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- Alum is found in the following locations12:
- Nassau, Germany
- Rio Tinto, Spain
- Krísuvík, Iceland
- Southwestern United States
Learn more:✕This summary was generated using AI based on multiple online sources. To view the original source information, use the "Learn more" links.Aluminum is the most abundant metallic element in Earth ’s crust and the most widely used nonferrous metal. Because of its chemical activity, aluminum never occurs in the metallic form in nature, but its compounds are present to a greater or lesser extent in almost all rocks, vegetation, and animals.www.britannica.com/science/aluminumThe mineral occurs in such locations as Nassau, Ger.; Rio Tinto, Spain; Krísuvík, Ice.; and the southwestern United States.
www.britannica.com/science/alumYou'll find alum in everything from baking powder and toothpaste to cosmetics and some fire extinguishers, but there are also various types of alum with different use cases.www.thoughtco.com/what-is-alum-608508Alum was the most common mordant (substance used to set dyes on fabrics) used by the dye industry, especially in Islamic countries, during the middle ages. It was the main export of the Chad region, from where it was transported to the markets of Egypt and Morocco, and then to Europe. Less significant sources were found in Egypt and Yemen.en.wikipedia.org/wiki/Alum - See moreSee all on Wikipedia
Alum - Wikipedia
Pliny informs us that a form of alumen was found naturally in the earth, and terms it salsugoterrae. Pliny wrote that different substances were distinguished by the name of alumen, but they were all characterised by a certain degree of astringency, and were all employed for dyeing and medicine. See more
Many trivalent metals are capable of forming alums. The general form of an alum is XY(SO 4) 2·n H 2O, where X is an alkali metal or ammonium, Y is a trivalent metal, and n often is 12. The most important example is chrome alum, KCr(SO 4) 2·12 H … See more
Alum found at archaeological sites
The western desert of Egypt was a major source of alum substitutes in antiquity. These evaporites were mainly FeAl 2(SO 4) 4·22 H 2O, MgAl … See moreAluminium-based alums are named by the monovalent cation. Unlike the other alkali metals, lithium does not form alums; a fact attributed to the small size of its ion.
The most important alums are
• Potassium alum, KAl(SO 4) 2·12 H 2O, also called "potash … See moreAluminium-based alums have been used since antiquity, and are still important for many industrial processes. The most widely used alum is potassium alum. It has been used since … See more
Wikipedia text under CC-BY-SA license What Is Alum and How Is It Used? - ThoughtCo
What is Alum | About Alum and Alum Substitution
Alum, also known as potassium aluminum sulfate, is a naturally occurring mineral compound used across cultures and industries in various ways. The most common type of alum found in kitchen pantries is potassium alum.
Alum | Definition, Uses, Formula, & Facts | Britannica
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Apr 18, 2024 · Alum, recognized as a double salt of potassium and aluminum sulfates, was known among the ancient Greeks and Romans as both an astringent and a mordant for wool dyeing. It found diverse application, …
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Aug 9, 2023 · Alum is typically found in the crystalline form, which is white and transparent. The boiling point of the substance is approximately 200°C. The melting point of the substance is recorded to be 92.5°C.
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Alum is an inorganic chemical compound that is generally made up of water molecules, aluminium or other metals and sulphates. Alum is basically a hydrated double sulphate salt of aluminium. The general chemical formula for alum is …
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The Egyptians mined alum as a naturally occuring mineral in the oases of Dakhla and Kharga, in the desert west of the River Nile and the landscape is honeycombed with ancient mines. The …
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