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Realgar (/ r i ˈ æ l ɡ ɑːr,-ɡ ər / ree-AL-gar, -gər), also known as arsenic blende, ruby sulphur or ruby of arsenic, is an arsenic sulfide mineral with the chemical formula α-As 4 S 4. It is a soft, sectile mineral occurring in monoclinic crystals, or in granular, compact, or powdery form, often in association with the related ...
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The Artist's Handbook of Materials and Techniques is a reference book by Ralph Mayer (1895–1979). [1] Intended by the author for use by professional artists, it deals mostly with the chemical and physical properties of traditional painterly materials such as oil, tempera, and encaustic, as well as solvents, varnishes, and painting mediums.
Artstor is a nonprofit organization that builds and distributes the Digital Library, an online resource of more than 2.5 million images in the arts, architecture, humanities, and sciences, and Shared Shelf, a Web-based cataloging and image management software service that allows institutions to catalog, edit, store, and share local collections.
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Pararealgar is an arsenic sulfide mineral with the chemical formula As 4 S 4, [3] also represented as AsS. [5] It forms gradually from realgar under exposure to light. Its name derives from the fact that its elemental composition is identical to realgar, As 4 S 4.
One year after Hurricane Ian doused the Orlando region with historic rainfall, dozens of condo owners at the Dockside at Ventura are still not back home. Water flowed over a pond in the center of ...
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