Email this article Cubic cation framework in trigonal structures of tourmalins: The core of structural type stability
- Authors: Borisov S.V.1, Pervukhina N.V.1, Magarill S.A.1
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Affiliations:
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch
- Issue: Vol 58, No 4 (2017)
- Pages: 809-812
- Section: Brief Communications
- URL: https://journal-vniispk.ru/0022-4766/article/view/161448
- DOI: https://doi.org/10.1134/S0022476617040242
- ID: 161448
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Abstract
The crystallographic analysis of the tourmaline structure type with the general formula XY3Z6(T6O18)(BO3)3V3W (R3m, Z = 3, a ≈ 16 Å, c ≈ 7.2 Å) shows that tetrahedrally coordinated T (Si, Al, …) cations, octahedrally coordinated Z (Al, Fe, Mg), and Y (Fe, Mg, Mn, …) form a joint cation framework with a sublattice whose geometry is close to Fcub (aк ≈ 4.40 Å, αк ≈ 93°) with 40% vacant positions in it. The anion ordering is less regular.
About the authors
S. V. Borisov
Nikolaev Institute of Inorganic Chemistry, Siberian Branch
Author for correspondence.
Email: borisov@niic.nsc.ru
Russian Federation, Novosibirsk
N. V. Pervukhina
Nikolaev Institute of Inorganic Chemistry, Siberian Branch
Email: borisov@niic.nsc.ru
Russian Federation, Novosibirsk
S. A. Magarill
Nikolaev Institute of Inorganic Chemistry, Siberian Branch
Email: borisov@niic.nsc.ru
Russian Federation, Novosibirsk
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