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Cinnabar is the more stable form, and is a structure akin to that of HgO: each Hg center has two short Hg−S bonds (each 2.36 Å), and four longer Hg···S contacts (with 3.10, 3.10, 3.30 and 3.30 Å separations). In addition, HgS is found in a black, non-cinnabar polymorph (metacinnabar) that has the zincblende structure. [5]
The first documented use of vermilion pigment, made with ground cinnabar, dates to 8000–7000 BC, and was found at the Neolithic village of Çatalhöyük, in modern-day Turkey. Cinnabar was mined in Spain beginning in about 5300 BC.
red cinnabar (α-HgS, trigonal, hP6, P3221) is the form in which mercury is most commonly found in nature. Cinnabar has rhombohedral crystal system. Crystals of red are optically active. This is caused by the Hg-S helices in the structure. [5] black metacinnabar (β-HgS) is less common in nature and adopts the zinc blende crystal structure (T 2 ...
The Wakasugiyama Cinnabar Mine (若杉山辰砂採掘遺跡, Wakasugiyama shinshasaikutsu iseki) is an archaeological site with the traces of a late Yayoi to early Kofun period cinnabar production site, located in the Suii neighborhood of the city of Anan, Tokushima on the island of Shikoku in Japan.
Principal ongoing impact is from mercury contamination of spring water flowing beneath the site; moreover, historical analysis has shown that the volume of spring water itself has been greatly reduced from levels of a century ago. This reduction of spring flow has come about due to the extensive mine shafts driven to achieve the cinnabar ...
Consumer Reports said it wanted to test ground cinnamon after the Food and Drug Administration received reports in late 2023 and early 2024 of hundreds of children becoming ill with lead poisoning.
Cinnabar was discovered here in 1902 and mined from 1905. The property was operated in World War II by the Texas Mercury Co. Cinnabar occurs in ore-bearing fractures or veins within a syenite intrusion. The mine included four principal shafts and two medium-sized furnaces. [10] The mine was soon abandoned when water was encountered, flooding ...
THMs have been detected at 38.1 ppb in NYC’s water supply, according to EWG data from 2013-19. The US limits THM in drinking water to 80 ppb, while the EWG recommends not exceeding 0.15 ppb .