Mn3Nb6O11 und Mg3Nb6O11 - Darstellung von Einkristallen und Strukturverfeinerung / Mn3Nb6O11 and Mg3Nb6O11 - Preparation of Single Crystals and Structure Refinement
Open Access
- 1 May 1987
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung B
- Vol. 42 (5) , 536-538
- https://doi.org/10.1515/znb-1987-0504
Abstract
Dark green single crystals of Mg3Nb6O11 have been prepared by heating a pellet containing MgO, Nb, Nb2O5 (15:14:8) at 1550 °C in a Nb-container. Single crystals of the isotypic Mn3Nb6O11 were formed by heating a mixture of LiF, MnF2, Mn, NbO, NbO2 (1:1:1:1:2) in a corundum crucible at 750 °C. Both compounds crystallize in the trigonal space group P3̄ m 1 (Z = 1) with a = 6.041(1), c = 7.466(1) and a = 6.080(1), c = 7.627(1), respectively. The positional parameters for Mg3Nb6O11 are in excellent agreement with those determined by Marinder from powder data.Keywords
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