| Reference Type | Journal (article/letter/editorial) |
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| Title | Batagayite, CaZn2(Zn,Cu)6(PO4)4(PO3OH)3·12H2O, a new phosphate mineral from Këster tin deposit (Yakutia, Russia): occurrence and crystal structure |
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| Journal | Mineralogy and Petrology |
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| Authors | Yakovenchuk, Victor N. | Author |
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| Pakhomovsky, Yakov A. | Author |
| Konopleva, Nataliya G. | Author |
| Panikorovskii, Taras L. | Author |
| Bazai, Ayya | Author |
| Mikhailova, Julia A. | Author |
| Bocharov, Vladimir N. | Author |
| Ivanyuk, Gregory Yu. | Author |
| Krivovichev, Sergey V. | Author |
| Year | 2018 (August) | Volume | 112 |
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| Issue | 4 |
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| Publisher | Springer Science and Business Media LLC |
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| Download URL | https://rruff.info/rruff_1.0/uploads/MP112_591.pdf+ |
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| DOI | doi:10.1007/s00710-017-0551-xSearch in ResearchGate |
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| Generate Citation Formats |
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| Classification | Not set | LoC | Not set |
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| Mindat Ref. ID | 17539 | Long-form Identifier | mindat:1:5:17539:9 |
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| GUID | 0 |
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| Full Reference | Yakovenchuk, Victor N., Pakhomovsky, Yakov A., Konopleva, Nataliya G., Panikorovskii, Taras L., Bazai, Ayya, Mikhailova, Julia A., Bocharov, Vladimir N., Ivanyuk, Gregory Yu., Krivovichev, Sergey V. (2018) Batagayite, CaZn2(Zn,Cu)6(PO4)4(PO3OH)3·12H2O, a new phosphate mineral from Këster tin deposit (Yakutia, Russia): occurrence and crystal structure. Mineralogy and Petrology, 112 (4) 591-601 doi:10.1007/s00710-017-0551-x |
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| Plain Text | Yakovenchuk, Victor N., Pakhomovsky, Yakov A., Konopleva, Nataliya G., Panikorovskii, Taras L., Bazai, Ayya, Mikhailova, Julia A., Bocharov, Vladimir N., Ivanyuk, Gregory Yu., Krivovichev, Sergey V. (2018) Batagayite, CaZn2(Zn,Cu)6(PO4)4(PO3OH)3·12H2O, a new phosphate mineral from Këster tin deposit (Yakutia, Russia): occurrence and crystal structure. Mineralogy and Petrology, 112 (4) 591-601 doi:10.1007/s00710-017-0551-x |
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| In | (2018, August) Mineralogy and Petrology Vol. 112 (4) Springer Science and Business Media LLC |
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| Abstract/Notes | Batagayite, CaZn2(Zn,Cu)6(PO4)4(PO3OH)3·12H2O, is a new secondary phosphate mineral from the Këster deposit, Arga-Ynnykh-Khai massif, NE Yakutia, Russia. It is monoclinic, P21, a = 8.4264(4), b = 12.8309(6), c = 14.6928(9) Å, β = 98.514(6)o, V = 1571.05(15) Å3 and Z = 2 (from single-crystal X-ray diffraction data). Batagayite crystals are blades up to 2 mm long, flattened on {001} and elongated on [100]; blades often grow in radial aggregates. Associated minerals are arsenolite, native copper, epifanovite, fluorapatite, libethenite, Na-analogue of batagayite, pseudomalachite, quartz, sampleite, tobermorite, and Mg-analogue of hopeite. The streak is white and the luster is vitreous. The mineral is brittle and has a perfect cleavage on {001}, no parting was observed. The Mohs hardness is 3. Density, determined by the float-sink method in Clerici solution, is 2.90(3) g/cm3, and the calculated density is 3.02 g/cm3 (using the empirical formula and single-crystal unit-cell parameters). Batagayite is biaxial, optically negative, α = 1.566 ± 0.002, β = 1.572 ± 0.002, γ = 1.573 ± 0.002 at 589 nm. 2V meas. = 40(5)°, 2V calc = 44.3°. Optical orientation: Z is perpendicular to (001), further details unclear. No dispersion or pleochroism were observed. The mean chemical composition determined by electron microprobe is: Na2O 0.31, MgO 1.39, Al2O3 0.55, SiO2 0.48, P2O5 34.37, K2O 0.17, CaO 2.76, MnO 1.03, CuO 5.80, ZnO 35.62, CdO 0.24 wt%. The H2O content estimated from the crystal-structure refinement is 16.83 wt%, giving a total of 99.55 wt%. The empirical formula calculated on the basis of P + Si = 7 is (Zn6.22Cu1.04Ca0.70Mg0.49Mn0.21Al0.15Na0.14K0.05Cd0.03)Σ9.03(P6.89Si0.11)Σ7.00O24.91(OH)3.09·12.10H2O. The mineral easily dissolves in 10% room-temperature HCl. The eight diagnostic lines in the X-ray powder-diffraction pattern are (I-d[Å]-hkl): 100-14.59-001, 25-6.34-012, 11-6.02-111, 37-4.864-003, 13-4.766-112, 20-3.102-1 , 11-2.678-2 , 16-2.411-044. The crystal structure of batagayite was solved by direct methods and refined to R 1 = 0.069 for 3847 independent reflections with F o > 4σ(F o). It is based upon complex heteropolyhedral [M 8(PO4)4(PO3OH)3(H2O)9]2− layers parallel to the (001) plane. The layer can be considered as consisting of three sublayers, one A and two B. The central A layer has the composition [M 4(PO4)4(H2O)4]4− and consists of the zigzag chains of edge-sharing (MO6) octahedra running parallel to the a axis and linked into layers by sharing peripheral O atoms. The (PO4) tetrahedra are attached above and below the holes created by the linkage of zigzag octahedral chains. The B sublayer consists of chains of (ZnO4) and (PO3OH) tetrahedra. The interlayer space is occupied by the Ca2+ cations and H2O molecules. Batagayite is a secondary low-temperature mineral formed as a result of alteration of primary minerals such as native copper and fluorapatite. On the basis of its structural complexity calculated as 1058.257 bits/cell (taking into account contributions from H atoms), batagayite should be considered as a very complex mineral. The high complexity of batagayite is due to its high hydration state and the modular character of its structure, which contains both octahedral-tetrahedral layers and tetrahedral chains. |
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