title: Structural characterization and composition of Y-rich hainite from Sakharjok nepheline syenite pegmatite (Kola Peninsula, Russia)
metadata.name: dc.date.accessioned
metadata.value: 2020-09-09T07:29:28Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2020-09-09T07:29:28Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2015
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/19305
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: Y-rich hainite occurs in nepheline syenite pegmatite
  of the Sakharjok massif (Kola Peninsula, Russia). It forms
  euhedral prismatic crystals up to 2 mm in length as well as
  rims around an unidentified mineral phase (silicate of Ca, Y,
  Zr and Ti). The mineral is triclinic, space group P-1, a
  9.6054(10), b 5.6928(6), c 7.3344(7) Å, α 89.903(2), β
  101.082(2), γ 100.830(2)°, V 386.32(7) Å3, Z=1. The calculated
  density is 3.39 g/cm3. Chemical composition of
  Sakharjok hainite is different from the previously published
  data by much higher Y and Nb contents up to 0.72 and 0.20
  atoms per formula unit, respectively, by the two- to five-fold
  depletion in the LREEs and by the strong enrichment of the
  HREEs. From the single-crystal X-ray diffraction data, there
  is a significant amount of Y in the M1 site associated with the
  absence of Zr in it. Nb and Zr are concentrated in the M5 site
  substituting Ti. Combination of single-crystal X-ray diffraction
  data and electron microprobe data give the empirical formula
  (Ca1.04Y0.63REE0.24Mn0.02)Σ1.93(Na0.92Ca0.77)Σ1.69Ca2.00
  (Na0.65Ca0.10)Σ0.75(Ti 0 .60Zr0.21Nb0.15Fe0 .03)Σ0.99
  ((Si4.00Al0.02)Σ4.02O14) (F2.61O1.39)Σ4.00.
metadata.lang: en_GB
metadata.name: dc.title
metadata.value: Structural characterization and composition of Y-rich hainite from Sakharjok nepheline syenite pegmatite (Kola Peninsula, Russia)
metadata.lang: en_GB
resources.filename: 3.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/19305/1/3.pdf
resources.format: Adobe PDF
resources.size: 841,47 kB