IMA 2013-107 = zuktamrurite

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Marco E. Ciriotti
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IMA 2013-107 = zuktamrurite

Messaggio da Marco E. Ciriotti » gio 04 ott, 2018 11:47

Prossima pubblicazione.

Referenza:
▪ Britvin, S.N., Murasko, M.N., Vapnik, Y., Polekhovsky, Y.S., Krivovichev, S.V., Vereshchagin, O.S., Vlasenko, N.S., Shilovskikh, V.V., Zaitsev, A.N. (2019): Zuktamrurite, FeP2, a new mineral, the phosphide analogue of löllingite, FeAs2. Physics and Chemistry of Minerals, 46, (in press).

Abstract:
Zuktamrurite, FeP2, is a new mineral, a natural iron diphosphide found in the pyrometamorphic rocks of the Hatrurim Formation, in the southern part of the Negev Desert, Israel and on the Transjordan Plateau, Jordan. The mineral occurs as irregular grains up to 50 µm in size associated with murashkoite, FeP, and barringerite, (Fe,Ni)2P. In reflected light, zuktamrurite is white with a distinct bluish tint. It is non-pleochroic but exhibits distinct anisotropy in bluish colours. Reflectance values for the IMA COM recommended wavelengths are [Rmax/Rmin, % (λ, nm)]: 50.40/47.20 (470); 49.16/46.23 (546); 48.97/46.16 (589); 49.40/46.40 (650). It is brittle. Electron microprobe analysis of the holotype specimen gave the following chemical composition (wt%, average of 5 points): Fe 40.23; Ni 7.97; P 51.70; total 99.90. The empirical formula calculated on the basis of 3 apfu is (Fe0.86Ni0.16)1.02P1.98 corresponding to FeP2. Zuktamrurite is orthorhombic, space group Pnnm, unit cell parameters refined from the single-crystal data: a 4.9276(6), b 5.6460(7), c 2.8174(4) Å, V 78.38(1) Å3, Z = 2. Dx = 5.003 g cm−3. The crystal structure was solved and refined to R1 = 0.0121 on the basis of 109 unique reflections with I > 2σ(I). The strongest lines of the powder X-ray diffraction pattern [(d, Å) (I, %) (hkl)]: 3.714 (54) (110); 2.820 (31) (020); 2.451 (100) (120, 101); 2.242 (55) (111); 1.760 (37) (211). The mineral is named for the Zuk-Tamrur cliff (Dead Sea) located nearby the type locality, the Halamish Wadi, southern Negev Desert, Israel. Zuktamrurite is the phosphide analogue of löllingite (loellingite), FeAs2. It is the most phosphorus-rich phosphide ever found in nature.

NdR: also the phosphide analogue of seinäjokite, FeSb2, and with a marcasite-type structure.
Marco E. Ciriotti

«Things are interesting only in so far as they relate themselves to other things»

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Marco E. Ciriotti
Messaggi: 25408
Iscritto il: ven 25 giu, 2004 11:31
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Re: IMA 2013-107 = zuktamrurite

Messaggio da Marco E. Ciriotti » mer 10 apr, 2019 10:39

Pubblicazione effettuata.

Referenza:
▪ Britvin, S.N., Murasko, M.N., Vapnik, Y., Polekhovsky, Y.S., Krivovichev, S.V., Vereshchagin, O.S., Vlasenko, N.S., Shilovskikh, V.V., Zaitsev, A.N. (2019): Zuktamrurite, FeP2, a new mineral, the phosphide analogue of löllingite, FeAs2. Physics and Chemistry of Minerals, 46, 361–369.

Abstract:
Zuktamrurite, FeP2, is a new mineral, a natural iron diphosphide found in the pyrometamorphic rocks of the Hatrurim Formation, in the southern part of the Negev Desert, Israel and on the Transjordan Plateau, Jordan. The mineral occurs as irregular grains up to 50 µm in size associated with murashkoite, FeP, and barringerite, (Fe,Ni)2P. In reflected light, zuktamrurite is white with a distinct bluish tint. It is non-pleochroic but exhibits distinct anisotropy in bluish colours. Reflectance values for the IMA COM recommended wavelengths are [Rmax/Rmin, % (λ, nm)]: 50.40/47.20 (470); 49.16/46.23 (546); 48.97/46.16 (589); 49.40/46.40 (650). It is brittle. Electron microprobe analysis of the holotype specimen gave the following chemical composition (wt%, average of 5 points): Fe 40.23; Ni 7.97; P 51.70; total 99.90. The empirical formula calculated on the basis of 3 apfu is (Fe0.86Ni0.16)1.02P1.98 corresponding to FeP2. Zuktamrurite is orthorhombic, space group Pnnm, unit cell parameters refined from the single-crystal data: a 4.9276(6), b 5.6460(7), c 2.8174(4) Å, V 78.38(1) Å3, Z = 2. Dx = 5.003 g cm−3. The crystal structure was solved and refined to R1 = 0.0121 on the basis of 109 unique reflections with I > 2σ(I). The strongest lines of the powder X-ray diffraction pattern [(d, Å) (I, %) (hkl)]: 3.714 (54) (110); 2.820 (31) (020); 2.451 (100) (120, 101); 2.242 (55) (111); 1.760 (37) (211). The mineral is named for the Zuk-Tamrur cliff (Dead Sea) located nearby the type locality, the Halamish Wadi, southern Negev Desert, Israel. Zuktamrurite is the phosphide analogue of löllingite (loellingite), FeAs2. It is the most phosphorus-rich phosphide ever found in nature.
Marco E. Ciriotti

«Things are interesting only in so far as they relate themselves to other things»

Avatar utente
Marco E. Ciriotti
Messaggi: 25408
Iscritto il: ven 25 giu, 2004 11:31
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Re: IMA 2013-107 = zuktamrurite

Messaggio da Marco E. Ciriotti » mer 10 apr, 2019 13:14

Marcasite group

Anduoite RuAs2 orth Pnnm 5.41 6.206 3.01 90.00 90.00 90.00 2
Anduoite RuAs2 orth Pnnm 5.41 6.206 3.01 90.00 90.00 90.00 2
Costibite Co[SbS] orth Pn21m 4.868 5.838 3.603 90.00 90.00 90.00 2
Ferroselite FeSe2 orth Pnnm 4.8007 5.776 3.5850 90.00 90.00 90.00 2
Frohbergite FeTe2 orth Pnnm 5.268 6.273 3.879 90.00 90.00 90.00 2
Glaucodot Co[AsS] orth Pn21m 14.1580 5.6462 3.3196 90.00 90.00 90.00 4
Kullerudite NiSe2 orth Pnnm 4.89 5.96 3.67 90.00 90.00 90.00 2
Löllingite FeAs2 orth Pnnm 5.300 5.984 2.882 90.00 90.00 90.00 2
Marcasite FeS2 orth Pnnm 4.443 5.424 3.387 90.00 90.00 90.00 2
Mattagamite CoTe2 orth Pnnm 5.312 6.311 3.889 90.00 90.00 90.00 2
Nisbite NiSb2 orth Pnnm 5.178 6.319 3.832 90.00 90.00 90.00 2
Oenite Co[SbAs] orth (!) 3.304 6.092 10.258 90.00 90.00 90.00 4
Omeiite (Os,Ru)As2 orth Pnnm 5.409 6.167 3.021 90.00 90.00 90.00 2
Petříčekite CuSe2 orth Pnnm 4.918 6.001 3.670 90.00 90.00 90.00 2
Rammelsbergite NiAs2 orth Pnnm 4.759 5.797 3.539 90.00 90.00 90.00 2
Safflorite CoAs2 orth Pnnm 5.173 5.954 2.999 90.00 90.00 90.00 2
Seinäjokite FeSb2 orth Pnnm 5.81 6.490 3.190 90.00 90.00 90.00 2
Zuktamrurite FeP2 orth Pnnm 4.9276 5.6460 2.8174 90.00 90.00 90.00 2
Marco E. Ciriotti

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