Thenard's blue

Thenard's blue
Cobalt Co"balt (k[=o]"b[o^]lt; 277, 74), n. [G. kobalt, prob. fr. kobold, kobel, goblin, MHG. kobolt; perh. akin to G. koben pigsty, hut, AS. cofa room, cofgodas household gods, Icel. kofi hut. If so, the ending -old stands for older -walt, -wald, being the same as -ald in E. herald and the word would mean ruler or governor in a house, house spirit, the metal being so called by miners, because it was poisonous and troublesome. Cf. {Kobold}, {Cove}, {Goblin}.] 1. (Chem.) A tough, lustrous, reddish white metal of the iron group, not easily fusible, and somewhat magnetic. Atomic weight 59.1. Symbol Co. [1913 Webster]

Note: It occurs in nature in combination with arsenic, sulphur, and oxygen, and is obtained from its ores, smaltite, cobaltite, asbolite, etc. Its oxide colors glass or any flux, as borax, a fine blue, and is used in the manufacture of smalt. It is frequently associated with nickel, and both are characteristic ingredients of meteoric iron. [1913 Webster]

2. A commercial name of a crude arsenic used as fly poison. [1913 Webster]

{Cobalt bloom}. Same as {Erythrite}.

{Cobalt blue}, a dark blue pigment consisting of some salt of cobalt, as the phosphate, ignited with alumina; -- called also {cobalt ultramarine}, and {Thenard's blue}.

{Cobalt crust}, earthy arseniate of cobalt.

{Cobalt glance}. (Min.) See {Cobaltite}.

{Cobalt green}, a pigment consisting essentially of the oxides of cobalt and zinc; -- called also {Rinman's green}.

{Cobalt yellow} (Chem.), a yellow crystalline powder, regarded as a double nitrite of cobalt and potassium. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

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  • thenard's blue — thə̇ˈnärdz noun Usage: usually capitalized T Etymology: after Baron L. J. Thénard 1. : cobalt blue 1a 2. : cobalt blue 2 …   Useful english dictionary

  • Thenard's blue — /teɪnadz ˈblu/ (say taynahdz blooh) noun a blue pigment consisting of a calcined mixture of cobalt oxide and alumina. {named after LJ Thénard. See thenardite} …  

  • Thenard's blue — /theuh nahrdz , teuh /. See cobalt blue. [see THENARDITE] * * * …   Universalium

  • Thenard's blue — noun see cobalt blue …   Useful english dictionary

  • Thenard, Louis-Jacques — ▪ French chemist, teacher, and author born May 4, 1777, La Louptière, Fr. died June 21, 1857, Paris  French chemist, teacher, and author of an influential four volume text on basic chemical theory and practice (1813–16).       A peasant s son,… …   Universalium

  • Thenard blue — kobalto metaaliuminatas statusas T sritis chemija formulė CoAl₂O₄ atitikmenys: angl. azure blue; cobalt blue; cobalt methaaluminate; cobalt ultramarine; kingˊs blue; Thenard blue rus. кобальта метаалюминат; кобальтовая синь; синий кобальт;… …   Chemijos terminų aiškinamasis žodynas

  • Louis Jacques Thénard — Infobox Scientist name = Louis Jacques Thénard box width = image width =200px caption = Louis Jacques Thénard birth date = May 4, 1777 birth place = La Louptière, Aube death date = June 21, 1857 death place = Paris residence = citizenship =… …   Wikipedia

  • Cobalt blue — Cobalt Co balt (k[=o] b[o^]lt; 277, 74), n. [G. kobalt, prob. fr. kobold, kobel, goblin, MHG. kobolt; perh. akin to G. koben pigsty, hut, AS. cofa room, cofgodas household gods, Icel. kofi hut. If so, the ending old stands for older walt, wald,… …   The Collaborative International Dictionary of English

  • cobalt blue — 1. a deep blue to a strong greenish blue color. 2. any of a number of pigments containing an oxide of cobalt. Also called king s blue, Thenard s blue. [1825 35] * * * …   Universalium

  • Cobalt blue — This article is about the color. For other uses, see Cobalt blue (disambiguation). Cobalt blue is a cool, slightly desaturated blue color, historically made using cobalt salts of alumina. It is used in certain ceramics (historically, especially… …   Wikipedia

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