurities, such as iron and titanium.

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Alumina

by: Nightmare

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daranimo miranai yume wo mite.iranai mono wa subete suteta. yuzurenai omoi kono mune ni yadoshite.
Mada riaru idearu no hazama ni ite. gisei no kase ni ashi wo toraretemo. afureru shoudou osaekirenai!tsuyoku motomeru kokoro ga aru kara
itsuwari osore kyoshoku urei samazama na negateibu ni torawareru hodo yowaku wa nai. kodoku mo shiranu TRICKSTER!!!
yozora wo tsukisasu biru no mure. hoshi nado mienai sora miage. mayoi wa nai ka to jibun ni toi kakeru.
kono machijyuu afureru mono ni mamire.utsutsu wo nukasu yo na koto wa nai. asu e to tsunagaru michi no hate de. sono teki tsukamu mono wo mitai kara.
Oooo Oooo Oooo Oooo
mabuta wo toji ishki no umi ni ukande omoi egaku risou wo teni suru sono toki wo!
kagiri aru sei wo kono yo ni uke kare yuku dake wo oroka ni hitoshii. hoka no daremo ga mochienai mono. jibun to jishin iu na no kesshou e
kireigoto wo tsuki touso koto itsuka makoto e kawaru kantakuna ni shinji tsudzuketai ITS JUST MY FAITH THE ABSOLUTE TRUTH!!!




Latest News for: alumina

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At America's Last Alumina Refinery, A Trade War Spells Trade

Scrap Monster 07 Apr 2025
Atlantic Alumina, also called Atalco, became the last U.S ... What starts as a rust-colored rock comes out as powdery white aluminum oxide, a compound known as alumina that resembles sugar but whose granules are hard enough to scratch glass.
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Inalum to finish study for 2nd phase of alumina smelter project this year

The Jakarta Post 31 Mar 2025
The first phase of the SGAR is expected to produce one million tonnes of alumina annually. Alumina is the main material used to produce aluminum ingots.
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Alumina Pty Limited’s $1 Billion High‑Yield Senior Notes Offering and Alcoa Nederland Holding B.V.’s Concurrent $1 Billion Cash Tender Offers (Cravath, Swaine & Moore LLP)

Public Technologies 31 Mar 2025
) ... high-yield senior notes offering of Alumina Pty Ltd, a wholly owned subsidiary of Alcoa Corporation, a global industry leader in the production of bauxite, alumina and aluminum products ... The transactions closed on March 17, 2025 ... Patrone and D.
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SPIC launches the construction of alumina refinery in Guinea

China Daily 27 Mar 2025
The State Power Investment Corporation (SPIC) has announced the full commencement of construction for its alumina refinery in Guinea, a ...
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Alcoa fined $400k for work experience students' burns

Australian Broadcasting Corporation 26 Mar 2025
Aluminium giant Alcoa is fined $400,000 for a 2022 incident in which employees and work experience students suffered caustic burns at its Kwinana refinery in Western Australia ... .
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Hindalco plans Rs 450 billion investment in aluminum, copper, specialty alumina businesses

Yieh Corp 24 Mar 2025
... aluminum, copper, and specialty alumina businesses, focusing on upstream and high-precision engineered products.
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