| 单词 | zirkelite | 
| 释义 | zirkeliten. Mineralogy.   A black or dark brown mineral which is a mixed oxide of zirconium, calcium, titanium, thorium, and other elements, occurring as small prisms or, more commonly, in amorphous form.Chemical formula: (Ca,Th,Ce)Zr(Ti,Nb)2O7. Crystal system: cubic. ΘΚΠ the world > the earth > minerals > types of mineral > oxides and hydroxides > 			[noun]		 > other oxides > other mixed oxides beudantite1826 thrombolite1844 zirkelite1895 russellite1938 zirconolite1957 1895    Nature 18 July 287/2  				Mineralogical Society, June 18.—Lewisite and Zirkelite, two new Brazilian minerals, by Dr. E. Hussak, of the Geological Survey of São Paulo, and Mr. G. T. Prior. 1895    E. Hussak  & G. T. Prior in  Mineral. Mag. 11 86  				Zirkelite. A new calcium zirconate and titanate. 1962    Mineral. Abstr. 15 538/1  				Zirkelite is widely distributed in the Palaeozoic ultrabasic and alkaline complexes of the Kola Peninsula where it occurs as an accessory mineral in calcite-amphibole rocks. 2011    B. E. Burakov et al.  Crystalline Materials Actinide Immobilisation i. 41  				Zirconolite or zirkelite is a relatively rare mineral, usually with monoclinic structure and simplified formula CaZrTi2O7. This entry has been updated (OED Third Edition, March 2021; most recently modified version published online March 2022). <  | 
	
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