Iron distribution in Fe-rich bustamite-type minerals

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Marco E. Ciriotti
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Iscritto il: ven 25 giu, 2004 11:31
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Iron distribution in Fe-rich bustamite-type minerals

Messaggio da Marco E. Ciriotti » gio 26 lug, 2018 11:27

Prossima pubblicazione.

Referenza:
▪ Shchipalkina, N.V., Chukanov, N.V., Rusakov, V.S., Pekov, I.V., Koshlyakova, N.N., Scholz, R. (2019): Iron distribution in Fe-rich bustamite-type minerals. Physics and Chemistry of Minerals, 46, (in press).

Abstract:
The crystal chemical role of iron in Fe-rich pyroxenoids with bustamite-type structure was studied on five samples containing from 6.0 to 10.3 wt% FeO using electron microprobe, XRD crystal structure refinement and Mössbauer spectroscopy. The crystal chemical formulae are (Z = 1): M1(Mn0.85Fe2+0.15)2M2(Ca0.8Mn0.2)2M3(Fe2 + 0.5Mn0.4(Mg,Al,Zn)0.1)M4Ca[Si3O9]2 (Broken Hill, New South Wales, Australia), M1(Mn0.8Fe2+0.2)2M2(Mn0.55Са0.45)2M3(Fe2 + 0.60Mn0.40)M4Ca[Si3O9]2 (Olginskoe, Primorskiy Kray, Russia), M1(Mn0.8Fe2+0.2)2M2(Ca0.5Mn0.5)2M3(Mn0.50Fe2+0.35Mg0.15)M4(Ca0.7Mn0.3)[Si3O9]2 (Broken Hill), M1Ca2M2Ca2M3Fe2+M4Ca[Si3O9]2 (Tyrnyauz, North Caucasus, Russia), M1Ca2M2Ca2 M3(Fe2 + 0.6Mn0.4)M4Ca[Si3O9]2 (Dalnegorsk, Primorskiy Kray, Russia). Iron in bustamite-type compounds concentrates at the M1 and M3 sites which are characterized by the shortest ⟨M–O⟩ distances. In general, the distribution of Fe and Mn in bustamite-type minerals is rather similar. Iron only slightly prefer the smallest in volume M3O6 octahedron rather than M1O6. Unlike related pyroxenoids of the rhodonite group, significant Mn:Fe ordering in bustamite-type minerals was not observed.
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: 25441
Iscritto il: ven 25 giu, 2004 11:31
Località: via San Pietro, 55 I-10073 Devesi/Cirié TO - Italy
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Re: Iron distribution in Fe-rich bustamite-type minerals

Messaggio da Marco E. Ciriotti » dom 10 mar, 2019 18:50

Pubblicazione effettuata.

Referenza:
▪ Shchipalkina, N.V., Chukanov, N.V., Rusakov, V.S., Pekov, I.V., Koshlyakova, N.N., Scholz, R. (2019): Iron distribution in Fe-rich bustamite-type minerals. Physics and Chemistry of Minerals, 46, 133–142.
Marco E. Ciriotti

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

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