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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]
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 ...
An article in the May/June 2019 issue of Archaeology magazine states that in China, in Henan province, an assortment of ceramic objects and jars were found, dating back 2000 years. In one of the jars, a mixture of alunite and potassium nitrate was found. The mixture was then thought to be a "mixture of immortality" mentioned in ancient Chinese ...
One of the methods of archaeometallurgy is the study of modern metals and alloys to explain and understand the use of metals in the past. A study conducted by the department of Particle Physics and Astrophysics at Weizmann Institute of Science and the department of Archaeology at the University of Haifia analyzed the chemical composition and the mass of different denominations of Euro coinage.
Governance archaeology seeks to understand the myriad combinations of ways in which people have governed themselves throughout time. A goal in this endeavor is to better understand the full range of options available to modern humans and, to the extent possible, some of the opportunities and pitfalls of different governance characteristics.
Alum shale also contains enhanced levels of radium as a result of uranium decay. [4] Between 1950 and 1989, Sweden used alum shale for the uranium production. [5] 8502 specimens of trilobite-agnostoid fauna were found in the Furongian strata of this formation in Bornholm, Denmark. Most of them are disarticulated sclerites.
The names for archaeological periods vary enormously from region to region. This is a list of the main divisions by continent and region. Dating also varies considerably and those given are broad approximations across wide areas.
Historical archaeology is a form of archaeology dealing with places, things, and issues from the past or present when written records and oral traditions can inform and contextualize cultural material. These records can both complement and conflict with the archaeological evidence found at a particular site.