Annabergite is an arsenate mineral consisting of a hydrousnickelarsenate, Ni3(AsO4)2·8H2O, crystallizing in the monoclinic system and isomorphous with vivianite and erythrite. Crystals are minute and capillary and rarely met with, the mineral occurring usually as soft earthy masses and encrustations. A fine apple-green color is its characteristic feature. It was long known (since 1758) under the name nickel bloom; the name annabergite was proposed by H. J. Brooke and W H. Miller in 1852, from Annaberg in Saxony, one of the localities of the mineral. It occurs with ores of nickel, of which it is a product of alteration. A variety, from Creetown in Kirkcudbrightshire, in which a portion of the nickel is replaced by calcium, has been called dudgeonite, after P. Dudgeon, who found it.[5]
Closely related is cabrerite wherein some of the nickel is replaced by magnesium. It is named for Sierra Cabrera in Spain where it was originally found.
^One or more of the preceding sentences incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). "Annabergite". Encyclopædia Britannica. Vol. 2 (11th ed.). Cambridge University Press. p. 59.
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annabergite, arsenate, mineral, consisting, hydrous, nickel, arsenate, aso4, 8h2o, crystallizing, monoclinic, system, isomorphous, with, vivianite, erythrite, crystals, minute, capillary, rarely, with, mineral, occurring, usually, soft, earthy, masses, encrust. Annabergite is an arsenate mineral consisting of a hydrous nickel arsenate Ni3 AsO4 2 8H2O crystallizing in the monoclinic system and isomorphous with vivianite and erythrite Crystals are minute and capillary and rarely met with the mineral occurring usually as soft earthy masses and encrustations A fine apple green color is its characteristic feature It was long known since 1758 under the name nickel bloom the name annabergite was proposed by H J Brooke and W H Miller in 1852 from Annaberg in Saxony one of the localities of the mineral It occurs with ores of nickel of which it is a product of alteration A variety from Creetown in Kirkcudbrightshire in which a portion of the nickel is replaced by calcium has been called dudgeonite after P Dudgeon who found it 5 AnnabergiteAnnabergite green from Lavrion GreeceGeneralCategoryArsenate mineralsFormula repeating unit Ni3 AsO4 2 8H2OIMA symbolAnb 1 Strunz classification8 CE 40Crystal systemMonoclinicCrystal classPrismatic 2 m same H M symbol Space groupC2 mUnit cella 10 179 2 b 13 309 3 c 4 725 1 A b 105 1 Z 2IdentificationColorApple green pale green pale rose or pale pink white gray may be zonedCrystal habitUsually as fibrous veinlets crystalline crusts or earthy rare as well formed crystalsCleavagePerfect on 010 indistinct on 100 and 102 TenacitySectileMohs scale hardness1 5 2 5LusterSubadamantine pearly on cleavages may be dull or earthyStreakPale green to whiteDiaphaneityTransparent to translucentSpecific gravity3 07Optical propertiesBiaxial Refractive indexna 1 622 nb 1 658 ng 1 687Birefringenced 0 0652V angleMeasured 84 References 2 3 4 Closely related is cabrerite wherein some of the nickel is replaced by magnesium It is named for Sierra Cabrera in Spain where it was originally found References edit Warr L N 2021 IMA CNMNC approved mineral symbols Mineralogical Magazine 85 3 291 320 Bibcode 2021MinM 85 291W doi 10 1180 mgm 2021 43 S2CID 235729616 Handbook of Mineralogy Mindat org Webmineral data nbsp One or more of the preceding sentences incorporates text from a publication now in the public domain Chisholm Hugh ed 1911 Annabergite Encyclopaedia Britannica Vol 2 11th ed Cambridge University Press p 59 nbsp Wikimedia Commons has media related to Annabergite nbsp This article about a specific mineral or mineraloid is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Annabergite amp oldid 1193464519, wikipedia, wiki, book, books, library,
