realgar

realgar
/ree al"geuhr, -gahr/, n.
arsenic disulfide, AS2S2, found in nature as an orange-red mineral and also produced artificially: used in pyrotechnics. Also called red orpiment.
[1350-1400; ME < ML realger Ar rahj al-ghar powder of the mine or cave]

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      an important ore of arsenic, a red or orange mineral containing both arsenic and sulfur. Typically it is a minor constituent of ore veins in association with orpiment (into which it disintegrates on long exposure to light). Realgar has been used by the Chinese for carvings, but these also deteriorate under light. It forms prismatic crystals of monoclinic symmetry. For detailed physical properties, see sulfide mineral (table).

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Universalium. 2010.

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Look at other dictionaries:

  • Realgar — auf Calcit aus der Jiepaiyu Mine (Shimen Mine), Hunan, China Chemische Formel As4S4 Mineralklasse nichtmetallartige Sulfide II/F.02 30 (nach …   Deutsch Wikipedia

  • Réalgar — Catégorie II : sulfures et sulfosels[1] Réalgar, Roumanie …   Wikipédia en Français

  • Realgar — Réalgar Réalgar Catégorie II : sulfures et sulfosels Réalgar, Pochodzenie, Baia Sprie Roumani …   Wikipédia en Français

  • réalgar — [ realgar ] n. m. • 1495; reagal mil. XIVe; altér. de l ar. rehj al ghar « poudre de cave; mort aux rats » ♦ Alchim., minér. Sulfure naturel d arsenic (As2S2) de couleur rouge. ● réalgar nom masculin (espagnol rejalgar, de l arabe rahdj al rhār,… …   Encyclopédie Universelle

  • Realgar — Realgar, α As4S4, is an arsenic sulfide mineral. It is a soft, sectile mineral occurring in monoclinic crystals, or in granular, compact, or powdery form, often in association with the related mineral, orpiment (As2S3). It is orange red in colour …   Wikipedia

  • realgar — REALGÁR s.n. Minereu constituit din sulfura naturală de arsen cristalizată în sistemul monoclinic, de culoare portocalie, având numeroase folosiri în vopselărie, extragerea arsenului, industria sticlei, în pirotehnie etc. [pr.: re al ] – Din fr.… …   Dicționar Român

  • realgar — reàlgār m <G realgára> DEFINICIJA min. crveni arsenov sulfid AsS, upotrebljava se za spravljanje arsenskih preparata ETIMOLOGIJA njem. Realgar fr. réalgar ← arap. rahj al ghār: prah iz rudnika ili spilje …   Hrvatski jezični portal

  • Realgar — Re*al gar (r[ e]*[a^]l g[ e]r), n. [F. r[ e]algar, Sp. rejalgar, Ar. rahj al gh[=a]r powder of the mine.] (Min.) Arsenic sulphide, a mineral of a brilliant red color; red orpiment. It is also an artificial product. [1913 Webster] …   The Collaborative International Dictionary of English

  • Realgar — (arab.), 1) alte Benennung des Arsenikrubins, s. u. Arsenik I. C) b); 2) so v.w. Rother Schwefelarsen (As S2), s. u. Arsen G) a) …   Pierer's Universal-Lexikon

  • Realgār — (Rauschrot, Rotrauschgelb, rote Arsenblende), Mineral, besteht aus Schwefelarsen As S mit 70 Teilen Arsen, findet sich in säuligen monoklinen Kristallen aufgewachsen oder eingesprengt, auch als Anflug und Überzug, morgenrot mit orangegelbem… …   Meyers Großes Konversations-Lexikon

  • Realgar — Realgar, s. Arsensulfide, Bd. 1, S. 305 …   Lexikon der gesamten Technik

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