| Reference Type | Journal (article/letter/editorial) |
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| Title | The crystal structure of arangasite, Al2F(PO4)(SO4)·9H2O determined using low-temperature synchrotron data |
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| Journal | Mineralogical Magazine |
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| Authors | Yakubovich, O. V. | Author |
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| Steele, I. M. | Author |
| Chernyshev, V. V. | Author |
| Zayakina, N. V. | Author |
| Gamyanin, G. N. | Author |
| Karimova, O. V. | Author |
| Year | 2014 (August) | Volume | 78 |
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| Issue | 4 |
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| Publisher | Mineralogical Society |
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| DOI | doi:10.1180/minmag.2014.078.4.09Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 244544 | Long-form Identifier | mindat:1:5:244544:5 |
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| GUID | 0 |
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| Full Reference | Yakubovich, O. V., Steele, I. M., Chernyshev, V. V., Zayakina, N. V., Gamyanin, G. N., Karimova, O. V. (2014) The crystal structure of arangasite, Al2F(PO4)(SO4)·9H2O determined using low-temperature synchrotron data. Mineralogical Magazine, 78 (4) 889-903 doi:10.1180/minmag.2014.078.4.09 |
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| Plain Text | Yakubovich, O. V., Steele, I. M., Chernyshev, V. V., Zayakina, N. V., Gamyanin, G. N., Karimova, O. V. (2014) The crystal structure of arangasite, Al2F(PO4)(SO4)·9H2O determined using low-temperature synchrotron data. Mineralogical Magazine, 78 (4) 889-903 doi:10.1180/minmag.2014.078.4.09 |
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| Abstract/Notes | AbstractThe 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)°, 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. |
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