NICKEL

n. Niak'el. Lat., niccolum. Fr., n. Ger., N. A metallic element discovered by Cronstedt in 1757. It occurs in nature, usually a ociated with cobalt, in various minerals and also in meteorites. It is a hard, tough metal, of silvery whitene and susceptible of a high polish, and can readily be rolled, welded, and drawn into wire. It is slightly magnetic. It is not readily oxidized, and is hence used for plating iron and steel. In composition, n. acts as a bivalent, and sometimes as a quadrivalent, element. Symbol, Ni; atomic weight, 58'6. [B, 3.] Ammoniated n. chloride. A compound of ammonia and n. chloride, NiCl2.6NHg, forming a white powder or blue octaedral crystals, readily soluble in water. [B, 3.] Ammoniated 11. sulphate. Vr.,sulfate den.ammoniacal. A compund of n. sulphate and ammonia. Two such compounds occur: (1) a violet-tinted white powder, NiSO4.6NH3; and (2) a body, NiSO4.4NH3 + 2H2O, forming transparent blue prismatic crystals. [B,3.] Fleurden. (Fr.). See N. oxide. Kupfern' (Ger.). False copper ore. [B.] See under AT. arsenide. N. acetate. Fr., acetate de n. Ger., e igsaures N'oxydul. A salt of n. and acetic acid. It has been used medicinally. [Da Costa, " Med. News," Sept. 22, 1883 (B).] N. ainmoniosulphate. Qer.,schwefelsauresN'oxydulammoniak. A substance, NiSO^(NH4)2SO4 t 6H2O, formed by di olving n. in dilute sulphuric acid and precipitating with ammonium sulphate. It forms short prismatic crystals soluble in about 20 parts of water. [B, 3.] N. and ammonium chloride. Fr., chlorure double de n. et d'ammonium. A double salt, NiCl2.6NH3, of a white color tending toward violet. [B, 270 (a, 38).] N. and ammonium sulphate. See N. ammonio-sulphate. N. and pota ium cyanide. Ger., Kaliumn'cyanur, Kaliumcyann\ A substance, K,NiC4N4 + H2O = Ni 2K + Ha ' occurring as Pris' \(CNJ matic crystals, obtained by evaporating a solution of n. cyanide in a solution of pota ic cyanide. [B.] N. and pota ium nitrite. Ger., sal pet rigs aures N'oxydulkali. A substance, 4KNOa.Ni- (NO2)2, forming dark-red octaedral crystals. [B, 3.] N. antimonate. Fr., an tim on iure de n. Ger., antimonxaures N'oxydul. The compound Ni(SbO3)2 + 6H2O. [B, 2.] N. arseiiate. Fr., arseniate de n. Ger., arsensaures N'oxydul. Nickelous arsenate, Ni3(AsO4)2; an apple-green crystalline powder. [B, 2.] N. arsenide. Fr., arseniure de n. A compound of arsenic and n. Several n. arsenides exist, the most important of which is the ore AsNi (Ger., Kupfern''), which forms copper-colored crystalline ma es. [B, 3.] N. bisulphide. See N. disulphide.fi. bromide. Lat., niccoli bromidum. Fr., bromure de n. Ger., JV'- bromur. Nickelous bromide, NiBr2. The anhydrous salt forms golden-yellow scales which readily deliquesce. The hydrated salt, NiBr. + 3H2O, forms deliquescent green acicular crystals. This salt has been employed in epilepsy. [Da Costa, "Med. News," Sept. 23, 1883; B, 8.] N., calcium, and pota ium nitrite. A yellow crystalline substance, 2KNO2 + Ca(NO2)2 + Ni(NO2)2, formed by adding pota ium nitrite to a solution containing salts of n. and calcium. [B, 3.] N. carbonate. Fr., carbonate de n. Ger., kohl ens aures N'oxydul. Nickelous carbonate, NiCO3 or NiCO3 + 6H2O. [B, 3.] N. chlorate. Lat., niccolum chloratum. A substance, Ni(ClO3)2 + 6H2O, occurring as dark-green hygroscopic octaedral crystals. [B, 270 (a, 38).] N. chloride. Fr., chlorure de n. Ger., N'chlorid, N'chlorur. A substance, NiCl2, occurring in the anhydrous state as a yellow earthy ma or as golden-yellow scales, turning green on exposure to the air. In a l-to-1.000 solution it is an energetic antiseptic. [Schultz, "Dtsch. med. Wchnschr.," 1882, No. 52 (B); Da Costa, "Med. News," Sept. 29, 1883 (B); B, 3.] N. cyanide. Fr., cyanure de n. Ger., Cyann\ A substance, Ni(CN)2, obtained by the addition of hydrocyanic acid or pota ic cyanide to a n. salt. [B.] N. disulphide. An iron-gray powder, NiS2. [B, 3.] N. ferricyanide. Fr.. cyan of err ure de n. Ger., Ferridcyann\ A yellow powder, Ni3Fe2(C3N3)4, insoluble in water and in dilute hydrochloric acid. [B.] N. ferrocyanide. Ger., Ferrocyann\ A greenish-white powder, Ni2Fe(C3N3)2. [B.] N. fluoride. Ft., fluorure de n. Nickelous fluoride; a substance, NiFe2 + 3H2O, forming bluish-green crystals. [B, 3.] N. gallate. Fr., gallate de n. A green basic salt, obtained by neutralizing gallic acid with n. hydroxide or n. carbonate. [B, 46 (o, 14).] N. hem i sulphide. A pale-yellow, somewhat magnetic ma of the composition NioS. [B, 270 (a, 38).] N. hydrate, N. hydroxide. Ger., N'oxydulhydrat. Nickelous hydroxide, Ni(OH)2; an apple green crystalline substance. It forms a blue solution in aqueous ammonia. [B, 3.] See also N. sesyuihydroxide.tf. iodide. Fr., iodure de n. Ger.. N'jodur. Nickelous iodide, NiI2; iron-black scales which, when combined with water of crystallization, appear as deliquescent bluish-green prismatic crystals. [B, 3.] N'kupfer (Ger.). See ARGENT AN. N. mono sulphide. Fr., monosulfure de n. A body, NiS, occurring as bronze-yellow crystals and ma es or as a black' amorphous substance. [B. 3.] N. monoxide. Fr., monoxyde de n. Ger., N'oxydul. Nickelous oxide; a substance, NiO, forming olive-green crystals. [B, 3.] N. nitrate. Fr., azotite de n. Ger., sal peters aures N'oxydul. A substance, Ni(NO3)2 + 6H2O, forming green tabular efflorescent crystals. [B, 3.] N. nitrite. Fr., azotate (ou nitrite) de n. Ger., sal pet rigs aures N'- nxydul. The substance Ni(NO2)2. [B, 3.] N. oxide. Fr., fleur (ou oxyde) de n. See N. monoxide and a. sesquioxide. N'oxyd (Ger.). See N. sesquioxide. N'oxydul (Ger.). See N. monoxide. N. per hydroxide, N. peroxide. Fr., peroxyde de n. Ger., JV'- too; U, blae; Us, lull; U4, full; U, urn; U, like a (German). [s. 103]