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Polytypism of cronstedtite from Pohled, Czech Republic
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SYSNO ASEP 0470157 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Polytypism of cronstedtite from Pohled, Czech Republic Author(s) Hybler, Jiří (FZU-D) RID, ORCID, SAI
Sejkora, J. (CZ)
Venclik, V. (CZ)Number of authors 3 Source Title European Journal of Mineralogy. - : Copernicus - ISSN 0935-1221
Roč. 28, č. 4 (2016), s. 765-775Number of pages 11 s. Language eng - English Country DE - Germany Keywords cronstedtite ; 1:1 layer silicate ; MDO polytypes 2H1, 2H2, 3T, 1M, 2M1 ; non-MDO polytype 6T2 ; twinning Subject RIV DB - Geology ; Mineralogy R&D Projects GA15-04204S GA ČR - Czech Science Foundation (CSF) Institutional support FZU-D - RVO:68378271 UT WOS 000388834500005 EID SCOPUS 84996520771 DOI https://doi.org/10.1127/ejm/2016/0028-2532 Annotation Single crystals of the 1:1 layered iron silicate cronstedtite from the new occurrence in Pohled, Czech republic were studied with aid of the single crystal X-ray diffractometer with area detector. Chemical composition of some crystals were determined by the EPMA. Three types of crystals were discerned: 1) mixed crystals of polytypes 2H1+2H2 (Bailey’s group D) with 2H1 polytype dominant in most specimens; 2) new non-MDO polytype 6T2, (group A); 3) mixed 3T+1M (group A) crystals. Rare twins by reticular merohedry were identified in one 6T2 and one 3T+1M crystals. EPMA revealed minor content of Cl. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2017
Number of the records: 1