The correct spelling of the chemical compound "magnesia alum" is /mæɡˈniːzjə ˈæləm/. It is a combination of two elements, magnesium and aluminum, that form a white crystalline substance commonly used in industrial settings. The IPA phonetic transcription shows the stress on the second syllable of "magnesia" and the first syllable of "alum". Proper spelling is crucial in the field of chemistry to ensure accurate communication and avoid potential hazards from incorrect formulas or measurements.
Magnesia alum, also known as magnesium aluminum sulfate, is a chemical compound with the molecular formula MgAl2(SO4)4·22H2O. It is a hydrated double salt formed by the combination of magnesium sulfate and aluminum sulfate.
Magnesia alum is a white crystalline solid that forms in the cuboid or octahedral crystal system. It has a molar mass of approximately 716.92 grams per mole.
This compound is often used in various industrial applications, particularly in the manufacturing of fireproofing materials, as it has excellent fire-retardant properties. It acts as a flame retardant agent due to its ability to release water when exposed to high temperatures, thus helping to cool down the surrounding area and prevent the spread of fire.
In addition to its fireproofing applications, magnesia alum is also used as a component in the production of some types of glass, including optical glass. It can act as a clarifying agent, improving the transparency and quality of the glass.
Furthermore, magnesia alum has certain medicinal uses. It has been historically used as an astringent and styptic, meaning it helps to contract body tissues and control bleeding. However, its usage in modern medicine has diminished due to the availability of more effective alternatives.
In summary, magnesia alum is a white crystalline compound used primarily as a fireproofing agent, a clarifying agent in glass manufacturing, and to a lesser extent, in medicinal applications.
A substance occurring in white fibrous masses and efflorescences in S. Amer.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
The word "magnesia alum" is a compound term consisting of two separate words: "magnesia" and "alum". Here is the etymology of each word:
1. Magnesia:
The term "magnesia" originated from the ancient Greek word "Magnēsiā", which referred to a region in Thessaly, Greece. This region was known for its natural abundance of a type of rock containing magnesium carbonate, which was used for medicinal purposes. Eventually, the name of the region became associated with the substance itself, and "magnesia" began to be used to refer to various forms of magnesium compounds.
2. Alum:
The term "alum" traces its origins to the Latin word "alumen", which originally referred to a specific type of white mineral salt. This mineral was derived from the Greek word "alýmē", meaning "bitter salt".