Crystal structure of magnesio-ferri-hornblendite □Ca2(Mg4Fe3+)[(Si7Al)O22](OH)2 as a potentially new mineral of the amphibole supergroup
- Авторлар: Zarubina E.1, Aksenov S.1,2, Chukanov N.3, Rastsvetaeva R.1
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Мекемелер:
- Shubnikov Institute of Crystallography
- Vernadsky Institute of Geochemistry and Analytical Chemistry
- Institute of Problems of Chemical Physics, Chernogolovka Branch
- Шығарылым: Том 470, № 1 (2016)
- Беттер: 245-251
- Бөлім: Chemistry
- URL: https://journals.rcsi.science/0012-5008/article/view/153752
- DOI: https://doi.org/10.1134/S0012500816090032
- ID: 153752
Дәйексөз келтіру
Аннотация
A sample of magnesio-ferri-hornblendite, a potential new mineral of the amphibole supergroup, was studied by X-ray diffraction and IR spectroscopy. The crystal chemical formula is (Z = 2): AK0.04M(4) (Ca1.92Na0.08) C[M(1)(Mg1.78Fe0.224+) M(2)(Mg1.62Fe0.263+Al0.12) M(3)(Mg0.64Fe0.322+Mn0.04)] [T(Si7.44Al0.56)O22] W(OH)2. The monoclinic unit cell parameters are a = 9.855(1) Å, b = 18.084(1) Å, c = 5.289(1) Å, β = 104.853(2)°; V = 911.1(2) Å3; space group C2/m; Z = 2. The crystal structure was refined to R = 2.82% in the anisotropic approximation for atomic displacement parameters using 1166 reflections with I > 2σ(I). The magnesio-ferri-hornblendite structure is generally similar to the structures of other monoclinic calcium amphiboles, and its key distinctive features are the predominance of Мg among C2+ cations and Fe3+ among C3+ cations.
Авторлар туралы
E. Zarubina
Shubnikov Institute of Crystallography
Хат алмасуға жауапты Автор.
Email: zarubina-gems@yandex.ru
Ресей, Leninskii pr. 59, Moscow, 119991
S. Aksenov
Shubnikov Institute of Crystallography; Vernadsky Institute of Geochemistry and Analytical Chemistry
Email: zarubina-gems@yandex.ru
Ресей, Leninskii pr. 59, Moscow, 119991; ul. Kosygina 19, Moscow, 119991
N. Chukanov
Institute of Problems of Chemical Physics, Chernogolovka Branch
Email: zarubina-gems@yandex.ru
Ресей, Chernogolovka, Moscow oblast, 142432
R. Rastsvetaeva
Shubnikov Institute of Crystallography
Email: zarubina-gems@yandex.ru
Ресей, Leninskii pr. 59, Moscow, 119991