Serpentine group in the context of "Codex Aureus of St. Emmeram"

⭐ In the context of the Codex Aureus of Saint Emmeram, which artistic element is considered part of the same group as the Lindau Gospels and the Arnulf Ciborium?

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⭐ Core Definition: Serpentine group

Serpentine subgroup (part of the kaolinite-serpentine group in the category of phyllosilicates) are greenish, brownish, or spotted minerals commonly found in serpentinite. They are used as a source of magnesium and asbestos, and as decorative stone. The name comes from the greenish color and smooth or scaly appearance from the Latin serpentinus, meaning "snake-like".

Serpentine subgroup is a set of common rock-forming hydrous magnesium iron phyllosilicate ((Mg,Fe)
3
Si
2
O
5
(OH)
4
) minerals, resulting from the metamorphism of the minerals that are contained in mafic to ultramafic rocks. They may contain minor amounts of other elements including chromium, manganese, cobalt or nickel. In mineralogy and gemology, serpentine may refer to any of the 20 varieties belonging to the serpentine subgroup. Owing to admixture, these varieties are not always easy to individualize, and distinctions are not usually made. There are three important mineral polymorphs of serpentine: antigorite, lizardite and chrysotile.

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πŸ‘‰ Serpentine group in the context of Codex Aureus of St. Emmeram

The Codex Aureus of Saint Emmeram (Munich, Bayerische Staatsbibliothek, Clm 14000) is a 9th-century illuminated Gospel Book. It takes its name from Saint Emmeram's Abbey in Bavaria, where it was for most of its history (named after Emmeram of Regensburg) and is lavishly illuminated. The cover of the codex is decorated with gems and relief figures in gold, can be precisely dated to 870, and is an important example of Carolingian art, as well as one of very few surviving treasure bindings of this date.

The upper cover of the Lindau Gospels is probably a product of the same workshop, though there are differences of style. This workshop is associated with the Holy Roman Emperor Charles II (the Bald), and often called his "Palace School". Its location (if it had a fixed one) remains uncertain and much discussed, but Saint-Denis Abbey outside Paris is one leading possibility. The Arnulf Ciborium (a miniature architectural ciborium rather than the vessel for hosts), now in the Munich Residenz, is the third major work in the group, along with the frame of an antique serpentine dish in the Louvre. Recent scholars tend to group the Lindau Gospels and the Arnulf Ciborium in closer relation to each other than the Codex Aureus to either.

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Serpentine group in the context of Serpentinite

Serpentinite is a metamorphic rock composed predominantly of serpentine group minerals formed by serpentinization of mafic or ultramafic rocks. The ancient origin of the name is uncertain; it may be from the similarity of its texture or color to snake skin. Greek pharmacologist Dioscorides (AD 50) recommended this rock to prevent snakebite.

Serpentinite has been called serpentine or serpentine rock, particularly in older geological texts and in wider cultural settings.

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Serpentine group in the context of Asbestiform

Asbestiform is a crystal habit. It describes a mineral that grows in a fibrous aggregate of high tensile strength, flexible, long, and thin crystals that readily separate. The most common asbestiform mineral is chrysotile, commonly called "white asbestos", a magnesium phyllosilicate part of the serpentine group. Erionite, part of the zeolite group is found in asbestiform habit and is highly carcinogenic. Other asbestiform minerals include the zeolite mordenite, riebeckite, an amphibole whose fibrous form is known as crocidolite or "blue asbestos", and brown asbestos, a cummingtonite-grunerite solid solution series. Another Zeolite that has come to light recently that is asbestiform is fibrous Ferrierite.

The United States Environmental Protection Agency explains that, "In general, exposure may occur only when the asbestos-containing material is disturbed or damaged in some way to release particles and fibers into the air."

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