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Difference between cuprokalininite and florensovite
Posted by Łukasz Kruszewski
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Łukasz Kruszewski
Difference between cuprokalininite and florensovite February 23, 2013 11:04AM |
Registered: 9 years ago Posts: 847 |
I can't find any difference between cuprokalininite, Cu(Cr1.5V0.5)S4, and florensovite, Cu(Cr1.5Sb0.5)S4, despite of the substution of Cr by V or Sb. Both species belong to thiospinel group and both crystallize in the Fd3m space group...
Regards!
Luke K.
Regards!
Luke K.
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Marco E. Ciriotti
Re: Difference between cuprokalininite and florensovite February 23, 2013 12:09PM |
Registered: 10 years ago Posts: 4,409 |
Hi Luke,
"cuprokalinite" is not a valid species recognized by IMA CNMNC.
Ciao. Marco
"cuprokalinite" is not a valid species recognized by IMA CNMNC.
Ciao. Marco
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Frank Keutsch
Re: Difference between cuprokalininite and florensovite February 23, 2013 02:32PM |
Registered: 10 years ago Posts: 252 |
Hi,
according to the IMA list I downloaded (says updated in November 2012) cuprokalininite is accepted (2010-008 CuCr2S4) and florensovite is also accepted (1987-012 CuCr1.5Sb0.5S4). I assume the positions of the Sb must be specific and distinguish the two species then.
However, Marco really knows about IMA status so there might be something I am not interpreting correctly from the list.
Frank
according to the IMA list I downloaded (says updated in November 2012) cuprokalininite is accepted (2010-008 CuCr2S4) and florensovite is also accepted (1987-012 CuCr1.5Sb0.5S4). I assume the positions of the Sb must be specific and distinguish the two species then.
However, Marco really knows about IMA status so there might be something I am not interpreting correctly from the list.
Frank
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Anatoly Kasatkin
Re: Difference between cuprokalininite and florensovite February 23, 2013 03:13PM |
Registered: 7 years ago Posts: 89 |
According to the author of both minerals (Leonid Reznitski) the main difference is in valency of Cr. Florensovite has only trivalent Cr with CuCr3+1.5Sb0.5S4 while cuprokalininite - both 3+ and 4+ with CuCr3+Cr4+S4. That leads to a difference in physical properties (cuprokalininite is ferromagnetic while florensovite is antiferromagnetic). There are also some minor differences in optical properties, plus the morphology of crystals/grains is absolutely different.
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Marco E. Ciriotti
Re: Difference between cuprokalininite and florensovite February 23, 2013 04:13PM |
Registered: 10 years ago Posts: 4,409 |
Sorry Frank and Luke, I confused with kalinite (Cu-rich kalinite), instead of cuprokalininite.
Cuprokalininite is a valid species. See the replay of Anatoly for the differences.
Edited 1 time(s). Last edit at 02/23/2013 04:19PM by Marco E. Ciriotti.
Cuprokalininite is a valid species. See the replay of Anatoly for the differences.
Edited 1 time(s). Last edit at 02/23/2013 04:19PM by Marco E. Ciriotti.
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