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  2. Ammonium alum - Wikipedia

    en.wikipedia.org/wiki/Ammonium_alum

    Ammonium aluminium sulfate, also known as ammonium alum or just alum (though there are many different substances also called "alum"), is a white crystalline double sulfate usually encountered as the dodecahydrate, formula (NH 4)Al(SO 4) 2 ·12H 2 O. It is used in small amounts in a variety of niche applications.

  3. Tannerite - Wikipedia

    en.wikipedia.org/wiki/Tannerite

    Tannerite is a brand of binary explosive targets used for firearms practice and sold in kit form. [1] [2] The targets comprise a combination of oxidizers and a fuel, primarily aluminium powder, that is supplied as two separate components that are mixed by the user. The combination is relatively stable when subjected to forces less severe than a ...

  4. Alunite - Wikipedia

    en.wikipedia.org/wiki/Alunite

    Alunite is a hydroxylated aluminium potassium sulfate mineral, formula K Al 3 (S O 4) 2 (OH) 6.It was first observed in the 15th century at Tolfa, near Rome, where it was mined for the manufacture of alum.

  5. Aluminium sulfate - Wikipedia

    en.wikipedia.org/wiki/Aluminium_sulfate

    Aluminium sulfate is sometimes called alum or papermaker's alum in certain industries. However, the name " alum " is more commonly and properly used for any double sulfate salt with the generic formula X Al(SO 4 ) 2 ·12H 2 O , where X is a monovalent cation such as potassium or ammonium .

  6. Alum - Wikipedia

    en.wikipedia.org/wiki/Alum

    Crystal of potassium alum, KAl(SO 4) 2 ·12H 2 O. An alum (/ ˈ æ l ə m /) is a type of chemical compound, usually a hydrated double sulfate salt of aluminium with the general formula X Al(SO 4) 2 ·12 H 2 O, such that X is a monovalent cation such as potassium or ammonium. [1] By itself, "alum" often refers to potassium alum, with the ...

  7. Aluminium powder - Wikipedia

    en.wikipedia.org/wiki/Aluminium_powder

    Subsequently, a process of spraying molten aluminium to create a powder of droplets was developed by E. J. Hall in the 1920s. The resulting powder might then be processed further in a ball mill to flatten it into flakes for use as a coating or pigment. [1] Aluminium powder features low density with high conductivity. [2]

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  9. Lutetium aluminium garnet - Wikipedia

    en.wikipedia.org/wiki/Lutetium_aluminium_garnet

    The lasing process involving aluminum garnet crystals is carried out by the dopant atoms, usually rare-earth metals, which take the place of a few atoms of the original metal in the crystal structure (in this case lutetium). The role of the unsubstituted atoms of lutetium, aluminum, and oxygen function as support for the dopant ions.