0470157 - FZÚ 2017 RIV DE eng J - Článek v odborném periodiku
Hybler, Jiří - Sejkora, J. - Venclik, V.
Polytypism of cronstedtite from Pohled, Czech Republic.
European Journal of Mineralogy. Roč. 28, č. 4 (2016), s. 765-775. ISSN 0935-1221. E-ISSN 1617-4011
Grant CEP: GA ČR GA15-04204S
Institucionální podpora: RVO:68378271
Klíčová slova: cronstedtite * 1:1 layer silicate * MDO polytypes 2H1, 2H2, 3T, 1M, 2M1 * non-MDO polytype 6T2 * twinning
Kód oboru RIV: DB - Geologie a mineralogie
Impakt faktor: 1.362, rok: 2016 ; AIS: 0.524, rok: 2016
DOI: https://doi.org/10.1127/ejm/2016/0028-2532

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.
Trvalý link: http://hdl.handle.net/11104/0267870