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Reference to kobold (German), meaning “goblin”, a superstitious Both the mineral and name were approved in late 2018 Were combined to propose a new mineral species, with the name gobelinite, to (Eisenzecher Zug mine), led by the first and second author, respectively, Of ktenasite from a French locality (Cap Garonne) and a German locality Originally independent studies of the Co analogue May be partially or fully replaced by Mg, Co, Ni and Cd (nomenclature That the crystal chemistry of the mineral is quite variable and that some ktenasite samples actually represent new mineral species, in which Zn Studies of ktenasites from many worldwide localities over the last twoĭecades by the authors and colleagues in Austria and Australia have shown Minerals, Nomenclature and Classification (CNMNC) from Was modified in an executive decision taken by the IMA Commission on New (IMA2018-125a Schlüter et al., 2020), the ideal formula of ktenasite Recently, after the approval of the Mg analogue of ktenasite with the name Samples have appreciably variable Zn:Cu ratios but noted that compositions Provided details on the crystal chemistry of ktenasite and demonstrated that Occupied by a mixture of Cu, Zn or other cations. Or less Jahn–Teller-distorted octahedral coordination geometries, which are Regular octahedral coordination geometry, and with M2 and M3 being sites with more 12 H 2O, where M1=Zn, or another minor divalent cation with near.They showed that the mineral can be viewed as having the general Norway and Colorado, USA, respectively, and the crystal structure Raade (1977) and Olsen and Lewis (1979) provided new data on ktenasite from Lavrion, Greece, by Kokkoros (1950), who suggested the approximate formula
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The secondary hydrated Zn–Cu–sulfate ktenasite was first described from Kobold, from which the designation of the element cobalt was derived. The name alludes to the Old French word gobelin, equivalent to the German word Hydrogen bonds to interstitial, fairly regular Co( H 2O) 6 octahedra.
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Sheets are decorated on both sides with SO 4 tetrahedra and linked via Jahn–Teller-distorted ( 4+2 coordination) CuO 6 octahedra. TheĪtomic arrangement is based on brucite-like sheets formed from edge-sharing, Structure determinations gave R 1=0.0310 (CG) and 0.0280 (EZ). Strong pleochroism X equaling colourless, Y equaling green and Z equaling pale green. Scanning electron microscopy–energy dispersive X-ray spectroscopy (SEM–EDS) analyses of the (Zn-free) EZ material gave the