Crystallography Reports

, Volume 50, Issue 4, pp 539–543

Crystal structure of golyshevite

  • K. A. Rozenberg
  • R. K. Rastsvetaeva
  • N. V. Chukanov
  • I. A. Verin
Structure of Inorganic Compounds

Abstract

The crystal structure of golyshevite, a new calcium-and carbon-rich representative of the eudialyte group, was established by single-crystal X-ray diffraction analysis (sp. gr. R3m, a = 14.231(3) Å, c = 29.984(8) Å, R = 0.062, 1643 reflections with F > 3σ(F)). The idealized formula of golyshevite is (Na10Ca3)Ca6Zr3Fe2SiNb[Si3O9]2[Si9O27]2(OH)3(CO3) · H2O. This mineral is characterized by the presence of calcium atoms both in the octahedral positions of six-membered rings and in extraframework positions, where calcium prevails. CO3 groups are present as the major additional anions. Carbon atoms randomly occupy two positions on the threefold z axis at a distance of 0.75 Å from each other and are coordinated by oxygen atoms arranged around the z axis.

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Copyright information

© Pleiades Publishing, Inc. 2005

Authors and Affiliations

  • K. A. Rozenberg
    • 1
  • R. K. Rastsvetaeva
    • 2
  • N. V. Chukanov
    • 3
  • I. A. Verin
    • 2
  1. 1.Faculty of GeologyMoscow State UniversityVorob’evy gory, MoscowRussia
  2. 2.Shubnikov Institute of CrystallographyRussian Academy of SciencesMoscowRussia
  3. 3.Institute of Problems of Chemical Physics, Chernogolovka BranchRussian Academy of SciencesChernogolovka, Moscow oblastRussia

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