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- La donnayita-(Y) és un mineral de la classe dels carbonats que pertany al grup de la donnayita. Rep el nom de la en honor de la cristal·lògrafa alemanya Gabrielle Donnay i el seu marit, Joseph Désiré Hubert Donnay, per les seves importants contribucions a la cristal·lografia. (ca)
- Donnayite-(Y) is a rare-earth carbonate mineral containing the rare-earth metal yttrium. It was first discovered in 1978 at Mont Saint-Hilaire, Quebec. Donnayite was subsequently identified and named after and his wife, Gabrielle Donnay. Both were prominent mineralogists and crystallographers, and J. D. H. Donnay was awarded the by the Mineralogical Society of America in 1971 for his emphasis on the importance of optical mineralogy and crystal morphology. Donnayite tends to occur in small quantities in the pegmatite dykes and miarolitic cavities of mountainous regions. It crystallizes in this environment with increasing alkalinity values until the alkalinity suddenly drops during the last stage of crystallization. This results in increasing amounts of Na carbonates and REE minerals. First discovered at Mont St-Hilaire, donnayite has since been found in the Southern Ural Mountains of Russia and the Narssarssuk pegmatite of South Greenland. Donnayite crystals tend to be small and the color is commonly pale yellow to yellow with a white streak and a vitreous luster. Donnayite crystals usually display trigonal or hexagonal symmetry and have a hardness of 3. Twinning is extremely common in this mineral. Minerals closely related to donnayite include synchysite, calcite, sphalerite, microcline, and analcime. Donnayite is isomorphous with weloganite and mckelveyite. (en)
- Donnayita-(Y) karbonato motako minerala da eta donnayite taldearen kidea da. (eu)
- La donnayite-(Y) è un minerale appartenente al gruppo della mckelveyite. (it)
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- La donnayita-(Y) és un mineral de la classe dels carbonats que pertany al grup de la donnayita. Rep el nom de la en honor de la cristal·lògrafa alemanya Gabrielle Donnay i el seu marit, Joseph Désiré Hubert Donnay, per les seves importants contribucions a la cristal·lografia. (ca)
- Donnayita-(Y) karbonato motako minerala da eta donnayite taldearen kidea da. (eu)
- La donnayite-(Y) è un minerale appartenente al gruppo della mckelveyite. (it)
- Donnayite-(Y) is a rare-earth carbonate mineral containing the rare-earth metal yttrium. It was first discovered in 1978 at Mont Saint-Hilaire, Quebec. Donnayite was subsequently identified and named after and his wife, Gabrielle Donnay. Both were prominent mineralogists and crystallographers, and J. D. H. Donnay was awarded the by the Mineralogical Society of America in 1971 for his emphasis on the importance of optical mineralogy and crystal morphology. Donnayite tends to occur in small quantities in the pegmatite dykes and miarolitic cavities of mountainous regions. It crystallizes in this environment with increasing alkalinity values until the alkalinity suddenly drops during the last stage of crystallization. This results in increasing amounts of Na carbonates and REE minerals. Firs (en)
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- Donnayita-(Y) (ca)
- Donnayita-(Y) (eu)
- Donnayite-(Y) (en)
- Donnayite-(Y) (it)
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