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Ion substitutions and structural adjustment in Cr-bearing tourmalines. / Vereshchagin, O.S.; Rozhdestvenskaya, I.V.; Frank-Kamenetskaya, O.V.; Zolotarev, A.A.

In: European Journal of Mineralogy, Vol. 26, No. 2, 2014, p. 309-321.

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Vereshchagin, O.S. ; Rozhdestvenskaya, I.V. ; Frank-Kamenetskaya, O.V. ; Zolotarev, A.A. / Ion substitutions and structural adjustment in Cr-bearing tourmalines. In: European Journal of Mineralogy. 2014 ; Vol. 26, No. 2. pp. 309-321.

BibTeX

@article{d65f7f5f55054fc88ccca02775773437,
title = "Ion substitutions and structural adjustment in Cr-bearing tourmalines",
abstract = "The geological settings of Cr-bearing tourmaline occurrences are reviewed and the crystal chemistry of Cr-bearing tourmalines is analysed on the basis of new X-ray single-crystal structure refinements (R0.019–0.025) of three crystals from the Ural deposits (Cr2O3 content ∼6 wt.%) and one from Umba Valley, Tanzania (∼1 wt.% Cr2O3) and published data (13 structures) on tourmalines from different deposits with Cr content up to 36 oxide wt.%. The boundary between the ordered and the disordered distribution of Cr between Y and Z octahedral sites is determined near 1.03 ± 0.27 Cr apfu and relationships between Cr content and structural parameters (unit-cell parameters, octahedral bond-lengths, charge of Y and Z sites and polyhedral deformation) are established. An increasing Cr content in tourmaline causes an increase of both lattice parameters, of and bond-lengths and a regular variation of the charge of the Y and Z octahedra. In general, the structure becomes less deformed by reducing the distortion of the octahe",
author = "O.S. Vereshchagin and I.V. Rozhdestvenskaya and O.V. Frank-Kamenetskaya and A.A. Zolotarev",
year = "2014",
doi = "10.1127/0935-1221/2014/0026-2372",
language = "English",
volume = "26",
pages = "309--321",
journal = "European Journal of Mineralogy",
issn = "0935-1221",
publisher = "SCHWEIZERBART Science Publishers",
number = "2",

}

RIS

TY - JOUR

T1 - Ion substitutions and structural adjustment in Cr-bearing tourmalines

AU - Vereshchagin, O.S.

AU - Rozhdestvenskaya, I.V.

AU - Frank-Kamenetskaya, O.V.

AU - Zolotarev, A.A.

PY - 2014

Y1 - 2014

N2 - The geological settings of Cr-bearing tourmaline occurrences are reviewed and the crystal chemistry of Cr-bearing tourmalines is analysed on the basis of new X-ray single-crystal structure refinements (R0.019–0.025) of three crystals from the Ural deposits (Cr2O3 content ∼6 wt.%) and one from Umba Valley, Tanzania (∼1 wt.% Cr2O3) and published data (13 structures) on tourmalines from different deposits with Cr content up to 36 oxide wt.%. The boundary between the ordered and the disordered distribution of Cr between Y and Z octahedral sites is determined near 1.03 ± 0.27 Cr apfu and relationships between Cr content and structural parameters (unit-cell parameters, octahedral bond-lengths, charge of Y and Z sites and polyhedral deformation) are established. An increasing Cr content in tourmaline causes an increase of both lattice parameters, of and bond-lengths and a regular variation of the charge of the Y and Z octahedra. In general, the structure becomes less deformed by reducing the distortion of the octahe

AB - The geological settings of Cr-bearing tourmaline occurrences are reviewed and the crystal chemistry of Cr-bearing tourmalines is analysed on the basis of new X-ray single-crystal structure refinements (R0.019–0.025) of three crystals from the Ural deposits (Cr2O3 content ∼6 wt.%) and one from Umba Valley, Tanzania (∼1 wt.% Cr2O3) and published data (13 structures) on tourmalines from different deposits with Cr content up to 36 oxide wt.%. The boundary between the ordered and the disordered distribution of Cr between Y and Z octahedral sites is determined near 1.03 ± 0.27 Cr apfu and relationships between Cr content and structural parameters (unit-cell parameters, octahedral bond-lengths, charge of Y and Z sites and polyhedral deformation) are established. An increasing Cr content in tourmaline causes an increase of both lattice parameters, of and bond-lengths and a regular variation of the charge of the Y and Z octahedra. In general, the structure becomes less deformed by reducing the distortion of the octahe

U2 - 10.1127/0935-1221/2014/0026-2372

DO - 10.1127/0935-1221/2014/0026-2372

M3 - Article

VL - 26

SP - 309

EP - 321

JO - European Journal of Mineralogy

JF - European Journal of Mineralogy

SN - 0935-1221

IS - 2

ER -

ID: 7002442