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orpiment n. Arsenic trisulfide, As 2 S 3 , a yellow mineral used as a pigment. [Middle English, from Old French, from Latin auripigmentum : aurum ... Orpiment was ground, processed and used for centuries as a pigment in painting, being one of the few clear, bright yellow pigments available to artists up until the...
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www.answers.com/topic/orpiment
www.answers.com/topic/orpiment
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Fully searchable and cross-referenced information about Orpiment from The Probert Encyclopaedia. ... Orpiment is a secondary mineral with the formulae As2S3 and a relative hardness of 2. It is a rare mineral usually associated with realgar. Orpiment is an important source of industrial arsenic and is used in dyeing.
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www.probertencyclopaedia.com/cgi-bin/res.pl?keyword=Orp...
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Orpiment from Barneys Canyon Salt Lake County, Utah. - Through open-pit mining methods Barneys Canyon Mining Company, which : Encyclopedia.com ... Orpiment of this general character is not new to Nevada's Carlin Trend gold deposits, as spectacular orpiment specimens have come from Newmont Mining Corporation's Twin Creek...
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www.encyclopedia.com/doc/1G1-132193459.html
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An ancient pigment, used throughout the Middle East and Asia through the late 19th century. During the Renaissance, orpiment was imported to Venice from Asia Minor. It is incompatible with lead and copper pigments like lead white, lead-tin yellow, and verdigris, and will darken them. ... When was Orpiment used?
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www.webexhibits.org/pigments/indiv/history/orpiment.htm...
www.webexhibits.org/pigments/indiv/history/orpiment.html
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Ancient Middle Eastern artists used orpiment (from Latin auri, “golden”; pigmentum, “paint”) as a pigment, but it gained little attention from Western artists until the 18th century, when production of artificial arsenic trisulfide was begun.
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www.britannica.com/EBchecked/topic/433217/orpiment
www.britannica.com/EBchecked/topic/433217/orpiment
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(inorganic chemistry) As2S3 An acidic compound in the form of yellow or red monoclinic crystals with a melting point at 300°C; occurs as the mineral orpiment; used as a pigment.
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www.answers.com/topic/arsenic-trisulfide
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Arsenic Trisulfide (As2S3, CAS#:1303-33-9): An acidic compound in the form of yellow or red monoclinic crystals with a melting point at 300°C; occurs as the mineral orpiment; used as a pigment.
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www.chemicalland21.com/industrialchem/inorganic/ARSENIC...
www.chemicalland21.com/industrialchem/inorganic/ARSENIC%20TRIOXIDE.htm
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For over 2,400 years, arsenic — from the Greek word arsenikon, meaning “potent” — has been used as both a therapeutic agent and a poison. During their time, Hippocrates used the arsenic sulfides realgar and orpiment to treat ulcers, and Dioscorides used orpiment as a depilatory.
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www.hemonctoday.com/article.aspx?rid=32624
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occurs as the mineral orpiment; used as a pigment. Arsenic Acid (H3AsO4, CAS#: 1327-52-2, 7778-39-4): White, poisonous crystals, soluble in water and alcohol; used in wood treatment, finishing agent for glass and metal, manufacturing of dyestuffs and organic arsenic compounds, soil sterilant.
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