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Hellyerite is relatively unstable and, if not kept in an air-tight environment, the (originally) blue mineral decomposes in time to an X-ray amorphous, zaratite-like green phase (Anderson et al., 2002; Bottrill & Baker, 2008). ... Classification of Hellyerite...
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A secondary nickel carbonate. See also hellyerite . ... John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged: 245-246. Williams, K.L., I.M. Threadgold, and A.W. Hounslow (1959) Hellyerite, a new nickel carbonate from Heazlewood, Tasmania. Amer. Mineral., 44, 533–538. [with data on zaratite];
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Hellyerite - Wikipedia, the free encyclopedia
Hellyerite , NiCO 3 ·6H 2 O, is an hydrated nickel carbonate mineral. It is light blue to bright green in colour, has a hardness of 2.5, a vitreous luster, a white streak and crystallises in the ...
en.wikipedia.org/wiki/Hellyerite |
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General Hellyerite Information ... Hellyerite Image ... Hellyerite Crystallography...
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Green botryoidal hellyerite on matrix. Lord Brassey Mine, Heazlewood, Tasmania, Australia. ... Green botryoidal hellyerite on matrix. ... Large Hellyerite Image...
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Hellyerite NiCO3 •6H2O; c 2001-2005 Mineral Data Publishing, version 1; Crystal Data: Monoclinic. Point Group: 2/m. As crystal fragments and microcrystalline coatings, to 2 mm. Twinning: Fine lamellar twinning parallel to the perfect cleavage.
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A study of this mineral shows that it is a new species, which it is proposed to name hellyerite, after Henry Hellyer, who was the first Surveyor-General of the Van Diemen's Land Company and who conducted surveys and exploration in north-western Tasmania in the period 1826-1830. Hellyerite is the naturally...
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Rob Lavinski has a hellyerite up for auction (for the next 13 hours or so) and it is blue. Not crystalline, but a rare one. ... Interesting. It looks like an old specimen with hellyerite altered to zaratite but there is a later sprinkling of a blue mineral that needs investigation...
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Otwayite - Wikipedia, the free encyclopedia
Otwayite , Ni 2 CO 3 (OH) 2 , is a hydrated nickel carbonate mineral first described from the Otway Nickel Deposit, Nullagine, Pilbara Craton, Western Australia. Otwayite is green, with a hardn...
en.wikipedia.org/wiki/Otwayite |
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History / Historique ... Physical properties / Propriétés physiques et apparence ... Miscellaneous / Autres informations...
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