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- Title
Crystal structure of ilyukhinite, a new mineral of the eudialyte group.
- Authors
Rastsvetaeva, R.; Rozenberg, K.; Chukanov, N.; Aksenov, S.
- Abstract
The crystal structure of ilyukhinite, a new mineral of the eudialyte group, is studied by X-ray diffraction. The mineral found in pegmatite bodies of the Kukisvumchorr Mountain (Khibiny alkaline complex) is characterized by low sodium content, high degree of hydration, and predominance of manganese over iron. The trigonal cell has the following parameters: a = 14.1695(6) and c = 31.026(1) Å; space group R3m. The structure is refined to final R = 0.046 in the anisotropic approximation of atomic displacements using 1527 F > 3σ F. The idealized formula of ilyukhinite ( Z = 3) is written as (HO,Na)CaMnZrSiO(OH) · 3HO. The new mineral differs from other representatives of the eudialyte group by the predominance of both oxonium in the N positions of extra-framework cations and manganese in the М2 position centering the tetragonal pyramid.
- Subjects
EUDIALYTE; CRYSTAL structure; X-ray diffraction; PEGMATITES; MANGANESE ores; HYDRATION
- Publication
Crystallography Reports, 2017, Vol 62, Issue 1, p60
- ISSN
1063-7745
- Publication type
Article
- DOI
10.1134/S1063774517010199