Crystal structure of byelorussite-(Ce) NaMnBa<sub>2</sub>Ce<sub>2</sub>(TiO)<sub>2</sub>[Si<sub>4</sub>O<sub>12</sub>]<sub>2</sub>(F,OH) · H<sub>2</sub>O

Autor(en)
Natalia V Zubkova, Dmitry Y. Pushcharovsky, Gerald Giester, Ekkehart Tillmanns, Igor V Pekov, O D Krotova
Abstrakt

The crystal structure of the mineral byelorussite-(Ce) NaMnBa2Ce2Ti2Si8O26(F,OH) · H2O belonging to the joaquinite group was solved and refined to R = 0.033 based on 4813 reflections with I > σ2(I). The parameters of the orthorhombic unit cell are a = 22.301(4) Å, b = 10.514(2) Å, c = 9.669(2) Å, V = 2267.1(8) Å3, sp. gr. Ama2, and Z

= 4. The structure is composed of three-layer sheets, which consist of

dimers of edge-sharing Ti octahedra located between isolated

four-membered [Si4O2]

rings. The sheets are linked to each other by Mn 5-vertex polyhedra to

form a heteropolyhedral framework. Large cavities in the framework are

occupied by Na 6-vertex polyhedra, Ba 11-vertex polyhedra, and REE

9-vertex polyhedra. © 2004 MAIK "Nauka/Interperiodica".

Organisation(en)
Institut für Mineralogie und Kristallographie
Externe Organisation(en)
Lomonosov Moscow State University (MSU), Russian Academy of Sciences
Journal
Crystallography Reports
Band
49
Seiten
964-968
Anzahl der Seiten
5
ISSN
1063-7745
DOI
https://doi.org/10.1134/1.1828140
Publikationsdatum
2004
Peer-reviewed
Ja
ÖFOS 2012
1051 Geologie, Mineralogie
Link zum Portal
https://ucrisportal.univie.ac.at/de/publications/d74bc55c-4590-45c2-bd26-13bbce5c36db