Hydrated CO3-bearing analog of manganoeudialyte from alkali pegmatites of the Konder Pluton, Khabarovsk Krai, Russia

database, nuove specie, discrediti,
ridefinizioni, classificazioni, ecc.
Rispondi
Avatar utente
Marco E. Ciriotti
Messaggi: 25330
Iscritto il: ven 25 giu, 2004 11:31
Località: via San Pietro, 55 I-10073 Devesi/Cirié TO - Italy
Contatta:

Hydrated CO3-bearing analog of manganoeudialyte from alkali pegmatites of the Konder Pluton, Khabarovsk Krai, Russia

Messaggio da Marco E. Ciriotti » ven 05 apr, 2019 11:30

Referenza:
▪ Osipov, A.S., Antonov, A.A., Panikorovskii, T.L., Zolotarev, A.A.,Jr. (2018): Hydrated CO3-Bearing Analog of Manganoeudialyte from Alkali Pegmatites of the Konder Pluton, Khabarovsk Krai. Geology of Ore Deposits, 60, 726-735.

Abstract:
The chemical composition, crystal structure, and infrared (IR) spectrum of a hydrated CO3-bearing analog of manganoeudialyte from alkali pegmatites of the Konder pluton (Khabarovsk krai) are studied. The chemical composition of the mineral corresponds to the formula N[Na6.94H2O5.13(Y,REE)0.58 ⋅ Pb0.31K0.28Ba0.08]13.32M1[Ca5.09Sr0.89]5.98M2[Mn3+1.52Ti0.21Mg0.04Fe3+0.03Al0.02]1.82M3(Si1.16Nb0.47)1.63M4(Si)0.50 ⋅ Z[Zr3.04Hf0.03]3.07(Si3O9)2(Si9O27)2(CO3)0.28X[(H2O)4.45OH0.04Cl0.03]4.52. The IR spectrum contains the following lines (s, strong; sh, shoulder): 455s, 475s, 655, 740s, 925s, 977s, 1010s, 1145, 1420sh, 1504, 1650, 2970sh, 3240sh, 3480 cm–1. The crystal structure is refined in the Rm spatial group, a = 14.243(3), c = 30.371(6) Å, and V = 5336(2) Å for 1393 independent reflections (|Fo| > 4σF with a similarity factor R1 of 6.5%. The deficit in Na and Cl, the presence of Pb and Ba, and the high degree of hydration of the mineral indicates postcrystallization ion-exchange processes typical of hydrothermal alteration of aegirine–albite rocks of the Konder pluton.
Marco E. Ciriotti

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

Rispondi

Chi c’è in linea

Visitano il forum: Bing [Bot] e 3 ospiti