New Data on the Isomorphism in Eudialyte-Group Minerals. V: Crystal Structure of an Intermediate Member of the Manganoeudialyte‒Ilyukhinite Isomorphous Series

Autor:	S. Möckel, Ramiza K. Rastsvetaeva, Nikita V. Chukanov, Alexander P. Dudka, Sergey M. Aksenov
Rok vydání:	2020
Předmět:	010302 applied physics Diffraction Mineral Materials science Infrared spectroscopy Isomorphism (crystallography) Eudialyte General Chemistry Crystal structure engineering.material 010403 inorganic & nuclear chemistry Condensed Matter Physics 01 natural sciences 0104 chemical sciences Crystallography Group (periodic table) 0103 physical sciences engineering General Materials Science Anisotropy
Zdroj:	Crystallography Reports. 65:27-32
ISSN:	1562-689X 1063-7745
DOI:	10.1134/s1063774520010204
Popis:	The crystal structure of a high-symmetry representative of the eudialyte group from the Norra Karr massif (Sweden) has been investigated by X-ray diffraction analysis and IR spectroscopy. The trigonal unit-cell parameters are found to be a = 14.1767(4) A, c = 30.286(1) A, and V = 5271.3 (3) A3; sp. gr. R$$\overline 3 $$m. The crystal structure is refined to the final reliability factor R = 6.4% in the anisotropic approximation of atomic displacements using 1071 reflections with F > 3σ(F). The idealized formula of the mineral (Z = 3) is [(Na,Н3О)13.5REE1.5]Ca6Mn2Zr3[Si25.5O73.5]Cl · H2O. The problems of hydrolysis and central symmetry of minerals with eudialyte-type structure are discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3d3963865f7d2c4f7739a9ac03ab26bb https://doi.org/10.1134/s1063774520010204 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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