Počet záznamů: 1
Structural modelling, refinement and possible formation mechanism of a 4M.sub.3./sub. non-MDO ferriphlogopite (Ruiz Peak volcano)
- 1.
SYSNO ASEP 0367120 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Structural modelling, refinement and possible formation mechanism of a 4M3 non-MDO ferriphlogopite (Ruiz Peak volcano) Tvůrce(i) Pignatelli, I. (FR)
Dušek, Michal (FZU-D) RID, ORCID, SAI
De Titta, G. (US)
Nespolo, M. (FR)Zdroj.dok. European Journal of Mineralogy. - : Copernicus - ISSN 0935-1221
Roč. 23, č. 1 (2011), s. 73-84Poč.str. 11 s. Jazyk dok. eng - angličtina Země vyd. DE - Německo Klíč. slova mica polytypism ; ferriphlogopite ; non-MDO polytype ; PID analysis ; OD character ; structural refinement ; charge distribution Vědní obor RIV BM - Fyzika pevných látek a magnetismus CEZ AV0Z10100521 - FZU-D (2005-2011) UT WOS 000288404900007 DOI 10.1127/0935-1221/2011/0023-2078 Anotace The first reliable structural refinement of a non-MDO mica polytype from single-crystal X-ray diffraction data is presented. The sample is a 4-layer ferriphlogopite from the Ruiz Peak volcano, New Mexico. Structural refinement in the space group C2/c converges to R(obs)=6.3%. The formation of this polytype by spiral growth can be interpreted either as the result of the occurrence of a stacking fault in the exposed ledge of a 3T polytype or as a cell-twin formed by two 2M1 substructures. The formation of a non-MDO polytype from two substructures corresponding to MDO polytypes explains why the second and fourth layers of the polytype are meso-octahedral even if the space-group symmetry does not force the cis sites to be equivalent. Pracoviště Fyzikální ústav Kontakt Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Rok sběru 2012
Počet záznamů: 1