My Uranopolycase at Rosina vein, Elba island (or not?...)
Last Updated: 10th Dec 2013By Giuliano Bettini
In the 90s, I have found a number of specimens, hunting for Euxenite-(Y), Uranopolycrase etc. at Rosina vein.
But........
On the book by Orlandi, Pezzotta it is said that "the crystals of Euxenite-(Y) are, from a morphological point of view, practically identical to those of Polycrase-(Y)" and that "even the Uranopolycrase and Manganocolumbite are morphologically similar to those of Euxenite-(Y)".
"Compared to Uranopolycrase both Euxenite-(Y) and Polycrase-(Y) usually show a glassy-adamantine luster and a freshness that Uranopolycrase did not, for the alteration processes that ...." and so on.
Ref: Orlandi, P., & Pezzotta, F. (1997). Minerali dell'Isola d'Elba. Edizioni Novecento Grafico, Bergamo.
So, without analysis, what are the conclusions?
Boh!
1 give up (do not post the pictures on Mindat);
2 use the best possible name, as it appears from a visual identification.
I decided on the option 2.
Examples: that's the better denomination I've found, with the help of some Italian collectors.
Euxenite-(Y)?
Polycrase-(Y)?
Uranopolycrase?
Columbite-(Mn)?
Uranopolycrase?
But........
On the book by Orlandi, Pezzotta it is said that "the crystals of Euxenite-(Y) are, from a morphological point of view, practically identical to those of Polycrase-(Y)" and that "even the Uranopolycrase and Manganocolumbite are morphologically similar to those of Euxenite-(Y)".
"Compared to Uranopolycrase both Euxenite-(Y) and Polycrase-(Y) usually show a glassy-adamantine luster and a freshness that Uranopolycrase did not, for the alteration processes that ...." and so on.
Ref: Orlandi, P., & Pezzotta, F. (1997). Minerali dell'Isola d'Elba. Edizioni Novecento Grafico, Bergamo.
So, without analysis, what are the conclusions?
Boh!
1 give up (do not post the pictures on Mindat);
2 use the best possible name, as it appears from a visual identification.
I decided on the option 2.
Examples: that's the better denomination I've found, with the help of some Italian collectors.
Euxenite-(Y)?
My Pic
Polycrase-(Y)?
My Pic
Uranopolycrase?
My Pic
Columbite-(Mn)?
My Pic
Uranopolycrase?
My Pic
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