The unit-cell of freudenbergite
- 1 November 1963
- journal article
- research article
- Published by Walter de Gruyter GmbH in Zeitschrift für Kristallographie
- Vol. 119 (1-2) , 157-160
- https://doi.org/10.1524/zkri.1963.119.1-2.157
Abstract
Freudenbergite is shown to be monoclinic with unit-cell dimensions a = 12.305 Å, b = 3.822 Å, c = 6.500 Å, β = 107.30°, diffraction symbol 12/ m 1 C …, and unit-cell contents approximating to (Na,K) 2 (Ti,Nb) 6 (Fe III ,Si) 2 (O,OH) 18 . It exhibits slight structural resemblance to pseudobrookite. A 15 R -högbomite polytype is associated with freudenbergite at Katzenbuckel.Keywords
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