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Related to realgar: arsenopyrite


 (rē-ăl′gär′, -gər)
A soft orange-red arsenic ore, As2S2, used in pyrotechnics and tanning and as a pigment.

[Middle English, from Medieval Latin, from Catalan, from Arabic rahj al-ġār, powder (of) the mine or cave : rahj, powder + al-, the + ġār, cave; see ġrr in Semitic roots.]


(Minerals) a rare orange-red soft mineral consisting of arsenic sulphide in monoclinic crystalline form. It occurs in Utah and Romania and as a deposit from hot springs. It is an important ore of arsenic and is also used as a pigment. Formula: AsS
[C14: via Medieval Latin from Arabic rahj al-ghar powder of the mine]


(riˈæl gər, -gɑr)

an orange-red mineral, arsenic sulfide, AsS, found in granular and crusty masses and also produced artificially for use in pyrotechnics.
[1350–1400; Middle English < Medieval Latin realger « Arabic rahj al-ghār powder of the mine or cave]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.realgar - a rare soft orange mineral consisting of arsenic sulphide; an important 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 periodicals archive ?
The breccias locally contain orpiment and realgar (arsenic sulfides), which are commonly found in many major Carlin-style gold deposits.
Microscopic study for realgar and orpiment is planned for the interval containing greater than 10,000 ppm arsenic.
Arsenic minerals orpiment and realgar are reported from Chitral state.
Neste sentido, interessa realgar que este tema e << popular >> no seio dos educadores e pedagogos da Educacao Nova sem, contudo, descurar a relacao, e a iniciativa, que os alunos << espontaneos >> tecem com os seus professores que, por sua vez, terao que estar a altura da dinamica desenvolvida e gerada no seio da turma (Hameline, Jornod e Belkaid, 1995, 36 e 106-115).
38, this element is present only in the red ink, suggesting the use of cinnabar with accessory minerals, such as realgar ([As.sub.4][S.sub.4]) and/or orpiment ([As.sub.2][S.sub.3]) [37].
Liushenwan (LSW), a well-known heat clearing and detoxifying herbal preparation, is composed of Niuhuang (Calculus bovis), She-xiang (Moschus), Chan-shu (Bufonis venenum), Xiong-huang (Realgar), Zhen-zhu (Margarita), and Bing-pian (Camphora).
According to previous studies, the major chemical components present in LSW are Realgar, Bufonis venenum, Moschus, Calculus bovis, Margarita, and Camphora [7].
Wise and Post then included a specimen of realgar, an important (but nontoxic) source of arsenic.
Qinghuang Powder (QHP) is made of indigo naturalis and realgar and realgar is an arsenic-containing mineral with toxicity.
In addition, some topical medications, such as fish guts, rotenone, and realgar, have been identified with liver toxicity in animal studies which may lead to liver damage with varying degrees if taken orally.
Shi, "Report of a lung cancer survey in Hunan realgar miners," Zhonghua Jie He He Hu xi Za Zhi, vol.