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Crystals of alum, the naturally occurring form of which was known back to the ancients.. The history of aluminium was shaped by the usage of its compound alum.The first written record of alum was in the 5th century BCE by Greek historian Herodotus. [2]
The archaeology of video games in the physical world entails the excavation of material culture using conventional and specialist archaeogaming methodologies. Excavation of the Atari video game burial , which uncovered E.T. the Extra-Terrestrial cartridges from a New Mexico landfill, is an example of this form of archaeogaming.
Aluminum was also mixed with water to create cement. [30] Most stone was produced locally as it was typically expensive to transport. [ 31 ] According to the writer Vitruvius Roman quarries produced many varieties of stone, including red and black tufa , as well as white or soft stone. [ 32 ]
Alunogen (from French alun, "alum"), also called feather alum and hair salt is a colourless to white (although often coloured by impurities, such as iron substituting for aluminium) fibrous to needle-like aluminium sulfate mineral. It has the chemical formula Al 2 (SO 4) 3 ·17H 2 O. [2] [3]
Roman silver ingot, Britain, 1st–4th centuries AD Lead ingots from Roman Britain. Metals and metal working had been known to the people of modern Italy since the Bronze Age.By 53 BC, Rome had expanded to control an immense expanse of the Mediterranean.
Keishon Smith was part of a team that developed Fintropolis — a Minecraft world that more than 2 million people have already used to learn about money. Hinson Middle alum shows learning ...
The Alum Bluff Group are defined by the stratigraphic position and mollusks contained within. The group includes: Chipola Formation; Oak Grove Sand; Shoal River Formation; Choctawhatchee Formation; Jackson Bluff Formation; The Alum Bluff Group has a residuum on Miocene sediments and undifferentiated sediment of the Miocene. This consists of ...
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 ...