Search

Your search keyword '"Gamyanin, G. N."' showing total 24 results
Start Over Author "Gamyanin, G. N."
24 results on '"Gamyanin, G. N."'

19. Main Metallogenic Units of the Sakha Republic (Yakutia), Russia

Author

Parfenov, L. M., primary, Vetluzhskikh, V. G., additional, Gamyanin, G. N., additional, Davydov, Yu. V., additional, Deikunenko, A. V., additional, Kostin, A. V., additional, Nikitin, V. M., additional, Prokop'yev, A. V., additional, Smelov, A. P., additional, Supletsov, V. M., additional, Timofeyev, V. F., additional, Fridovskiy, V. Yu., additional, Kholmogorov, A. I., additional, and Yakovlev, Ya. V., additional

Published
1999
Full Text
View/download PDF

22. Metallogenic zoning of the Sakha Republic (Yakutia) territory

Author

Parfenov, L. M., Vetluzhakikh, V. G., Gamyanin, G. N., Davydov, Y. V., Deikunenko, A. V., Kostin, A. V., Nikitin, V. M., Prokopiev, A. V., Smelov, A. V., Supletsov, V. M., Timofeev, V. F., Valery Fridovsky, Kholmolgorov, A. I., and Yakovlev, Y. V.

24. The crystal structure of arangasite, Al2F(PO4)(SO4)·9H2O determined using low-temperature synchrotron data.

Author

Yakubovich, O. V., Steele, I. M., Chernyshev, V. V., Zayakina, N. V., Gamyanin, G. N., and Karimova, O. V.

Subjects
*PHOSPHATES, *SULFATES, *CRYSTAL structure, *SYNCHROTRON radiation, *LOW temperatures, *HYDROGEN bonding
Abstract

The crystal structure of the fibrous mineral arangasite, Al2F(PO4)(SO4)·9H2O from the Alyaskitovoje deposit, Eastern Yakutiya, Russia, was solved using low-temperature single-crystal data from synchrotron radiation and refined against F2 to R = 9.8%. Arangasite crystallizes in the monoclinic space group P2/a, with unit-cell parameters a = 7.073(1), b = 9.634(2), c = 10.827(2) Å, β = 100.40(1)º, V = 725.7(7) Å3 and Z = 2. The positions of all the independent H atoms were obtained by difference- Fourier techniques and refined in an isotropic approximation. The arangasite crystal structure is built from one-dimensional chains of Al octahedra and PO4 tetrahedra sharing vertices, quasi-isolated SO4 tetrahedra and H2O molecules. All O atoms are involved in the system of H bonding, acting as donors and/or acceptors. Hydrogen bonding serves as the only mechanism providing linkage between the main structural fragments, thus maintaining the framework. Chains of corner-sharing Al octahedra and P tetrahedra in the arangasite structure are topologically identical to the chains built from (Fe, Al) octahedra and P tetrahedra in the crystal structure of destinezite, Fe2(OH)(PO4)(SO4)·6H2O. It has been shown that in spite of very similar chemical formulae, arangasite and sanjuanite, Al2(OH)(PO4)(SO4)·9H2O, are not isotypic. [ABSTRACT FROM AUTHOR]

Published
2014
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results