title: Batievaite-(Y), Y2Ca2Ti[Si2O7]2(OH)2(H2O)4, a new mineral from nepheline syenite pegmatite in the Sakharjok massif, Kola Peninsula, Russia
metadata.name: dc.date.accessioned
metadata.value: 2020-09-09T07:30:22Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2020-09-09T07:30:22Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2016
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/19306
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: Batievaite-(Y), Y2Ca2Ti[Si2O7]2(OH)2(H2O)4, is a
  new mineral found in nepheline syenite pegmatite in the
  Sakharjok alkaline massif, Western Keivy, Kola Peninsula,
  Russia. The pegmatite mainly consists of nepheline, albite,
  alkali pyroxenes, amphiboles, biotite and zeolites.
  Batievaite-(Y) is a late-pegmatitic or hydrothermal mineral
  associated with meliphanite, fluorite, calcite, zircon,
  britholite-group minerals, leucophanite, gadolinite-subgroup
  minerals, titanite, smectites, pyrochlore-group minerals,
  zirkelite, cerianite-(Ce), rutile, behoite, ilmenite, apatitegroup
  minerals, mimetite, molybdenite, and nickeline.
  Batievaite-(Y) is pale-cream coloured with white streak and
  dull, greasy or pearly luster. Its Mohs hardness is 5–5.5. No
  cleavage or parting was observed. The measured density is
  3.45(5) g/cm3. Batievaite-(Y) is optically biaxial positive, α
  1.745(5), β 1.747(5), γ 1.752(5) (λ 589 nm), 2Vmeas.=60(5)°,
  2Vcalc.= 65°. Batievaite-(Y) is triclinic, space group P-1, a
  9.4024(8), b 5.5623(5), c 7.3784(6) Å, α 89.919(2), β
  101.408(2), γ 96.621(2)°, V 375.65(6) Å3 and Z= 1. The eight
  strongest lines of the X-ray powder diffraction pattern
  [d(Å)(I)(hkl)] are: 2.991(100)(11-2), 7.238(36)(00-1),
  3.061(30)(300), 4.350(23)(0-1-1), 9.145(17)(100),
  4.042(16)(11-1), 2.819(16)(3-10), 3.745(13)(2-10). The
  chemical composition determined by electron probe microanalysis
  (EPMA) i s (wt.%): Nb2O5 2.25, TiO2
  8.01, ZrO2 2.72, SiO2 29.96, Al2O3 0.56, Fe2O3 0.43, Y2O3
  11.45, La2O3 0.22, Ce2O3 0.33, Nd2O3 0.02, Gd2O3
  0.07, Dy2O3 0.47, Er2O3 1.07, Tm2O3 0.25, Yb2O3 2.81,
  L u 2 O 3 0 . 4 5 , C a O 2 4 . 9 8 , M n O 1 . 3 1 ,
  MgO 0.01, Na2O 1.13, K2O 0.02, F 2.88, Cl 0.19, H2O 6.75
  (determined on the basis of crystal structure data), O= (F,Cl)
  −1.25, total 97.09 wt.%. The empirical formula based on the
  EPMA and single-crystal structure analyses i s
  (Y0.81Ca0.65Mn0.15Zr0.12Yb0.11Er0.04Fe3+
  0.04Ce0.02Dy0.02
  Lu0.02La0.01Tm0.01)Σ2.00((H2O)0.75Ca0.70□0.55)Σ2.00Ca2.00
  (□0.61Na0.25( H2O)0.14)Σ1.00(Ti0.76Nb0.15Zr0.09)Σ1.00
  [(Si3.91Al0.09)Σ4.00O14]((OH)1.56F0.44)Σ2.00((H2O)1.27F0.73)
  Σ2.00. The infrared spectrum of the mineral contains the following
  bands (cm−1): 483, 584, 649, 800, 877, 985, 1630,
  1646, 1732, 3426. Batievaite-(Y) belongs to the rosenbuschite
  group minerals and is the Na-deficient Y-analogue of hainite.
  The mineral is named in honour of the Russian geologist Iya
  Dmitrievna Batieva (1922–2007) in recognition of her remarkable
  contribution into the geology and petrology of metamorphic
  and alkaline complexes of the Kola Peninsula.
metadata.lang: en_GB
metadata.name: dc.title
metadata.value: Batievaite-(Y), Y2Ca2Ti[Si2O7]2(OH)2(H2O)4, a new mineral from nepheline syenite pegmatite in the Sakharjok massif, Kola Peninsula, Russia
metadata.lang: en_GB
resources.filename: 4.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/19306/1/4.pdf
resources.format: Adobe PDF
resources.size: 1,03 MB