New Data on the Isomorphism in Eudialyte-Group Minerals. IV: Modular Structure of Titanosilicate with Replacement of Na by Mn in the Alluaivite Module
- Авторлар: Rastsvetaeva R.K.1, Viktorova K.A.1, Aksenov S.M.1
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Мекемелер:
- Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics,” Russian Academy of Sciences
- Шығарылым: Том 64, № 4 (2019)
- Беттер: 586-589
- Бөлім: Structure of Inorganic Compounds
- URL: https://journals.rcsi.science/1063-7745/article/view/194081
- DOI: https://doi.org/10.1134/S1063774519040163
- ID: 194081
Дәйексөз келтіру
Аннотация
A new modular eudialyte-group mineral—titanosilicate—from the Lovozero massif has been investigated using X-ray diffraction. The trigonal-cell parameters are found to be a = 14.069(4) Å, c = 60.63(1) Å, and V = 10393(1) Å3; sp. gr. R\(\bar {3}\)m. The crystal structure is refined to final reliability factor R = 5.6% in the anisotropic approximation of atomic displacements using 1210F > 3σ(F). The idealized mineral formula (Z = 3) is Na28Ca12[Na4.6][Mn1.4]Ti6[Si52O132(О,OH)16](H2O)3.5Cl1.5. The problems of the modular representatives of the group at the Zr–Ti isomorphism in the framework site and the Na–Mn isomorphism in the alluaivite module М2 sites are discussed.
Авторлар туралы
R. Rastsvetaeva
Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics,”Russian Academy of Sciences
Хат алмасуға жауапты Автор.
Email: rast@crys.ras.ru
Ресей, Moscow, 119333
K. Viktorova
Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics,”Russian Academy of Sciences
Email: rast@crys.ras.ru
Ресей, Moscow, 119333
S. Aksenov
Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics,”Russian Academy of Sciences
Email: rast@crys.ras.ru
Ресей, Moscow, 119333
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