Structural Patterns of Cr-Bearing Phases and the Influence of Chromium on the Solid Solutions of the Major Mantle Minerals and Phase Transitions

  • Ekaterina A. MatrosovaEmail author
  • Andrey V. Bobrov
  • Luca Bindi
Part of the Springer Geology book series (SPRINGERGEOL)


Crystals of chromium-rich phases of fair diffraction quality synthesized in experiments on the investigation of phase relations in the SiO2–MgO–Cr2O3 system, have been studied by means of single-crystal X-ray diffraction. For the selected phases (majorite-knorringite garnet, akimotoite, bridgmanite, MgCr2O4 with calcium-titanate-type structure, Mg(Mg,Si,Cr)2O4 with distorted calcium-titanate structure, anhydrous phase B, olivine, wadsleyite and ringwoodite), we determined the unit-cell parameters, the space group, and the mechanism of chromium incorporation in their structures. Also, we compare the influence of two minor elements (aluminum and chromium) on the unit-cell parameters of deep minerals (garnet, akimotoite and bridgmanite).


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Copyright information

© Springer Nature Switzerland AG 2020

Authors and Affiliations

  • Ekaterina A. Matrosova
    • 1
    Email author
  • Andrey V. Bobrov
    • 2
  • Luca Bindi
    • 3
  1. 1.Vernadsky Institute of Geochemistry and Analytical Chemistry RASMoscowRussia
  2. 2.Department of GeologyMoscow State UniversityMoscowRussia
  3. 3.Dipartimento di Scienze della TerraUniversità degli Studi di FirenzeFlorenceItaly

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