On zeophyllite from Radejčín, České středohoří Mts.

Autor(en)

Werner Mikenda, Franz Pertlik, Pavel Povondra, Jaromír Ulrych

Abstrakt

A redetn. of the crystal structure of zeophyllite, idealized Ca13Si10O28F10.6H2O [a = 9.377(2), c = 36.57(2) .ANG.; Z = 3], space group R.hivin.3 (No. 148) yielded R = 0.033 for 2238 obsd. single crystal X-ray data (Fo > 3sigmaFo). The at. coordinates in combination with the anisotropic thermal displacement parameters and the internal R-value from merging equiv. intensities gave no evidence for a violation of trigonal symmetry. The structure is characterized by SiO4 tetrahedra combined to open branched vierer single layers in an arrangement normal to the threefold axes. These layers are connected via the Ca(O,F)x polyhedra and hydrogen bridges to a framework with a pronounced cleavage parallel to (00.1). The statistic occurrence of Si-OH groups in parts of the structure was confirmed by IR-investigations.

Organisation(en)

Institut für Mineralogie und Kristallographie, Institut für Organische Chemie

Externe Organisation(en)

Czech Academy of Sciences, Charles University Prague

Journal

Mineralogy and Petrology

Band

61

Seiten

199-209

Anzahl der Seiten

11

ISSN

0930-0708

DOI

https://doi.org/10.1007/BF01172484

Publikationsdatum

1997

Peer-reviewed

Ja

ÖFOS 2012

105113 Kristallographie, 105116 Mineralogie, 104026 Spektroskopie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/f8f5b3da-b0f5-4796-bcab-d14b67b0147d