| Reference Type | Journal (article/letter/editorial) |
|---|
| Title | Metavivianite, Fe2+Fe3+2(PO4)2(OH)2·6H2O: new data and formula revision |
|---|
| Journal | Mineralogical Magazine |
|---|
| Authors | Chukanov, N. V. | Author |
|---|
| Scholz, R. | Author |
| Aksenov, S. M. | Author |
| Rastsvetaeva, R. K. | Author |
| Pekov, I. V. | Author |
| Belakovskiy, D. I. | Author |
| Krambrock, K. | Author |
| Paniago, R. M. | Author |
| Righi, A. | Author |
| Martins, R. F. | Author |
| Belotti, F. M. | Author |
| Bermanec, V. | Author |
| Year | 2012 (June) | Volume | 76 |
|---|
| Issue | 3 |
|---|
| Publisher | Mineralogical Society |
|---|
| DOI | doi:10.1180/minmag.2012.076.3.20Search in ResearchGate |
|---|
| Generate Citation Formats |
|---|
| Mindat Ref. ID | 244246 | Long-form Identifier | mindat:1:5:244246:8 |
|---|
|
| GUID | 0 |
|---|
| Full Reference | Chukanov, N. V., Scholz, R., Aksenov, S. M., Rastsvetaeva, R. K., Pekov, I. V., Belakovskiy, D. I., Krambrock, K., Paniago, R. M., Righi, A., Martins, R. F., Belotti, F. M., Bermanec, V. (2012) Metavivianite, Fe2+Fe3+2(PO4)2(OH)2·6H2O: new data and formula revision. Mineralogical Magazine, 76 (3) 725-741 doi:10.1180/minmag.2012.076.3.20 |
|---|
| Plain Text | Chukanov, N. V., Scholz, R., Aksenov, S. M., Rastsvetaeva, R. K., Pekov, I. V., Belakovskiy, D. I., Krambrock, K., Paniago, R. M., Righi, A., Martins, R. F., Belotti, F. M., Bermanec, V. (2012) Metavivianite, Fe2+Fe3+2(PO4)2(OH)2·6H2O: new data and formula revision. Mineralogical Magazine, 76 (3) 725-741 doi:10.1180/minmag.2012.076.3.20 |
|---|
| Abstract/Notes | AbstractThe composition, structure, X-ray powder diffraction pattern, optical properties, density, infrared, Raman and Mössbauer spectra, and thermal properties of a homogeneous sample of metavivianite from the Boa Vista pegmatite, near Galiléia, Minas Gerais, Brazil are reported for the first time. Metavivianite is biaxial (+) with α = 1.600(3), β = 1.640(3), γ = 1.685(3) and 2Vmeas = 85(5)°. The measured and calculated densities are Dmeas = 2.56(2) and Dcalc = 2.579 g cm–3. The chemical composition, based on electronmicroprobe analyses, Mössbauer spectroscopy (to determine the Fe2+:Fe3+ ratio) and gas chromatography (to determine H2O) is MgO 0.70, MnO 0.92, FeO 17.98, Fe2O3 26.60, P2O5 28.62, H2O 26.5; total 101.32 wt.%. The empirical formula is (Fe3+1.64Fe2+1.23Mg0.085Mn0.06)Σ3.015(PO4)1.98(OH)1.72·6.36H2O. Metavivianite is triclinic, P1̄, a = 7.989(1), b = 9.321(2), c = 4.629(1) Å, α = 97.34(1), β = 95.96(1), γ = 108.59(2)°, V = 320.18(11) Å3 and Z = 1. The crystal structure was solved using a single-crystal techniques to an agreement index R = 6.0%. The dominant cations in the independent sites are Fe2+ and Fe3+, with multiplicities of 1 and 2, respectively. The simplified crystal-chemical formula for metavivianite is Fe2+ (Fe3+, Fe2+)2(PO4)2(OH,H2O)2·6H2O; the endmember formula is Fe2+Fe3+2(PO4)2(OH)2·6H2O, which is dimorphous with ferrostrunzite. |
|---|
These are possibly similar items as determined by title/reference text matching only.
