orpiment


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Related to orpiment: arsenic, cinnabar

or·pi·ment

 (ôr′pə-mənt)
n.
Arsenic trisulfide, As2S3, a yellow mineral used as a pigment.

[Middle English, from Old French, from Latin auripigmentum : aurum, gold + pigmentum, pigment; see pigment.]

orpiment

(ˈɔːpɪmənt)
n
(Minerals) a yellow mineral consisting of arsenic trisulphide in monoclinic crystalline form occurring in association with realgar: it is an ore of arsenic. Formula: As2S3
[C14: via Old French from Latin auripigmentum gold pigment]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.orpiment - a yellow mineral occurring in conjunction with realgar; an ore of arsenic
As, atomic number 33, arsenic - a very poisonous metallic element that has three allotropic forms; arsenic and arsenic compounds are used as herbicides and insecticides and various alloys; found in arsenopyrite and orpiment and realgar
mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition
References in classic literature ?
Now I remember comrades - Old playmates on new seas - Whenas we traded orpiment Among the savages.
It was circular in form, carpeted with mats of shining straw, ceiled with beams, enriched with fleurs-de-lis of gilded metal with interjoists in color; wainscoated with rich woods sown with rosettes of white metal, and with others painted a fine, bright green, made of orpiment and fine indigo.
It could also be coloured by the addition of carbon producing black; orpiment (arsenic sulphide) for yellow and cinnabar (mercury sulphide) the distinctive brick red, which quickly became preferred for carved pieces like Sotheby's dish.
The Emet borate mining district's abundance in As-bearing minerals realgar and orpiment makes it stand out among the various borate deposits in Turkey [3].
Human acquaintance with arsenic goes back more than 2,000 years, when the ancient Greek, Chinese and Egyptian civilizations independently identified two minerals that became known as orpiment and realgar.
What colour is made from the pigment orpiment or arsenic trisulphide?
B: Exploratory design of gold and orpiment in the east of Qaen (geochemical of stream sediments, 1:20000) the connection consulter of Madan Ara Company in 2001 performed this project in an area about 80 [km.
An important European invention to get around the laborious Indian system involved adding an orpiment mixture to the indigo, which delayed precipitation long enough, by keeping the dye in its reduced state, for it to be painted or printed onto cloth.
The lacquer is naturally black and other colours are achieved by adding different substances, for example cinnabar for red and orpiment for yellow.
It has been long debated whether pre-Hispanic metallurgists successfully smelted sulfarsenide ores such as arsenopyrite (FeAsS), orpiment ([As.
Several toxic pigments have been found in the wall hangings studied, including orpiment and emerald green, which contain arsenic.